有机质在土壤重金属污染治理中的应用

根据对土壤重金属污染的严重性和目前国内外对此治理方法的分析，提出有必要在较大污染面积的土壤上实行有机质改良；还阐述了有机质对重金属污染净化作用的主要机制及调控措施。有机质改良法兼顾了经济效益、环境效益及社会效益三者的统一，是土壤重金属污染治理的一个最佳方向之一。

Application of Organic Matters in the Improvement of Soil Polluted by Heavy Metals

Based on review of the seriousness of soil pollution by heavy metals and the studies on its improvement at present in the world,this paper puts forword the necessity of using organic matters to improve the contaminated soils by heavy metals in the large areas.The purification mechanism with the organic matters and the methods of controling soil pollution by heavy metals were also described.The organic matters improvements hold the economical efficiency,the environmental efficiency and the social efficiency concurrently,its one of the best directions of decreasing soil pollution by heavy metals.