紫色土区重金属污染与迁移

The Dollution and Transference of Heavy Metals in Purple Soil Area

采用野外调查、室内分析和定期监测相结合的方法,研究了紫色土区Cu、Pb、As、cd的污染来源与迁移。结果表明,紫色土区已存在重金属污染问题,尤以矿区和大城市近郊最为明显。污染途径主要是大气降尘、废水灌溉、城市垃圾和农药的施用等。大气降尘带来的重金属有Hg、Cd、Pb、As;农药施用掺入土中的重金属为Pb、As;废水中以Cd、Cr为主;渣肥以Cu突出。重金属迁移受其种类,土壤性质、污染途径和其它环境条件的影响。

The source and transference of Cu, Pb, As, Cd in purple soil area was studied by using the methods of investigation,analysis combined with regular monitoring. The result showed that the heavy metal pollution have existed in purple soil area,and it was most obviously at the mining areas and big city suburbs. The sources of pollution were air particle pollution, irrigation with waste water,the use of municipal refuses and the pesticides. Air particles brought about Hg, Cd,Pb and As,while pesticides—Pb,As, Waste water— Cd,Cr,and the refuses—particularly Cu. The transference of heavy metal was effected by the variety of heavy metals, the nature of soils, the pollution sources and other environmental conditions.