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Permanent link (DOI): https://doi.org/10.7939/R3Z892M13

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Evaluating the transport and removal of coated microspheres as Cryptosporidium surrogates in drinking water filtration Open Access

Descriptions

Other title
Subject/Keyword
Drinking water treatment
Cryptosporidium
Glycopolymer-modified microsphere
Filtration
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Seaman, Jeffrey
Supervisor and department
Liu, Yang (Environmental Engineering)
Examining committee member and department
Craik, Steve (Environmental Engineering)
Buchanan, Ian (Environmental Engineering)
Liu, Yang (Environmental Engineering)
Department
Department of Civil and Environmental Engineering
Specialization
Environmental Science
Date accepted
2015-09-29T09:40:48Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
A glycopolymer-modified microsphere surrogate for Cryptosporidium was developed, characterized, and used in filtration experiments. Several surrogates were investigated (yeast, unmodified microspheres, glycoprotein-modified microspheres), and then compared to Cryptosporidium oocysts. Glycopolymer-modified microspheres were the most cost effective option, with a size and surface charge similar to viable Cryptosporidium. The effect of three common polyelectrolyte coagulant aids on glycopolymer-modified microspheres was investigated. Cationic epichlorohydrin amine (ECHA) was determined to be the most effective with regards to charge reversal and attachment to silica surfaces as evaluated by quartz crystal microbalance with dissipation monitoring (QCM-D). The glycopolymer-modified microspheres were then used in pilot-scale filtration experiments. Results indicate that influent conditions play an important role in the transport and removal of glycopolymer-modified microspheres, with increased turbidity having a negative impact on log-removal. Increased flow rate was also observed to have a negative impact on log-removal.
Language
English
DOI
doi:10.7939/R3Z892M13
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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