Effect of electrolyte concentration in process water on flocculation
department or school: Applied Science, Faculty of
department or school: Mining Engineering, Keevil Institute of
data provider: DSpace
degree campus: UBCV
creator: Moreno Chavez, Jose Ricardo
issued: 2018-08-23T16:10:08Z
issued: 2018
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: The effect of electrolyte concentration and potential determining ions on the coagulation and flocculation of illite, dolomite, and illite-dolomite mixture suspensions was investigated. Electrokinetic measurements, settling rate tests, and viscosity measurements were performed to examine the stability of these mineral suspensions and to characterize flocculants under various physico-chemical conditions. Two flocculants: A-100 anionic polyacrylamide (PAM) and polyethylene oxide (PEO) were used in the flocculation tests and viscosity measurements. The settling rate tests confirmed the polyacrylamide flocculant’s wide range of functionality in solid-liquid separation unit operations by flocculating mineral suspensions under nearly all tested conditions. The tests revealed that polyethylene oxide does not flocculate dolomite under any tested conditions. The obtained viscosity results corroborated that the conformation of PAM macromolecules in water is very sensitive to electrolyte concentration; on the other hand, the conformational state of PEO macromolecules is not affected by ionic strength. The intrinsic viscosity measurements suggest that the unattainable flocculation of dolomite suspensions with PEO must result from poor adsorption of this flocculant onto the carbonate. In both tested cases, with PAM and PEO, the relationship between coagulation and flocculation was not confirmed.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/66911
note: EFFECT OF ELECTROLYTE CONCENTRATION IN PROCESS WATER ON FLOCCULATION by Jose Ricardo Moreno Chavez B. Eng., Escuela Superior Politecnica del Litoral, 2015 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in The Faculty of Graduate and Postdoctoral Studies (Mining Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) August 2018 © Jose Ricardo Moreno Chavez, 2018 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis/dissertation entitled: Effect of electrolyte concentration in process water on flocculation submitted by Jose Ricardo Moreno Chavez in partial fulfillment of the requirements for the degree of Master of Applied Science in Mining Engineering Examining Committee: Dr. Janusz Laskowski, Mining Engineering Supervisor Dr. Marek Pawlik, Mining Engineering Supervisory Committee Member Dr. Maria Holuszko, Mining Engineering Supervisory Committee Member Additional Examiner Additional Supervisory Committee Members: Supervisory Committee Member Supervisory Committee Member iii Abstract The effect of electrolyte concentration and potential determining ions on the coagulation and flocculation of illite, dolomite, and illite-dolomite mixture suspensions was investigated. Electrokinetic measurements, settling rate tests, and viscosity measurements were performed to examine the stability of these mineral suspensions and to characterize flocculants under various physico-chemical conditions Two flocculants: A-100 anionic polyacrylamide (PAM) and polyethylene oxide (PEO) were used in the flocculation tests and viscosity measurements. The settling rate tests confirmed the polyacrylamide flocculant’s wide range of functionality in solid-liquid separation unit operations by flocculating mineral suspensions under nearly all tested conditions. The tests revealed that polyethylene oxide does not flocculate dolomite under any …
has type: Thesis/Dissertation
date issued: 2018-09
is shown at: 10.14288/1.0371215
language: eng
degree discipline: Mining Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/66911