青海省湟水流域土壤重金属风险评价研究

Risk Assessment of Soil Heavy Metal on Qinghai Plateau Huangshui Basin

[目的]对青海高原湟水流域土壤重金属进行风险评价。[方法]采用潜在生态危害系数法,对土壤重金属进行风险评价。[结果]青海高原湟水流域大多数农田土壤中镉、汞、砷、铅、铬、铜6项重金属属于低度生态危害,少数地区镉、汞属于中等生态危害。[结论]青海省湟水流域少部分地区土壤重金属存在着潜在的生态危害,对土壤具有潜在影响的重金属元素主要是Hg、Cd。

[Objective] Risk assessment of soil heavy metal on Qinghai plateau Huangshui basin was carried out.[Method] The potential ecological harm coefficient method was adopted to assess the risk of soil heavy metal.[Result] Cd,Hg,As,Pb,Cr,Cu in most regions belonged to developing ecological harm,and Cd,Hg a few areas belonged to medium ecological harm.[Conciusion] There is a potential ecological harm of soil heavy metal on small part of Qinghai plateau Huangshui basin.The heavy metal elements which have the potential impacts on the soil are mainly Hg,Cd.