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Toward Sustainable Water Treatment: ...

Pincus, Lauren Nicole.

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Toward Sustainable Water Treatment: Design of Multifunctional and Selective Water Treatment Technologies.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Toward Sustainable Water Treatment: Design of Multifunctional and Selective Water Treatment Technologies./
作者:	Pincus, Lauren Nicole.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	246 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-12, Section: B.
Contained By:	Dissertations Abstracts International82-12B.
標題:	Environmental engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27743368
ISBN:	9798516922855

Toward Sustainable Water Treatment: Design of Multifunctional and Selective Water Treatment Technologies.
Pincus, Lauren Nicole.

Toward Sustainable Water Treatment: Design of Multifunctional and Selective Water Treatment Technologies. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 246 p.

Source: Dissertations Abstracts International, Volume: 82-12, Section: B.

Thesis (Ph.D.)--Yale University, 2020.

This item must not be sold to any third party vendors.

Access to clean drinking water is a basic human right, yet hundreds of millions of people around the planet are unfortunately forced to drink contaminated waters. Arsenic contaminated drinking water is responsible for the largest global mass poisoning in history in India and Bangladesh where approximately 85 million people have been exposed to either drinking water or crops contaminated with arsenic. Within the United States, high costs of treatment in small to very small communities pose significant barriers to removal of contaminants such as arsenic beneath regulatory limits. This dissertation will detail the development of adsorbent technologies capable of removing arsenic more efficiently and cost effectively with the aim of increasing ease use of these treatment systems in the areas they are still needed most- more rural communities. This goal will be accomplished through two main approaches: 1. Multifunctionality (technologies capable of performing traditionally separate steps in the treatment process simultaneously) and 2. Selectivity (targeted removal of arsenic in the presence of its adsorptive competitors). This work will begin by comprehensively and critically reviewing the literature related to competitive and selective adsorption of oxyanions. Strength of target/competitive oxyanion pairs, metrics to quantify selectivity, and mechanisms by which selectivity can be developed will be detailed. Next, a Cu(II)-n-TiO2-chitosan (CuTICB) adsorbent will be designed which is capable of both multifunctionality (simultaneous photooxidation of As(III) to As(V) in UV light) and selective adsorption of As(V) over its strongest oxyanion competitor, phosphate. The optimal loadings of each active component (Cu(II) and n-TiO2) will be determined in order to maximize both photo-oxidative and selective adsorptive performance. Then, the Fenton-like oxidation of As(III) to As(V) by Cu(II)-chitosan without n-TiO2 and UV will be examined. Finally, transition metal chitosan complexes (TMCs) of varying charge and valence will be systematically examined, their use as selective adsorbents for both As(V) and As(III) over phosphate evaluated, and the mechanism of arsenic adsorption by the TMCs determined. Ultimately, this dissertation finds that Fe(III)-chitosan, due to its ability to form strong inner-sphere complexes with both As(V) and As(III), even in the presence of phosphate is capable of selectively adsorbing both As(V) and As(III) without need for n-TiO2 and UV light to photo-oxidize As(III) into the more easily adsorbed As(V). The novel contributions of this dissertation not only present technologies capable of multifunctional and selective adsorption of arsenic over phosphate, they also develop a predictive understanding of selective adsorption. This knowledge can be applied to target other contaminants of interest in the future, both organic and inorganic.

ISBN: 9798516922855Subjects--Topical Terms:

548583
Environmental engineering.
Subjects--Index Terms:

Arsenic

Toward Sustainable Water Treatment: Design of Multifunctional and Selective Water Treatment Technologies.
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653 $a Sustainability
653 $a Water treatment
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