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Arsenic Stabilization of Contaminated Soil of a Smeltery in Shenyang

YAO Min1,LIANG Cheng-hua1,DU Li-yu1,CHEN Hui2,SHAO Chun-yan2(1.School of Land and Environment,Shenyang Agriculture University,Shenyang 110161,China;2.Shenyang Academy of Environmental Science,Shenyang 110016,China)  
Stabilization represents a comparatively cost-effective treatment alternative for metal-contaminated soil.Taking a smeltery in Shenyang,Liaoning Province as research object,several alkali chemicals were added to increase the soil pH and reduce leaching toxicity of arsenic in soil impacted by heavy metals.Results indicated that inclusion of sulfured matrium and sodium carbonate chemicals increased soil pH without reducing arsenic leaching toxicity,and inclusion of calcium carbonate and multi-sulfured calcium had no clear effect on stabilization of soil arsenic.The best effect was calcium oxide,which reduced arsenic leaching toxicity under Dangerous Waste Toxicity Leaching Standard(GB5085.3-1996).
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