+publisher:"University of North Carolina" +contributor:("Miller, Cass T.")

University of North Carolina

1. Lee, Juneil. Modeling groundwater for the coastal plain region of North Carolina.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:ba948637-9217-447b-b2d7-67c1d4d6a72d

► Groundwater is main source of water in the Central Coastal Plain (CCP) of North Carolina. The use of groundwater in the CCP has increased steadily… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, J. (2008). Modeling groundwater for the coastal plain region of North Carolina. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:ba948637-9217-447b-b2d7-67c1d4d6a72d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, Juneil. “Modeling groundwater for the coastal plain region of North Carolina.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:ba948637-9217-447b-b2d7-67c1d4d6a72d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Juneil. “Modeling groundwater for the coastal plain region of North Carolina.” 2008. Web. 26 Jan 2021.

Vancouver:

Lee J. Modeling groundwater for the coastal plain region of North Carolina. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:ba948637-9217-447b-b2d7-67c1d4d6a72d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee J. Modeling groundwater for the coastal plain region of North Carolina. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:ba948637-9217-447b-b2d7-67c1d4d6a72d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

2. Fan, Xiangyu. Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:1232ebe6-efd5-4f05-96a6-5c6545f63170

► The brine barrier remediation technique (BBRT) has been proposed as a novel Brine barrier remediation techniques (BBRT) that use surfactants have been proposed for remediating… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fan, X. (2008). Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:1232ebe6-efd5-4f05-96a6-5c6545f63170

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fan, Xiangyu. “Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:1232ebe6-efd5-4f05-96a6-5c6545f63170.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fan, Xiangyu. “Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination.” 2008. Web. 26 Jan 2021.

Vancouver:

Fan X. Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:1232ebe6-efd5-4f05-96a6-5c6545f63170.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fan X. Multiscale modeling of surfactant phase behavior in the remediation of DNAPL contamination. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:1232ebe6-efd5-4f05-96a6-5c6545f63170

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

3. Sanderson, Patrick M. Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology.

Degree: Environmental Sciences and Engineering, 2006, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:578fd7f8-499c-4ecb-89df-f5462233105d

► With the general inability of existing groundwater remediation techniques to efficiently remove dense non-aqueous phase liquids (DNAPLs) from the subsurface, a novel strategy known as… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sanderson, P. M. (2006). Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:578fd7f8-499c-4ecb-89df-f5462233105d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sanderson, Patrick M. “Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology.” 2006. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:578fd7f8-499c-4ecb-89df-f5462233105d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sanderson, Patrick M. “Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology.” 2006. Web. 26 Jan 2021.

Vancouver:

Sanderson PM. Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology. [Internet] [Thesis]. University of North Carolina; 2006. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:578fd7f8-499c-4ecb-89df-f5462233105d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sanderson PM. Development and Application of Analytical Methods to Evaluate DNAPL Remediation Using a Brine Based Remediation Technology. [Thesis]. University of North Carolina; 2006. Available from: https://cdr.lib.unc.edu/record/uuid:578fd7f8-499c-4ecb-89df-f5462233105d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

4. Li, Huina. Modeling multiphase flow in porous medium systems at multiple scales.

Degree: Environmental Sciences and Engineering, 2006, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:d8d5476a-ffb7-4a86-b6ed-8ca9c9e325b5

► Problems involving multiphase flow and transport in porous media arise in a number of scientific and engineering applications including oil reservoir engineering and groundwater remediation.… (more)

▼ Problems involving multiphase flow and transport in porous media arise in a number of scientific and engineering applications including oil reservoir engineering and groundwater remediation. The inherent complexity of multiphase systems and the marked heterogeneity over multiple spatial scales result in significant challenges to the fundamental understanding of the multiphase flow and transport processes. For many decades, multiphase flow has been modeled using the traditional approach based on mass conservation and the generalized Darcy's law. The traditional approach, however, is subject to model errors and numerical errors. The focus of this dissertation research is to improve models of flow and transport in porous medium systems using numerical modeling approaches for a range of scales including pore scale and continuum scale. A major part of this research examines the deficiency of Darcy's relationship and its extension to multiphase flow using the lattice-Boltzmann (LB) approach. This study investigates the conventional relative permeability saturation relation for systems consisting of water and non-aqueous phase liquid (NAPL). In addition, it also examines the generalized formulation accounting for the interfacial momentum transfer and lends additional support to the hypothesis that interfacial area is a critical variable in multiphase porous medium systems. Another major part of the research involves developing efficient and robust numerical techniques to improve the solution approach for existing models. In particular, a local discontinuous Galerkin (LDG) spatial discretization method is developed in combination with a robust and established variable order, variable step-size temporal integration approach to solve Richards' equation (RE). Effective spatial adaptive LDG methods are also developed to further enhance the efficiency. The resulting simulator with both spatial and temporal adaption has demonstrated good performance for a series of problems modeled by RE. Advisors/Committee Members: Li, Huina, Miller, Cass T..

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, H. (2006). Modeling multiphase flow in porous medium systems at multiple scales. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:d8d5476a-ffb7-4a86-b6ed-8ca9c9e325b5

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Li, Huina. “Modeling multiphase flow in porous medium systems at multiple scales.” 2006. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:d8d5476a-ffb7-4a86-b6ed-8ca9c9e325b5.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Li, Huina. “Modeling multiphase flow in porous medium systems at multiple scales.” 2006. Web. 26 Jan 2021.

Vancouver:

Li H. Modeling multiphase flow in porous medium systems at multiple scales. [Internet] [Thesis]. University of North Carolina; 2006. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:d8d5476a-ffb7-4a86-b6ed-8ca9c9e325b5.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Li H. Modeling multiphase flow in porous medium systems at multiple scales. [Thesis]. University of North Carolina; 2006. Available from: https://cdr.lib.unc.edu/record/uuid:d8d5476a-ffb7-4a86-b6ed-8ca9c9e325b5

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

5. Murphy, Lauren L. The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation.

Degree: Environmental Sciences and Engineering, 2006, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:f7e1796f-c4a9-4bdc-904b-b13818710878

► Dense nonaqueous phase liquids (DNAPLs) are a long-term source of groundwater contamination. Difficulties of current remediation methods have led to the study of a novel… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Murphy, L. L. (2006). The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:f7e1796f-c4a9-4bdc-904b-b13818710878

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Murphy, Lauren L. “The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation.” 2006. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:f7e1796f-c4a9-4bdc-904b-b13818710878.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Murphy, Lauren L. “The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation.” 2006. Web. 26 Jan 2021.

Vancouver:

Murphy LL. The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation. [Internet] [Thesis]. University of North Carolina; 2006. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:f7e1796f-c4a9-4bdc-904b-b13818710878.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Murphy LL. The effects of viscosity and subsurface heterogeneity on a brine barrier approach to DNAPL remediation. [Thesis]. University of North Carolina; 2006. Available from: https://cdr.lib.unc.edu/record/uuid:f7e1796f-c4a9-4bdc-904b-b13818710878

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

6. Jackson, Amber Bess Sallerson. Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach.

Degree: Mathematics, 2011, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:a339dbef-42a3-4b41-af6b-a4816f0b8f14

► Traditional approaches to multiscale modeling of multiphase flow and transport are riddled with deficiencies and inconsistencies across scales. The thermodynamically constrained averaging theory (TCAT) approach… (more)

Subjects/Keywords: College of Arts and Sciences; Department of Mathematics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jackson, A. B. S. (2011). Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:a339dbef-42a3-4b41-af6b-a4816f0b8f14

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jackson, Amber Bess Sallerson. “Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach.” 2011. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:a339dbef-42a3-4b41-af6b-a4816f0b8f14.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jackson, Amber Bess Sallerson. “Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach.” 2011. Web. 26 Jan 2021.

Vancouver:

Jackson ABS. Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach. [Internet] [Thesis]. University of North Carolina; 2011. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:a339dbef-42a3-4b41-af6b-a4816f0b8f14.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jackson ABS. Multiscale modeling of multiphase flow in porous media using the thermodynamically constrained averaging theory approach. [Thesis]. University of North Carolina; 2011. Available from: https://cdr.lib.unc.edu/record/uuid:a339dbef-42a3-4b41-af6b-a4816f0b8f14

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

7. McClure, James E. Microscale modeling of fluid flow in porous medium systems.

Degree: Environmental Sciences and Engineering, 2011, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:3c6df8b4-642f-42b9-9bc3-1e18ae38d33c

► Proper mathematical description of macroscopic porous medium flows is essential for the study of a wide range of subsurface contamination scenarios. Existing mathematical formulations, however,… (more)

▼ Proper mathematical description of macroscopic porous medium flows is essential for the study of a wide range of subsurface contamination scenarios. Existing mathematical formulations, however, demonstrate inadequacies that preclude the accurate description of many systems. Multi-scale models developed using thermodynamically constrained averaging theory (TCAT) rigorously define macroscopic variables in terms of more well-understood microscopic counterparts, permitting detailed analysis of macroscopic model forms based on microscale simulation and experiment. Within this framework, the primary objectives of microscale modeling are to elucidate important physical mechanisms and to inform both the form of macroscale closure relations as well as associated parameter values. In order to meet these goals, numerical tools must include: (1) simulations that provide accurate microscopic solutions for physical phenomena in large, complex domains; (2) morphological analysis tools that can be used to upscale simulation results to larger scales as dictated by the associated theoretical framework. Development of a numerical toolbox for microscale porous medium studies is considered in line with these objectives, including both implementation and optimization strategies. High-performance implementations of the lattice Boltzmann method are developed to simulate one- and two-phase flows using several computing platforms. A modified marching cubes algorithm is developed to explicitly construct all entities in a two-phase system, including all interfaces between the fluid and solid phases in addition to the three phase contact curve. These entities serve as a numerical skeleton for upscaling multiphase porous medium simulation results to the macroscale. Based on these tools, development of macroscopic constitutive laws is illustrated for a special case of anisotropic flow in porous media. In this example, microscale simulation is used to demonstrate a limitation of existing macroscopic forms for cases in which the momentum resistance depends on the flow direction in addition to the orientation. A modified macroscopic form is proposed in order to properly account for this phenomenon. Advisors/Committee Members: McClure, James E., Miller, Cass T..

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

McClure, J. E. (2011). Microscale modeling of fluid flow in porous medium systems. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:3c6df8b4-642f-42b9-9bc3-1e18ae38d33c

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

McClure, James E. “Microscale modeling of fluid flow in porous medium systems.” 2011. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:3c6df8b4-642f-42b9-9bc3-1e18ae38d33c.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

McClure, James E. “Microscale modeling of fluid flow in porous medium systems.” 2011. Web. 26 Jan 2021.

Vancouver:

McClure JE. Microscale modeling of fluid flow in porous medium systems. [Internet] [Thesis]. University of North Carolina; 2011. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:3c6df8b4-642f-42b9-9bc3-1e18ae38d33c.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

McClure JE. Microscale modeling of fluid flow in porous medium systems. [Thesis]. University of North Carolina; 2011. Available from: https://cdr.lib.unc.edu/record/uuid:3c6df8b4-642f-42b9-9bc3-1e18ae38d33c

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

8. Birak, Pamela S. Remediation of multicomponent dense nonaqueous phase liquids in porous media.

Degree: Environmental Sciences and Engineering, 2011, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:7e2657cf-4fa3-4d1b-9a93-07ee090254eb

► In 2004, the U.S. EPA estimated that as many as 45,000 former manufactured gas plants (FMGPs) required remediation of contaminated soil or groundwater. The primary… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Birak, P. S. (2011). Remediation of multicomponent dense nonaqueous phase liquids in porous media. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:7e2657cf-4fa3-4d1b-9a93-07ee090254eb

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Birak, Pamela S. “Remediation of multicomponent dense nonaqueous phase liquids in porous media.” 2011. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:7e2657cf-4fa3-4d1b-9a93-07ee090254eb.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Birak, Pamela S. “Remediation of multicomponent dense nonaqueous phase liquids in porous media.” 2011. Web. 26 Jan 2021.

Vancouver:

Birak PS. Remediation of multicomponent dense nonaqueous phase liquids in porous media. [Internet] [Thesis]. University of North Carolina; 2011. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:7e2657cf-4fa3-4d1b-9a93-07ee090254eb.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Birak PS. Remediation of multicomponent dense nonaqueous phase liquids in porous media. [Thesis]. University of North Carolina; 2011. Available from: https://cdr.lib.unc.edu/record/uuid:7e2657cf-4fa3-4d1b-9a93-07ee090254eb

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

9. Hauswirth, Scott C. Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media.

Degree: Environmental Sciences and Engineering, 2014, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:b990c121-f1ac-4e6f-969a-ef5df79135a3

► Tars produced as a by-product of coal and oil gasification at former manufactured gas plants (FMGPs) during the 19th and early 20th centuries were often… (more)

▼ Tars produced as a by-product of coal and oil gasification at former manufactured gas plants (FMGPs) during the 19th and early 20th centuries were often released into the environment through poor disposal practices or leaks in holding tanks and piping. These tars are persistent contaminants, leaching polycyclic aromatic hydrocarbons (PAHs) into groundwater and posing a significant risk to human and ecological health. FMGP tars also have several properties that make them notoriously difficult to remediate. They are dense non-aqueous phase liquids (DNAPLs), so they can migrate to depths which make removal by excavation difficult or impossible, and their relatively high viscosities and ability to alter the wetting characteristics of porous media result in inefficient removal by traditional pump-and-treat methods. This work investigates the relationship between tar composition and properties, and explores several remediation approaches. The interfacial tension (IFT) of a set of FMGP tars was measured as a function of pH and correlated with compositional features. It was observed that IFT is a strongly decreasing function of pH, suggesting the potential use of high pH (alkaline) solutions to mobilize FMGP tar in porous media systems. Laboratory column experiments were conducted to investigate the use of alkaline solutions, alone and in combination with natural polymers (xanthan gum) and surfactants, to remediate tar-contaminated porous media. The results of these experiments indicated that alkaline-surfactant-polymer (ASP) solutions could efficiently remove 95% of residual tar. Surfactant-polymer (SP) solutions removed an even greater fraction of residual tar, over 99%, but required a larger flushing volume to do so. These experiments also illustrated that both ASP and SP flushing significantly reduced dissolved-phase PAH concentrations, which are often the primary concern at contaminated FMGP sites. Advisors/Committee Members: Hauswirth, Scott C., Miller, Cass T..

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hauswirth, S. C. (2014). Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:b990c121-f1ac-4e6f-969a-ef5df79135a3

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hauswirth, Scott C. “Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media.” 2014. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:b990c121-f1ac-4e6f-969a-ef5df79135a3.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hauswirth, Scott C. “Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media.” 2014. Web. 26 Jan 2021.

Vancouver:

Hauswirth SC. Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media. [Internet] [Thesis]. University of North Carolina; 2014. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:b990c121-f1ac-4e6f-969a-ef5df79135a3.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hauswirth SC. Physicochemical Approaches for the Remediation of Manufactured Gas Plant Tar in Porous Media. [Thesis]. University of North Carolina; 2014. Available from: https://cdr.lib.unc.edu/record/uuid:b990c121-f1ac-4e6f-969a-ef5df79135a3

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

10. Tapscott, Caroline. An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems.

Degree: Environmental Sciences and Engineering, 2015, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:d7d14af6-b0c4-438a-a0f3-84f0fcf6c42e

► Hydraulic fracturing, or fracking, is a technology being applied across the US to increase the permeability of shale deposits containing natural gas by injecting a… (more)

Subjects/Keywords: Environmental sciences; Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tapscott, C. (2015). An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:d7d14af6-b0c4-438a-a0f3-84f0fcf6c42e

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tapscott, Caroline. “An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems.” 2015. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:d7d14af6-b0c4-438a-a0f3-84f0fcf6c42e.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tapscott, Caroline. “An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems.” 2015. Web. 26 Jan 2021.

Vancouver:

Tapscott C. An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems. [Internet] [Thesis]. University of North Carolina; 2015. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:d7d14af6-b0c4-438a-a0f3-84f0fcf6c42e.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tapscott C. An Evaluation of Flow and Transport Properties for Hydraulic Fracturing Fluids in Porous Medium Systems. [Thesis]. University of North Carolina; 2015. Available from: https://cdr.lib.unc.edu/record/uuid:d7d14af6-b0c4-438a-a0f3-84f0fcf6c42e

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

11. Dye, Amanda. Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling.

Degree: Environmental Sciences and Engineering, 2015, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:ea4cc594-b801-488f-9e32-65521eb57392

► Modeling two-fluid-phase flow in porous medium systems requires the specification of closure relations to produce a solvable system. The thermodynamically constrained averaging theory (TCAT) has… (more)

▼ Modeling two-fluid-phase flow in porous medium systems requires the specification of closure relations to produce a solvable system. The thermodynamically constrained averaging theory (TCAT) has been used to formulate a closed model and to yield insights about the underlying microscale processes that must be represented at the macroscale. In this work we evaluate these TCAT developments using a two-dimensional microfluidic cell and an advanced lattice Boltzmann model (LBM). Microfluidic experiments were performed in which the external fluid pressures were varied and the system was allowed to equilibrate for a period of time before the next step change in fluid pressures. LBM simulations of drainage and imbibition were performed to mimic the experiments. Using imaging techniques the fluid distributions, interfacial areas, and interfacial curvatures of the experimental data were compared to the numerical results and analyzed. LBM simulations showed good agreement with the experimental data. The validated LBM was used to investigate the closure relations of the TCAT model. LBM simulations provided support for the existence of a unique relationship between capillary pressure, fluid saturation, and fluid-fluid interfacial area. The simulations also revealed that the approach to an equilibrium state involves a relatively slow process in which fluid interfaces relax to their equilibrium state. Motivated by this physical process, a temporally adaptive domain decomposition algorithm was developed using a level-set method to locate interfaces and estimate their rate of advancement. The proposed adaptive algorithm was shown to reduce computational effort by an order of magnitude, while yielding essentially identical solutions to a conventional fully coupled approach. Futhurmore, the microfluidic experiments were modified to study the dynamics of a two-fluid-phase flow. Viscous fingering and Haines jumps were visualized. The validated LBM was used to model the experimental data and showed good agreement for certain aspects of the dynamics. Overall, the results show that the developed experimental and computational techniques can be used to evaluate multiscale theoretical models of porous medium systems accurately. Advisors/Committee Members: Dye, Amanda, Miller, Cass T., Adalsteinsson, David, Gray, William, Huang, Jingfang, Prins, Jan, Vizuete, William.

Subjects/Keywords: Environmental engineering; Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dye, A. (2015). Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:ea4cc594-b801-488f-9e32-65521eb57392

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dye, Amanda. “Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling.” 2015. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:ea4cc594-b801-488f-9e32-65521eb57392.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dye, Amanda. “Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling.” 2015. Web. 26 Jan 2021.

Vancouver:

Dye A. Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling. [Internet] [Thesis]. University of North Carolina; 2015. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:ea4cc594-b801-488f-9e32-65521eb57392.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dye A. Analysis of Two-Fluid-Phase Porous Medium Systems Using Microscale Experiments and Lattice Boltzmann Modeling. [Thesis]. University of North Carolina; 2015. Available from: https://cdr.lib.unc.edu/record/uuid:ea4cc594-b801-488f-9e32-65521eb57392

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

12. Wright, Deona. Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies.

Degree: Environmental Sciences and Engineering, 2010, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:45c4e103-eb42-4f2d-8f13-44a8aa2f3bd6

► Concerted efforts to remediate subsurface systems contaminated with dense nonaqueous phase liquids (DNAPLs) have achieved limited success when measured by comparing solute concentrations to drinking… (more)

▼ Concerted efforts to remediate subsurface systems contaminated with dense nonaqueous phase liquids (DNAPLs) have achieved limited success when measured by comparing solute concentrations to drinking water quality standards. A novel treatment technology using a class of brine barrier remediation technologies (BBRTs) based on surfactant- and gravity-induced mobilization, dense brine containment and collection, and a vapor-phase extraction polishing step is utilized to remediate such systems. A series of investigations were conducted using one- and three-dimensional laboratory experiments, a field-scale experiment, and modeling to investigate the impact of BBRTs, the effectiveness of source-zone remediation, and to investigate the establishment, persistence, and rate of removal of a brine layer in a controlled system. Laboratory and field-scale experiments are performed using the suggested methodology. It is shown that under certain conditions, less than 1% of the original DNAPL mass remained in the laboratory system. DNAPL mobilization and recovery in the field-scale experiment was relatively ineffective due in part to the low saturation levels of the DNAPL. The results show that essentially complete removal of a DNAPL is required to reach typical cleanup standards and that details of the morphology and topology of a DNAPL distribution, in addition to the saturation, play an important role in determining the rate of mass transfer. The behavior of dense, viscous calcium bromide brine solutions used to remediate these experimental systems consists of a density of 1.7 times, and a corresponding viscosity of 6.3 times, that of water is obtained at a calcium bromide mass fraction of 0.53. The results show that a dense brine layer can be established, maintained, and recovered to a significant extent. Regions of unstable density profiles are shown to develop and persist in the field-scale experiment, which we attribute to regions of low hydraulic conductivity. The saturated-unsaturated, variable-density ground-water flow simulation code SUTRA is modified to describe the system of interest, and used to compare simulations to experimental observations and to investigate certain unobserved aspects of these complex systems. Advisors/Committee Members: Wright, Deona, Miller, Cass T., Brubaker, Gaylen, DiGiano, Francis A., Gray, William, McLaughlin, Richard, Singer, Philip.

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wright, D. (2010). Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:45c4e103-eb42-4f2d-8f13-44a8aa2f3bd6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wright, Deona. “Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies.” 2010. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:45c4e103-eb42-4f2d-8f13-44a8aa2f3bd6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wright, Deona. “Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies.” 2010. Web. 26 Jan 2021.

Vancouver:

Wright D. Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies. [Internet] [Thesis]. University of North Carolina; 2010. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:45c4e103-eb42-4f2d-8f13-44a8aa2f3bd6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wright D. Remediation of Dense Nonaqueous Phase Liquids from Contaminated Subsurface Systems Using a Class of Brine-Based Remediation Technologies. [Thesis]. University of North Carolina; 2010. Available from: https://cdr.lib.unc.edu/record/uuid:45c4e103-eb42-4f2d-8f13-44a8aa2f3bd6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

13. Boyer, Treavor. Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:68627f21-7050-4966-b208-d308d788f843

► Natural organic matter (NOM) is ubiquitous in the aquatic environment and is of concern because it impacts engineered and natural processes. For example, during water… (more)

▼ Natural organic matter (NOM) is ubiquitous in the aquatic environment and is of concern because it impacts engineered and natural processes. For example, during water treatment, NOM reacts with chlorine to form disinfection byproducts that may be associated with adverse health effects. The conventional water treatment process sequence of coagulation, flocculation, clarification, and filtration is the most common treatment approach used to remove NOM. Anion exchange treatment, however, has the potential to be more effective than conventional treatment. To realize the potential of anion exchange technology, an improved understanding of the interactions among NOM, raw water characteristics, anion exchange resins, and process operating parameters is required. The experimental scale, flow regime, and test water were systematically varied to investigate the removal of NOM by anion exchange treatment. Bench-scale batch experiments were conducted using synthetic model waters containing NOM isolates and commercially available anion exchange resins, including a magnetic ion exchange (MIEX) resin. The charge density of the NOM isolates was fundamental to understanding anion exchange reactions. Ion exchange was clearly shown to be the mode of removal of NOM by anion exchange resins. Pilot-scale continuous-flow experiments were conducted using a local raw drinking water and MIEX resin. The effective resin dose, which is the product of the resin concentration and the resin regeneration ratio, was identified as the most important process operating parameter. The pilot plant study demonstrated that anion exchange treatment could be operated more effectively than previously believed. In addition, the pilot-scale continuous-flow tests and bench-scale batch experiments gave consistent results. A mathematical model describing the removal of NOM by anion exchange in a completely mixed flow reactor was developed based upon insights gained from the pilot-scale continuous-flow study. Model predictions were found to be in good agreement with experimental data. The validated mathematical model was used to evaluate the relative influence of operating parameters, anion exchange resin properties, and NOM characteristics on process performance. The mathematical model was also used to evaluate various treatment scenarios. This dissertation presents a unified framework for understanding the removal of NOM by anion exchange treatment. Advisors/Committee Members: Boyer, Treavor, Singer, Philip, Aiken, George, Christman, Russell, DiGiano, Francis A., Jorgenson, James, Miller, Cass T..

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Boyer, T. (2008). Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:68627f21-7050-4966-b208-d308d788f843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Boyer, Treavor. “Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:68627f21-7050-4966-b208-d308d788f843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Boyer, Treavor. “Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling.” 2008. Web. 26 Jan 2021.

Vancouver:

Boyer T. Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:68627f21-7050-4966-b208-d308d788f843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Boyer T. Removal of Natural Organic Matter by Anion Exchange: Multiscale Experimentation and Mathematical Modeling. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:68627f21-7050-4966-b208-d308d788f843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

14. Newman, Arne. An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:5c6e0d0d-9deb-47d8-ae5f-a93204e330f3

► Manufactured gas plant (MGP) operations across the United States during the late 19th and early 20th centuries resulted in the release of polycyclic aromatic hydrocarbons… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Newman, A. (2008). An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:5c6e0d0d-9deb-47d8-ae5f-a93204e330f3

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Newman, Arne. “An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:5c6e0d0d-9deb-47d8-ae5f-a93204e330f3.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Newman, Arne. “An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites.” 2008. Web. 26 Jan 2021.

Vancouver:

Newman A. An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:5c6e0d0d-9deb-47d8-ae5f-a93204e330f3.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Newman A. An Investigation of Cosolvent Flushing for the Remediation of PAH's from Former Manufacture Gas Plant Sites. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:5c6e0d0d-9deb-47d8-ae5f-a93204e330f3

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

15. Johnston, Richard. Chemical Interactions Between Iron and Arsenic in Water.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:7d89955f-af20-4303-80f1-0520cf552f24

► This dissertation presents results from a series of experiments involving precipitation of ferrous arsenate, redox reactions between various Fe/As couples, and competitive adsorption. Batch and… (more)

▼ This dissertation presents results from a series of experiments involving precipitation of ferrous arsenate, redox reactions between various Fe/As couples, and competitive adsorption. Batch and column experiments were made and interpreted quantitatively using geochemical modeling. A new solubility constant was calculated for symplesite, a ferrous arsenate mineral, and geochemical modeling suggests that some arsenic-impacted groundwaters in Bangladesh are super-saturated with respect to this mineral. Oxidation experiments demonstrated that oxygenation of Fe(II) is much faster in the presence of inorganic buffers than when non-complexing organic buffers are used. Fe(II) oxidation was largely unaffected by the presence of the hydroxyl radical scavenger propanol. These findings call into question the classic formulation of Fe(II) oxygenation, and long-accepted kinetic rate constants. During the oxygenation of Fe(II), As(III) competes with Fe(II) for reactive oxidizing species. As(III) oxidation is reduced in the presence of inorganic ligands, most likely because these ligands increase the reactivity of dissolved Fe(II). Competitive adsorption experiments using goethite demonstrated relatively minor competitive effects between As(III) and As(V), and between As(III) and Fe(II). Batch experiments showed that much more Fe(II) was removed from solution than As(III) or As(V) after contacting the goethite surface. This could be explained by the existence of sites which can adsorb Fe(II) but not As. However, surface complexation modeling with this approach could not capture some of the aspects of multi-component adsorption. An alternate explanation could be that upon adsorption Fe(II) transfers an electron into the bulk surface of the goethite, regenerating Fe(III) at the surface and allowing more adsorption to take place. Column experiments were performed to simulate in situ removal of arsenic and iron, and demonstrated that an alternating push-pull configuration can lead to consistent retardation of both solutes. A 'ripening' effect, whereby the in situ process becomes increasingly efficient as more Fe(III) is emplaced on sediment surfaces, was observed at pH 8, where the process increased the amount of iron oxide in the column by more than 50%, even though the column iron oxide concentration was lower than in naturally arsenic-impacted aquifers such as Bangladesh, implying that in situ treatment in such settings is feasible. Advisors/Committee Members: Johnston, Richard, Singer, Philip, Miller, Cass T., Benninger, Larry, Glaze, William, Vasudevan, Dharni, van Gunten, Urs.

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Johnston, R. (2008). Chemical Interactions Between Iron and Arsenic in Water. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:7d89955f-af20-4303-80f1-0520cf552f24

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Johnston, Richard. “Chemical Interactions Between Iron and Arsenic in Water.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:7d89955f-af20-4303-80f1-0520cf552f24.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Johnston, Richard. “Chemical Interactions Between Iron and Arsenic in Water.” 2008. Web. 26 Jan 2021.

Vancouver:

Johnston R. Chemical Interactions Between Iron and Arsenic in Water. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:7d89955f-af20-4303-80f1-0520cf552f24.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Johnston R. Chemical Interactions Between Iron and Arsenic in Water. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:7d89955f-af20-4303-80f1-0520cf552f24

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

16. Zhu, Hongbo. Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil.

Degree: Environmental Sciences and Engineering, 2008, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:e015a97b-a101-4c27-8f4b-93d2d7aed617

► The contamination of soils by polycyclic aromatic hydrocarbons (PAHs) has posed a serious threat to public health and ecosystems. Bioremediation of PAH-contaminated soils is a… (more)

▼ The contamination of soils by polycyclic aromatic hydrocarbons (PAHs) has posed a serious threat to public health and ecosystems. Bioremediation of PAH-contaminated soils is a low-cost and relatively clean strategy. However, the bioremediation is not always successful, and one of the major causes is the limited PAH bioavailability to microorganisms in the soil system. Surfactant addition is a common strategy to increase the bioavailability of PAHs in the soil. We evaluated two nonionic surfactants, one hydrophobic (Brij 30) and one hydrophilic (C12E8), for their ability to enhance the biodegradation of PAHs and their influence on groups of PAH-degrading bacteria in the bioreactor community that had previously been identified by DNA-based stable-isotope probing. The effects of each surfactant were evaluated at doses corresponding to equilibrium aqueous-phase concentrations well above the surfactant's critical micelle concentration (CMC), slightly above the CMC, and below the CMC. The concentrations of all 3- and 4-ring PAHs were significantly reduced in the soil amended with Brij 30 at the two lower doses compared to controls, whereas removal of only the 3-ring PAHs was significantly enhanced at the highest Brij 30 dose. In contrast, C12E8 did not enhance PAH removal at any dose. Brij 30 addition at the lowest dose significantly increased the desorption of most PAHs, whereas the addition of C12E8 at the lowest dose actually decreased the desorption of all PAHs. Two groups of organisms containing naphthalene- or salicylate-degrading bacteria increased in abundance substantially after incubation with both surfactants. In contrast, Brij 30 inhibited a third group of naphthalene/salicylate degraders and two groups of pyrene-degrading bacteria, and it modestly inhibited the predominant phenanthrene degrader at the highest dose. Overall, this study demonstrates that the effects of the surfactants on PAH biodegradation could be explained by their effects on PAH bioavailability, and that surfactant addition can have differential effects on populations of organisms known to be responsible for contaminant degradation within a microbial community. Advisors/Committee Members: Zhu, Hongbo, Aitken, Michael, Kamens, R. M., Miller, Cass T., Pfaender, Frederic K., Searles, Lillie.

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhu, H. (2008). Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:e015a97b-a101-4c27-8f4b-93d2d7aed617

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhu, Hongbo. “Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil.” 2008. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:e015a97b-a101-4c27-8f4b-93d2d7aed617.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhu, Hongbo. “Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil.” 2008. Web. 26 Jan 2021.

Vancouver:

Zhu H. Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil. [Internet] [Thesis]. University of North Carolina; 2008. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:e015a97b-a101-4c27-8f4b-93d2d7aed617.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhu H. Improvement of the Bioavailability of Polycyclic Aromatic Hydrocarbons in Field-Contaminated Soil. [Thesis]. University of North Carolina; 2008. Available from: https://cdr.lib.unc.edu/record/uuid:e015a97b-a101-4c27-8f4b-93d2d7aed617

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

17. Tao, Ranxin. An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems.

Degree: Environmental Sciences and Engineering, 2016, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:c22c0268-5bcd-451a-83de-c6609f0c6d27

► Groundwater is one of the nation’s most important natural resources, composing a large portion of total freshwater on earth. Therefore, groundwater contamination is a growing… (more)

Subjects/Keywords: Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tao, R. (2016). An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:c22c0268-5bcd-451a-83de-c6609f0c6d27

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tao, Ranxin. “An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems.” 2016. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:c22c0268-5bcd-451a-83de-c6609f0c6d27.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tao, Ranxin. “An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems.” 2016. Web. 26 Jan 2021.

Vancouver:

Tao R. An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems. [Internet] [Thesis]. University of North Carolina; 2016. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:c22c0268-5bcd-451a-83de-c6609f0c6d27.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tao R. An Investigation of Flow Rate Motivated Mobilization of Entrapped Organic Liquids in Two-Fluid Phase Porous Medium Systems. [Thesis]. University of North Carolina; 2016. Available from: https://cdr.lib.unc.edu/record/uuid:c22c0268-5bcd-451a-83de-c6609f0c6d27

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Carolina

18. Bronson, Sydney. Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach.

Degree: Environmental Sciences and Engineering, 2014, University of North Carolina

URL: https://cdr.lib.unc.edu/record/uuid:f1bba815-78da-4aca-952d-e13bfb646ec4

► The thermodynamically constrained averaging theory (TCAT) approach was used to derive a general model for multiphase flow in porous media. Additionally, an entropy inequality was… (more)

Subjects/Keywords: Environmental sciences; Environmental engineering; Gillings School of Global Public Health; Department of Environmental Sciences and Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bronson, S. (2014). Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach. (Thesis). University of North Carolina. Retrieved from https://cdr.lib.unc.edu/record/uuid:f1bba815-78da-4aca-952d-e13bfb646ec4

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bronson, Sydney. “Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach.” 2014. Thesis, University of North Carolina. Accessed January 26, 2021. https://cdr.lib.unc.edu/record/uuid:f1bba815-78da-4aca-952d-e13bfb646ec4.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bronson, Sydney. “Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach.” 2014. Web. 26 Jan 2021.

Vancouver:

Bronson S. Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach. [Internet] [Thesis]. University of North Carolina; 2014. [cited 2021 Jan 26]. Available from: https://cdr.lib.unc.edu/record/uuid:f1bba815-78da-4aca-952d-e13bfb646ec4.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bronson S. Assessing the Minimum Entropy Production Rate Principle for Multiphase Flow Using the Thermodynamically Constrained Averaging Theory Approach. [Thesis]. University of North Carolina; 2014. Available from: https://cdr.lib.unc.edu/record/uuid:f1bba815-78da-4aca-952d-e13bfb646ec4

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations