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Permanent link (DOI): https://doi.org/10.7939/R3KS6J94X

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Fundamental Understanding of the Interactions between Elemental Selenium and Hydrophilic/Hydrophobic Particles in Wastewater Open Access

Descriptions

Other title
Subject/Keyword
Surface forces
Elemental selenium
Wastewater treatment
Coagulant
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Li, Junmeng
Supervisor and department
Liu, Qingxia (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Examining committee member and department
Zeng, Hongbo (Chemical and Materials Engineering)
Kumar, Amit (Mechanical Engineering)
Liu, Qingxia (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2015-09-29T17:14:12Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
In this study, interactions between elemental selenium particles and different surfaces (i.e. Fe(OH)3, silica, octadecyltrichlorosilane (OTS) modified silica and selenium film coated gold) are investigated to understand the behavior of elemental selenium particles in wastewater treatment process. It is found that the Derjaguin-Landau-Verwey-Overbeek (DLVO) forces govern the attachment of elemental selenium particle to Fe(OH)3 and silica surfaces, while additional attractive hydrophobic forces are found when elemental selenium particles interact with OTS modified surface and selenium film. However, elemental selenium is less hydrophobic in nature than OTS modified surface. When Fe(OH)3 is used as a coagulant, the salt concentration greatly impacts the Fe(OH)3 morphology and the interacting forces that the polymer behavior of Fe(OH)3 is promoted at low salt concentration. And the electric double layer (EDL) force decreased and the Van der Waals force dominates at high salt concentration. The fundamental understanding of the interactions between selenium and hydrophobic/ hydrophilic particles in wastewater accelerates the development of new technology for the removal of selenium from industry wastewater.
Language
English
DOI
doi:10.7939/R3KS6J94X
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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