选冶矿厂周边农田中几种农作物的重金属污染状况

Pollution of Heavy Metals in Several Crops in Farmland Around the Concentrator and Smelter

对云南某矿区选厂、冶炼厂周边农田中几种农作物及其根际土壤重金属含量进行了研究。结果表明,矿区周边农田中农作物根际土壤中除Cr元素外,Pb、Cd和Zn元素含量严重超过国家土壤二级标准,污染指数分别为1.28～6.79、40.83～377.6和2.71～25.03;矿区甘蔗食用部分Pb、Cr和Zn的含量分别超标11.6、18.7和99.78倍,青菜食用部分Pb、Cr和Zn含量分别超标7.75、1.8和64.3倍,豌豆食用部分Pb和Zn分别超标1和45.44倍。

The heavy metal contents in several crops and their rhizosphere soil around the concentrator and smelter of one mine area was studied. The results showed that except Cr the contents of Pb,Cd and Zn in rhizosphere soil of crops in the mine area were all seriously exceed the class two national standard for soils,and their pollution indexes were 1.28-6.79,40.83-377.6 and 2.71-25.03 resp. The contents of Pb,Cr and Zn in edible part of sugarcane overed standard 11.6,18.7 and 99.78 times resp. and that of Pb,C r and Zn in edible part of brassica chinensis overed standard 7.75,1.8 and 64.3 times resp. and that of Pb and Zn in edible part of pea overed standard 1 and 45.44 times resp.