Reduced leachability of heavy metals in soil treated with cement
Portland cement was used to reduce metal leachability in trace metal contaminated soil. Two experiments were performed, one adding 0 to 15％ of the soils weight in cement, and the other 0 to 1％. For the first experiment, different water to cement ratios were used to investigate the effect on metal leachability. For the second experiment, treated samples were acidified with a 60:40 mixture of sulphuric and nitric acid as in the typical acid rain. All treated soils were then submitted to TCLP leaching test to assess metal leachability. Only the high amounts of cement added significantly reduced metal leachability. Water to cement ratio had a significant effect on cadmium only. Cement treatment reduced the concentration of cadmium and lead in leachate to within the Canadian regulatory limit with 8％ and 5％ cement added, respectively.
Portland cement trace metals leachability remediation
R. Lambert B. Hale R. Fung D. Lewis R. Willes T. Dan
Department of Land Resources Sciences, University of Guelph, Guelph Ontario, Canada, NlG 2Wl ph. ca, Cement Association of Canada, Toronto, Ontario, Canada, M3B 3K4 Ontario Centre of Excellence, Toronto, Ontario, Canada, M5J 2L6 Cherokee Canada inc, Toronto, Ontario, Canada, M5H 3L5 5 Jacques Whitford, Waterloo, Ontario, Canada, N2J 1P8
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
913-914
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）