Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(magnetic nanoparticle systems). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters

1. Huang, Yuxiong. Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants.

Degree: 2015, University of California – eScholarship, University of California

Water is not only a resource, but a life source. However, water pollution is one of the most challenging global issues that seriously threatened to people's life and sustainable development. With the continual concern over the presence of naturally-occurring and anthropogenic organic and inorganic contaminants in the aquatic environment, there is a growing need for the implementation of innovative treatment methods for the elimination of these contaminants from natural waters and wastewater effluents. Featuring high adsorption capacity, good regenerability, and surface area accessibility, magnetic nanoparticles (MNPs) have emerged as a new generation of sorbent materials for environmental decontamination in the past few years. Due to their superparamagnetic property that can be attracted to a magnetic field, it is easy to separate these MNPs adhered with contaminants from aqueous solution or complicated matrices by simply applying an external magnetic field; no filtration, centrifugation or gravitational separation is needed, making them a much more sustainable option than more traditional approaches for removing organic and inorganic contaminants. In this doctoral research, 4 different novel magnetic-core composite nanoparticle sorbents were developed for organic and metal contaminants remediation in aquatic systems. These sorbents have a core-shell structure with a magnetite core and a silica porous layer that permanently confines surfactant micelles (namely as Mag-PCMAs, targeting organic contaminants removal) or are functionalized with metal-binding organic ligands (namely as Mag-Ligands, targeting metal contaminants removal). The physicochemical properties of these magnetic nanoparticle sorbent was fully characterized via transmission electron microscopy, scanning electron microscopy, thermogravimetric analyses, fourier transform infrared spectroscopy, superconducting quantum interference device magnetometer, X-ray diffraction and BET porosimeter. The removal efficiencies of organic contaminants such as PAHs, emerging organic contaminants (EOCs, including pharmaceuticals, industrial additives) onto Mag-PCMAs and metal contaminants such as cadmium, lead, mercury, chromium and etc. onto Mag-Ligand were evaluated across a wide range of environmental conditions (e.g. pH, water hardness). The adsorption isotherms and kinetics of various contaminants onto the magnetic nanoparticle sorbents were determined respectively. Competitive sorption studies were conducted to determine the selectivity sequence among multiple metal ions onto Mag-Ligands. Isothermal titration microcalorimetry (ITC) was used to obtain key quantitative thermodynamic binding data of the interactions between Mag-Ligand and metal ions, providing the enthalpy, entropy and free energy of binding values as well as binding constants. Micelle swelling agent was used to optimize Mag-PCMAs’ porous structure for increasing pore volume and surface area to achieve higher removal efficiency and sorption kinetics. In addition, study was investigated on…

Subjects/Keywords: Environmental science; Environmental engineering; aquatic systems; decontamination; magnetic separation; nanoparticle; regeneration; sorption

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Huang, Y. (2015). Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants. (Thesis). University of California – eScholarship, University of California. Retrieved from http://www.escholarship.org/uc/item/2wt6p7s3

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

Chicago Manual of Style (16th Edition):

Huang, Yuxiong. “Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants.” 2015. Thesis, University of California – eScholarship, University of California. Accessed July 17, 2019. http://www.escholarship.org/uc/item/2wt6p7s3.

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

MLA Handbook (7th Edition):

Huang, Yuxiong. “Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants.” 2015. Web. 17 Jul 2019.

Vancouver:

Huang Y. Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants. [Internet] [Thesis]. University of California – eScholarship, University of California; 2015. [cited 2019 Jul 17]. Available from: http://www.escholarship.org/uc/item/2wt6p7s3.

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

Council of Science Editors:

Huang Y. Novel Magnetic Nanoparticle Adsorbents for Organic and Inorganic Contaminants. [Thesis]. University of California – eScholarship, University of California; 2015. Available from: http://www.escholarship.org/uc/item/2wt6p7s3

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


Northeastern University

2. Ahmadniaroudsari, Mani. A cyber-physical framework for MRI guided magnetic nano/micro particles.

Degree: MS, Department of Mechanical and Industrial Engineering, 2016, Northeastern University

Recent research based on phantom and clinical studies, has shown that Magnetic Resonance Imaging (MRI) can be employed to navigate and target drug-loaded magnetic micro particles to deep-seated lesions in the human body. This method is based on using the MRI machine as the propulsion force to guide the magnetic micro particles through the intravascular system of the human or animal body.; Here we investigate the feasibility of extending these steering systems to magnetic nanoparticle systems. Simulations indicate that flow and Brownian disruptions dominate the energy landscape in Nano regime. However we have found that we can benefit from the tendency of magnetic nanoparticles to aggregate under applied fields to form larger aggregates to drive our system.; We have conducted both experiment and simulation on how magnetic in-vitro will aggregate in the presence of a fixed magnetic field and can move in fluidic flow and concentrate due to the magnetic field gradients. In this work we compare our simulation against simple validating experiments of flow channels subject to controlled magnetic fields and field gradients. Overall, we find that under certain circumstances we are able to aggregate them into larger clusters to enhance their magnetic response, track velocity of the chainlike aggregates by simulations and validate them with experiments.

Subjects/Keywords: magnetic nanoparticle systems; targeted drug delivery; Nanoparticles; Magnetic properties; Drug delivery systems; Simulation methods; Nanomedicine; Magnetic resonance imaging; Magnetic fields; Aggregation (Chemistry)

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Ahmadniaroudsari, M. (2016). A cyber-physical framework for MRI guided magnetic nano/micro particles. (Masters Thesis). Northeastern University. Retrieved from http://hdl.handle.net/2047/D20194483

Chicago Manual of Style (16th Edition):

Ahmadniaroudsari, Mani. “A cyber-physical framework for MRI guided magnetic nano/micro particles.” 2016. Masters Thesis, Northeastern University. Accessed July 17, 2019. http://hdl.handle.net/2047/D20194483.

MLA Handbook (7th Edition):

Ahmadniaroudsari, Mani. “A cyber-physical framework for MRI guided magnetic nano/micro particles.” 2016. Web. 17 Jul 2019.

Vancouver:

Ahmadniaroudsari M. A cyber-physical framework for MRI guided magnetic nano/micro particles. [Internet] [Masters thesis]. Northeastern University; 2016. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/2047/D20194483.

Council of Science Editors:

Ahmadniaroudsari M. A cyber-physical framework for MRI guided magnetic nano/micro particles. [Masters Thesis]. Northeastern University; 2016. Available from: http://hdl.handle.net/2047/D20194483

.