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Permanent link (DOI): https://doi.org/10.7939/R34M4T

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Water-Dispersible Magnetic Particle-Graphene Oxide Composites: Synthesis, Characterization and Application in the Removal of Selenium Oxyanions Open Access

Descriptions

Other title
Subject/Keyword
graphene oxide
selenium
magnetic nanoparticle
adsorption
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Fu, You
Supervisor and department
Qingxia (Chad) Liu
Hongbo Zeng
Examining committee member and department
Hongbo Zeng (Chemical and Materials Engineering)
Natalia Semagina (Chemical and Materials Engineering)
Qingxia (Chad) Liu (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2014-01-27T14:57:52Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
Selenium is toxic in excess with a high mobility in water. Existing adsorbents only show some removal capacity for selenite but perform poorly (typical removal percentage < 50 %) for selenate, the more bioavailable and soluble species. In this thesis, two Magnetic particle-Graphene Oxide composites (MGOs) were synthesized, characterized and applied to selenium removal from simulated water, with an significant removal percentage of > 99.9 % for selenite and 80 – 95 % for selenate at pH ~ 6 within 10 seconds. Acidic pH and low temperature could enhance the selenium adsorption on MGOs. It is proposed that the selenium adsorption on MGOs involves the formation of inner-sphere and outer-sphere complexes. MGOs can be separated effectively under an external magnetic field and recycle. Our results show that MGOs composites have excellent removal capability of selenite and selenate from simulated water and can be applied for the removal of selenium from wastewater.
Language
English
DOI
doi:10.7939/R34M4T
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. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. 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.
Citation for previous publication
A version of chapter 3 has been submitted for publication. Y. Fu, J. Wang, Q. Liu, H. Zeng 2013. Carbon (under review).A version of chapter 4 has been submitted for publication. Y. Fu, J. Wang, Q. Liu, H. Zeng 2013. Environmental & Energy Science (under review).

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