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Permanent link (DOI): https://doi.org/10.7939/R30C4ST0F

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Dendrimer Functionalized Graphene Oxide for Selenium Removal Open Access

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Other title
Subject/Keyword
graphene oxide
selenium
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Xiao, Wenda
Supervisor and department
Liu, Qingxia (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Examining committee member and department
Liu, Qingxia (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Trivedi, Japan (Civil and Environmental Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2015-09-30T08:23:12Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
Selenium is an essential trace element nutrient for human life, but it can be extremely toxic if taken excess. Various adsorbents have been applied for the removal of selenium from water but performed poorly in the removal of Se (VI), which is more bioavailable and more difficult to remove. Herein, we reported a new method to prepare poly (amido amine) functionalized graphene oxide (PAMAM-GO) with different generations (GO-G0 to GO-G4). The resulting products were applied in selenium removal from simulated water, showing an increasing capacity with increasing generation. The 4th generation of PAMAM-GO (GO-G4) shows a removal capacity of 60.9 mg g-1 in Se (IV) and 77.9 mg g-1 in Se (VI) at pH 6. The adsorption mechanism is attributed to the electrostatic interaction between selenium oxyanions and the adsorbents, proved by the effects of initial pH on removal capacity and zeta potential measurements.
Language
English
DOI
doi:10.7939/R30C4ST0F
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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