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Permanent link (DOI): https://doi.org/10.7939/R3K94R

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Fundamental Understanding of the Flocculation of Mineral Tailings in High Salinity Water Open Access

Descriptions

Other title
Subject/Keyword
Surface forces
Polymer bridging
Polymer flocculants
Tailings treatment
Solution salinity
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Ji, Yaguan
Supervisor and department
Liu, Qingxia (Department of Chemical and Materials Engineering)
Zeng, Hongbo (Department of Chemical and Materials Engineering)
Examining committee member and department
Liu, Qingxia (Department of Chemical and Materials Engineering)
Zeng, Hongbo (Department of Chemical and Materials Engineering)
Siddique, Tariq (Department of Renewable Resources)
Department
Department of Chemical and Materials Engineering
Specialization
Materials Engineering
Date accepted
2013-01-26T19:57:20Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
In this study, the effect of three polymer flocculants, polyacrylamide (PAM), Magnafloc 1011 (MF) and Al(OH)3-polyacrylamide (Al-PAM), on the settling of mineral freshwater and saline tailings was investigated. The settling of tailings significantly depends on solution salinity, polymer flocculant type and dosage. MF was identified as the most efficient flocculant among the three polymers to enhance the settling of freshwater and saline tailings. The flocculation mechanism of MF was further studied through model clay (i.e. kaolinite) under controlled solution conditions. The maximum initial settling rate (ISR) of kaolinite was found to increase with the addition of NaCl and CaCl2 at the cost of higher MF consumption. Using multiple advanced techniques, the interaction between MF molecules and clay particles were probed. The results indicate that the different settling behaviors of MF treated tailings of various salinities were mainly due to the change of polymer conformations and polymer-particle interactions in the suspensions.
Language
English
DOI
doi:10.7939/R3K94R
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. Ji, H. Zeng, Q. Liu 2013. Colloids and Surfaces A: Physicochemical and Engineering Aspects (under review).

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File author: Yaguan Ji
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