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Please use this identifier to cite or link to this item: http://http://dspace.futminna.edu.ng/jspui/handle/1/4405

Title: BUFFERING CATION PERMEATION BY MINERAL BARRIER
Authors: Agbenyeku Emem-Obong, Emmanuel
Muzenda, Edison
Msibi Mandla, Innocent
Keywords: Zeolite
leachate
Membrane
Cations
Issue Date: 19-Oct-2015
Abstract: Laboratory test of failed membrane in a geo-composite barrier under leachate permeation through a circular defect was investigated using a bespoke apparatus. Zeolitic mineral barrier-24 mm thick, polythene plastic (PP)-2 mm thick with 5 mm centralized puncture simulated the circular failure in the membrane and a 225 mm thick mineral layer as buffering strata (BS) comprised the experimental setup. The bespoke device-160 mm diameter coupled to a hydraulic pressure frame imposed up to 150 kPa pressure to the barrier. Permeant through the barrier-BS system was evaluated for tests under varying pressures. In this study, measured permeation rates for conditions of good interface contact were found to be valid but unachievable for conditions of perfect contact. However, tests results displayed significant reduction in permeation rates with increased pressure, p, on the system. This is conceivably due to reduced system transmissivity, θ, and densification of the zeolitic barrier. After compactibility tests, cation concentrations revealed permeation through the failed membrane-mineral barrier, nevertheless, a fairly reasonable buffering ability of the zeolitic mineral to permeating cations was observed.
URI: http://http://dspace.futminna.edu.ng/jspui/handle/1/4405
Appears in Collections:IEC 2015

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