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You searched for +publisher:"Temple University" +contributor:("Zhang, Judy"). Showing records 1 – 2 of 2 total matches.

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Temple University

1. Bhattarai, Bikash. DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER.

Degree: PhD, 2015, Temple University

Civil Engineering

There are many reports indicating the presence of various emerging contaminants (ECs) in treated wastewater and other water sources. The detection of such contaminants in the environment and the ability of these contaminants to pose potential threats to the environment at very low concentrations have led to a need for more efficient treatment technologies. Cyclodextrins (CDs) have gained significant interest as an alternative adsorbent for water and wastewater treatment because of their unique physico-chemical characteristics and excellent selectivity towards organic compounds. The property of CD to form inclusion complexes with various molecules through host-guest interactions has made it a useful compound for the removal of a number of contaminants from water and wastewater. The overall goal of the study is to identify and develop a novel adsorbent for the removal of ECs of interest. The specific objectives are a) to synthesize various beta-cyclodextrin (BCD) based adsorbents by coating BCD onto different supports such as silica, filter paper, iron oxide, and zeolite, b) to perform batch and column experiments using the developed adsorbents, c) to evaluate the performance of the adsorbents in different water matrices such as MQ water, simulated wastewater in presence of humic acid, and real municipal wastewater, d) to study the regeneration potential of the adsorbents. In this research, various (BCD) based hybrid adsorbents were synthesized and their performances were evaluated based on the removal of selected ECs. At first, chemically bonded BCD onto silica particles as hybrid adsorbents were synthesized by using crosslinking agents and copolymers. Three different methods were used to synthesize 14 different BCD coated silica adsorbents. The adsorbent prepared by reacting BCD with hexamethylene diisocyanate (HMDI) as crosslinking agent and dimethyl sulfoxide (DMSO) as solvent showed best results in removing the ECs studied. The adsorbent showed more than 95% removal of 17β-estradiol (in single component) and more than 90% of most of the estrogens (mixture of 12), more than 99% of perfluorooctanoic acid (PFOA) (in single component) and more than 90% of most of the PFCs (mixture of 10), and a maximum of 90% removal in case of BPA. The adsorption capacity of the developed adsorbent was observed to be higher for the removal of 17β-estradiol and PFOA than that of commercially available activated carbon (F400) in MQ water. In order to represent the real environmental scenario, further batch experiments were conducted for the removal of two PFCs (PFOA and PFOS (perfluorooctane sulfonic acid)), 17β-estradiol, and BPA at environmentally relevant concentrations from wastewater. The adsorbent was effective in removing the ECs that were spiked in the secondary effluent of a municipal wastewater treatment plant. Furthermore, the adsorbent was successfully regenerated with methanol over four cycles without significant loss in its adsorption capacity for the removal of PFOA and estrogens. Ozonation as an…

Advisors/Committee Members: Suri, Rominder P.S.;, Suri, Rominder P.S., Zhang, Judy, Van Aken, Benoit, Pleshko, Nancy;.

Subjects/Keywords: Engineering; Environmental engineering;

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

APA (6th Edition):

Bhattarai, B. (2015). DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,332757

Chicago Manual of Style (16th Edition):

Bhattarai, Bikash. “DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER.” 2015. Doctoral Dissertation, Temple University. Accessed September 19, 2020. http://digital.library.temple.edu/u?/p245801coll10,332757.

MLA Handbook (7th Edition):

Bhattarai, Bikash. “DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER.” 2015. Web. 19 Sep 2020.

Vancouver:

Bhattarai B. DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER. [Internet] [Doctoral dissertation]. Temple University; 2015. [cited 2020 Sep 19]. Available from: http://digital.library.temple.edu/u?/p245801coll10,332757.

Council of Science Editors:

Bhattarai B. DEVELOPMENT OF NOVEL ADSORBENTS FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WATER AND WASTEWATER. [Doctoral Dissertation]. Temple University; 2015. Available from: http://digital.library.temple.edu/u?/p245801coll10,332757


Temple University

2. Du, Enpeng. NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD.

Degree: PhD, 2015, Temple University

Physics

Small-angle neutron scattering (SANS) is a very powerful laboratory technique for micro structure research which is similar to the small angle X-ray scattering (SAXS) and light scattering for microstructure investigations in various materials. In small-angle neutron scattering (SANS) technique, the neutrons are elastically scattered by changes of refractive index on a nanometer scale inside the sample through the interaction with the nuclei of the atoms present in the sample. Because the nuclei of all atoms are compact and of comparable size, neutrons are capable of interacting strongly with all atoms. This is in contrast to X-ray techniques where the X-rays interact weakly with hydrogen, the most abundant element in most samples. The SANS refractive index is directly related to the scattering length density and is a measure of the strength of the interaction of a neutron wave with a given nucleus. It can probe inhomogeneities in the nanometer scale from 1nm to 1000nm. Since the SANS technique probes the length scale in a very useful range, this technique provides valuable information over a wide variety of scientific and technological applications, including chemical aggregation, defects in materials, surfactants, colloids, ferromagnetic correlations in magnetism, alloy segregation, polymers, proteins, biological membranes, viruses, ribosome and macromolecules. Quoting the Nobel committee, when awarding the prize to C. Shull and B. Brockhouse in 1994: “Neutrons tell you where the atoms are and what the atoms do”. At NIST, there is a single beam of neutrons generated from either reactor or pulsed neutron source and selected by velocity selector. The beam passes through a neutron guide then scattered by the sample. After the sample chamber, there are 2D gas detectors to collect the elastic scattering information. SANS usually uses collimation of the neutron beam to determine the scattering angle of a neutron, which results in an even lower signal-to-noise ratio for data that contains information on the properties of a sample. We can analyze the data acquisition from the detectors and get the information on size, shape, etc. This is why we choose SANS as our research tool. The world’s top energy problems are security concerns, climate concerns and environmental concerns. So far, oil (37%) is still the No.1 fuel in world energy consumption (Oil 37%, Coal 25%, Bio-fuels 0.2%, Gas 23%, Nuclear 6%, Biomass 4%, Hydro 3%, Solar heat 0.5%, Wind 0.3%, Geothermal 0.2% and Solar photovoltaic 0.04%). Even more and more alternative energy: bio-fuels, nuclear and solar energy will be used in the future, but nuclear energy has a major safety issue after the Japanese Fukushima I nuclear accidents, and other energies contribute only a small percent. Thus, it is very important to improve the efficiency and reduce the population of petroleum products. There is probably one thing that we can all agree on: the world’s energy reserves are not unlimited. Even though it is limited, only 30% of the oil reserves is conventional oil,…

Advisors/Committee Members: Tao, R. (Rongjia);, Tao, R. (Rongjia), Burkhardt, T. W. (Theodore W.), Wu, Xifan, Chen, Jimmy, Zhang, Judy;.

Subjects/Keywords: Physics; Energy; Materials Science;

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

APA (6th Edition):

Du, E. (2015). NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,335675

Chicago Manual of Style (16th Edition):

Du, Enpeng. “NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD.” 2015. Doctoral Dissertation, Temple University. Accessed September 19, 2020. http://digital.library.temple.edu/u?/p245801coll10,335675.

MLA Handbook (7th Edition):

Du, Enpeng. “NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD.” 2015. Web. 19 Sep 2020.

Vancouver:

Du E. NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD. [Internet] [Doctoral dissertation]. Temple University; 2015. [cited 2020 Sep 19]. Available from: http://digital.library.temple.edu/u?/p245801coll10,335675.

Council of Science Editors:

Du E. NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD. [Doctoral Dissertation]. Temple University; 2015. Available from: http://digital.library.temple.edu/u?/p245801coll10,335675

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