农业环境科学学报2009，Vol.28Issue(10)：2050-2056,7.
固化剂对土壤中重金属的稳定作用及其在河岸固化护坡中的应用研究
Stabilization of Heavy Metals by A Self-developed Soil Binder and Its Application in Ecological Embankment Engineering of Riverbank
摘要
Abstract
The present study aimed to evaluate the stabilization of soil heavy metals by a self-developed binder named GSS-02 which would become a standard for the implementation of riverbank solidification engineering. Ordinary Portland cement (OPC) and GSS-02 were mixed with soil samples at various ratios and the efficiency of stabilization of Cu, Zn, Cr and Ni in soils was evaluated by the US EPA TCLP toxicity test. The unconfined compressive strength of the solidified soil was also measured to estimate its physical properties. Addition of OPC or GSS-02 increased the pH value of the leachate up to a maximum of 7.0 and there was a clear positive relationship between the amount added and the leachate pH value. OPC or GSS-02 had a positive effect on stabilization of Cu, Zn and Ni in soils thereby decreasing their concentrations in the leachate by 3~7 fold and simultaneously activated Cr. Both additives increased the compressive strength of the solidified body. When the additive ratio was less than 10% the compressive strength of the solidified body treated with GSS-02 was greater than that with OPC treat-ment. The opposite effect was observed when the additive ratio was increased, resulting in conditions favorable for plant growth. This was the main advantage of the binder system over OPC when applied to soil bioengineering. The laboratory study suggests that the binder is suitable for soil solidification engineering and has been applied in riverbank ecological restoration engineering at Nanhui District in Shanghai.关键词
土壤同化/固化剂/稳定作用/浸出毒性/无侧限抗压强度Key words
soil solidification/ binder/ stabilization/ leaching toxicity/ unconfined compressive strength分类
资源环境引用本文复制引用
张长波,罗启仕,付融冰,杨洁,章树久,李小平..固化剂对土壤中重金属的稳定作用及其在河岸固化护坡中的应用研究[J].农业环境科学学报,2009,28(10):2050-2056,7.基金项目
国家"863"计划蓖大项目课题(2007AA06A401) （2007AA06A401）
上海市科委世博科技专项课题(06dz05810) （06dz05810）
