Journal article
Removal of copper and zinc from ground water by granular zero-valent iron: A dynamic freeze-thaw permeable reactive barrier laboratory experiment
TM Statham, KA Mumford, JL Rayner, GW Stevens
Cold Regions Science and Technology | Published : 2015
Abstract
Permeable reactive barriers (PRBs) use solution-media interactions for contaminant removal from ground and surface waters. When located in a cold region subjected to freeze-thaw cycling, these liquid-solid phase interactions may be detrimental to PRB performance. This study presents a laboratory based assessment of contaminant removal using granular zero-valent iron (ZVI) under freeze-thaw conditions. Freeze-thaw induced changes to simulated PRBs, contained within Darcy boxes, subjected to 0, 21 and 42 freeze-thaw cycles were assessed using the flow of both reactive and conservative solutions. The reactive contaminants, Cu2+ and Zn2+ ions, were removed from the pore water during solution flo..
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Funding Acknowledgements
The authors wish to thank Laura Gordon and Damian Gore for XRD analysis and interpretation, Roger Curtain for his assistance to complete the SEM and EDS analyses and Andrew Lee for the photography work. The financial support of the Australian Antarctic Science Grant 4029 is gratefully acknowledged. T.S. also acknowledges the support of an Australian Postgraduate Award. The Particulate Fluid Processing Centre (PFPC) and the Advanced Microscopy Facility at the University of Melbourne are both acknowledged for the equipment support. The manuscript was greatly improved by the comments provided by Bradley Patterson and Gregory Lekmine during CSIRO ePublish review and by anonymous reviewers at Cold Regions Science and Technology.