非金属天然矿物吸附材料在土壤重金属污染修复中的应用

Application of non-metallic natural mineral adsorption materials in remediation of heavy metal pollution in soil

随着土壤重金属污染日趋严重,非金属天然矿物吸附材料以其低价、无二次污染的独特优势,在土壤修复中得到应用。本文在介绍我国土壤重金属污染现状、天然矿物材料吸附性能的基础上,回顾了该类吸附材料的应用发展历程,着重突出了应用该吸附材料作为反应介质的渗透反应墙(PRB)、地球化学障(GB)技术,而水土一体化联合修复是一种较好的修复方式。对天然矿物吸附材料在土壤重金属污染修复中的应用研究提出了一些展望,包括吸附转化、影响条件、微观对比、多技术联合等。

With the increasing pollution of heavy metals in soil,non-metallic natural mineral adsorbents have been applied in soil remediation because of their unique advantages of low price and no secondary pollution.On the basis of introducing the present situation of soil heavy metal pollution and the adsorption properties of natural mineral materials in China,we review the application and development of this kind of adsorption materials.The permeable reactive barrier(PRB),and geochemical barrier (GB) technique using the adsorbed material as the reaction medium is emphasized,and the combined remediation of soil and water is a better method.Some prospects for the application of natural mineral adsorption materials in remediation of soil heavy metal pollution were put forward,including adsorption and transformation,influence conditions,microcosmic comparison,multi-technology combination and so on.