CGRG Bibliography of Canadian Geomorphology
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Author : Buckland, D.G.
Date : 1999.
Title : Electrokinetic sedimentation of Welland River sediment
Publication : Unpublished Ph.D. dissertation. University of Western Ontario, London.
Issue :
Page(s) : 143 p.
Abstract
This thesis presents the results of an experimental study of electrokinetic sedimentation conducted on contaminated sediment dredged from the Welland River, Ontario, Canada. The characterization of the sediment and the design of sedimentation columns are discussed, followed by a study on four parameters influencing electrokinetic sedimentation, including the initial solid concentration, electric field intensity, intermittent current, and the use of coagulants. The classification of the sediment included the physical, chemical, electrical, and mineralogical properties prior to electrokinetic treatment. Two sets of tests were performed using intermittent current (switching the power supply on and off at predetermined intervals). The first set of tests involved different on-off times while keeping the power consumption coefficient constant at 60%. The second set of tests consisted of using a 90 second on time interval while varying the off time interval. This produced power consumption coefficients ranging from 40% to 80%. From a series of jar tests, FeCl [sb3] was found to be the most effective coagulant for the Welland River sediment.
Bibliography of Canadian Geomorphology