Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ns Hopkins University ill conformity with the requirements for the degree of Doctoi of PhilosophyBaltimore, MD41671© 2014 Khanh An Huynh All Rights ReservedABSTRACTThe rapid growth ill the utilization of engineered nanomaterials for industrial and research applications, as well as in consumer produc Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ts, will inevitably result in the release of these nanomaterials into the enviroiunent, In natural and subsurface waters, engineered nanomatenals canHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
undergo aggregation with each other (homoaggregation) or with other types of nanoparticles (heteioaggregation). such as naturally occurring colloids (HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments is expected to play a more important role than homoaggregation in determining the environmental fate and transport of engineered nanomatenals. While homoaggregation of engineered nanomaterials has been extensively investigated, the heteroaggregation behavior of these nanomaterials has rarely been st Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments udied and therefore IS not well luiderstood.The objectives of this dissertation woik are to investigate the heteroaggregation of engineered nanomateriHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
als with hematite nanoparticles (HemNPs). a model NOC. and the effects of heteroaggregation on the antimicrobial activity of engineered nanomaterials.HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments he dissertation, aggr egation studies demonstrate that the heteroaggregation rate between CNTs and HemNPs depends on the concentration ratio between CNTs and HeniNPs. The heteroaggregation rate increases with an initial increase in the CNT/HemNP concentration ratio, reaches the maximum value at an o Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ptimal concentration ratio, and then decreases with further increase 111 the concentration ratio. In the presence of luunic acid, the maximiun heteroaHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
ggregation rate decreases when the humic acid concentration is increased As the1CNT-HemNP heteroaggregates are exposed lo solution chemistries that leHETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments cgates becomes more susceptible to disaggregation. The heteroaggregation behavior of two other caibon-based nanoma I dials. namely, graphene oxide nanosliccts turd fullerene (Cno) xianopai tides, with HemXPs is also investigated and compared with that of CNTs with HemNPs.hl the second pail of the di Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ssertation, the homoaggregation behavior of citrate-coated AgNPs in NaCl solution is shown to be in excellent agreement with the Derjaguin-Landau-VerwHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
ey-Ovcrbcck (DLVO) theory. Polyvinylpyrrolidone (PVP) IS shown to be a more effective stabilizer than citrate in both monovalent (NaCl) and divalent (HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments rticles ill NaCl solutions and also at low CaCh concentrations. Conversely, humic acid enhances the homoaggregation kinetics of both AgNPs at high CaCl> concentrations. In addition, the heteroaggregalion between citrate-coated AgNPs and HemNPs is shown for the first time to reduce the antimicrobial Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments activity of AgNPs toward Escherichia coli bacteriaAdvisor: Kai Loon ChenCommittee members: Fdward J Bonwer. William p. Ball, and D Howard Fairbrother1Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
1ACKNOWLEDGEMENTSFirst and foremost, I would like to drank my advisor. Professor Kai Loon Chen, who has been the most important person that helped me HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments anding, and supportive whenever I needed Ins help and advice. I believe that the skills and knowledge that I acquit ed with the help of Kai Loon are sufficient for me to build my own future successful career.I would like to thank the members of my dissertation committee: Professors Edward Bouwer. Bi Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ll Ball, and Howard Fairbrother for spending their tune reading this dissertation and providing me with valuable feedback throughout my Ph D. studies.Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
In addition, I would like to acknowledge Professors Haiou Huang and Joelle Frechette for serving on my Graduate Board Oral Examination, as well as PrHETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments owledge, but also have given me valuable suggestions to increase the quality of my work. My Ph D research could not be completed without the help from Dr. Michael McCafTery from the Integrated Imaging Center at JHU. Michael has been always an extremely helpfill and patient collaborator, who agreed t Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments o spend a lot of his tune capturing beautiful cryogenic transmission electron micrographs for my research projects. I would like to thank previous memHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
bers of Fairbrother’s group, Drs. Billy Smith and Kevin Wepasmck. for oxidizing and characterizing the carbon nanotubes used in my dissertation workI HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments llmade me always feel at home. At DoGEE. I have received a world-class education and made life-long friendships. I had the opportunities to take classes and have stimulating discussions with many inspiring professors such as Professors Edward Bouwer. Alan Stone. Bill Ball, and Lynn Roberts. I would Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments like to specially thank Ed. Alan, and Bill for countlessly helping me on job hunting and giving me inputs and opinions regarding my research and futurHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
e career plans. In addition. I would like to acknowledge tremendous help from Keith and other DoGEE staff members, such as Denise. Adena. Cliristine, HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments ee. Wenyu. Hany. Xitong. and Yeunook. for their help when we have been working together 111 the lab. I also would like to thank Jin. Pavlo. Amar. .Andrew. Chip. Jessica, Katie. John. Nate. Phillip. Xiaomeng. and other students and postdocs in the wet groups at DoGEE for then support.I would like to Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments thank the Vietnam Education Foundation (VEF) for funding me through the first two years of my Ph D. study. Because of then- support, my dream of gettiHeteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
ng a Ph D degree from Hopkins has become a reality. Finally. I would like to thank my family members for tlieừ unconditional love, support, and encourHETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to John Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments tunnel.IVTABLE OF CONTENTSTABLE OF CONTENTS...............................................................VLIST OF FIGURES................................................................lxLIST OF TABLES................................................................xvlCHAPTER 1. INTRODUCTION........ Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments .................................................11.1.Two Popular Engineered Nanomaterials: Carbon Nanotubes and SilverNanoparticles..................Heteroaggregation between engineered nanomaterials and hematite nanoparticles in aquatic environments
..............................................21.2.Fate and Transport of Carbon Nanotubes and Silver Nanoparticles AquaticEnvironments................HETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to JohnHETEROAGGREGATION BETWEEN ENGINEERED NANOMATERIALS AND HEMATITE NANOPARTICLES IN AQUATIC ENVIRONMENTSby Khanh An HuynhA dissertation submitted to JohnGọi ngay
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