石棉尾矿渣在土壤重金属及农药污染治理中的应用

石棉尾矿渣具有良好的孔道结构、较大的孔体积和较高的比表面积,是一种理想的吸附材料,在重金属和和有机污染等治理方面表现出巨大潜力。本文在对石棉尾矿渣的矿物组成、晶体结构、化学基团及理化性质进行分析的基础上,对其在重金属污染治理、农药污染治理、农药缓释助剂等方面的应用进行了汇总分析,并对应用中实际存在的问题进行了分析与探讨。指出天然石棉尾矿渣吸附能力不足、功能单一,对土壤结构、理化性质、微环境扰动较大的问题,应加强石棉尾矿渣酸浸改性及高温热解处理,以制备出吸附能力更强、功能更加丰富的石棉尾矿渣基功能材料;并指出了石棉尾矿渣在应用中的研究方向。

THE APPLICATION OF ASBESTOS TAILING RESIDUE IN HEAVY METAL AND PESTICIDE POLLUTION CONTROL IN SOIL

Asbestos tailing residue is a kind of absorption material with excellent pore structure，high pore volume and large specific surface area，which shows great potential in heavy metal and organic pollution governance． This paper，based on analysis of the composition，the mineral crystal structure，chemical groups and physic-chemical properties，summarized and analyzed the application of which on the governance of heavy metal pollution，pesticide pollution，pesticide release additives and so on，and discussed the practical problems in application． It is pointed out that the specific surface area and pore diameter of natural asbestos tail slag is relevantly small，and the structure of which is complex，the adsorption capacity is weaker，the function is not universal，emphasis should be put on acid /alkaline /intercalation modification on the natural asbestos tail residue in order to produce residue with higher performance; Suggestions were also given to further research on application of asbstos tailing residue on soil remediation