潼关县金矿排水沟周围土壤重金属研究

以潼关县李家金矿废水沟周围土壤及田地土壤为研究对象,测定土壤受重金属污染的种类及程度,以便确定重金属富集植物种类,建立人工湿地生态系统.结果表明:距排放点不同距离不同深度的土壤样品中As、Hg、Cd 3种重金属含量均超过国家土壤重金属含量的最高限值,其中,As最高含量达99mg/kg,Hg最高含量达为59mg/kg,Cd最高含量达132mg/kg;重金属Cu在土壤表层中的含量较高,而深层土壤中含量较低;金属元素Zn的含量均在国家土壤重金属含量的允许范围内;在所有土壤样品中均检测到放射性元素Rb,其含量为50～90mg/kg.

The research on the soil heavy metal around gold mine drainage in Tongguan County

In order to study the heavy metal pollution degree and type,chose the survival plant species,and established the artificial wetland ecosystem,different kinds of heavy metal concentration in the soil of the drainage and the field around the gold mine in Tongguan County were determined.The test results indicated that the heavy metal As,Hg and Cd contents in the different distance and different depth soil samples all exceed the highest soil heavy metal content standard,and the highest content of As was 99 mg/kg,Hg is 59 mg/kg,and Cd was 132 mg/kg.The heavy metal Cu content in the surface soil was higher,while lower in deep soil.Both of the Zn content in the surface and deep soil were within the permitted soil heavy metal content standard.The radioactive elements Rb was detected in all soil samples,and its content ranged from 50 mg/kg to 90 mg/kg.