【摘要】 [目的]了解广西稻田土壤重金属污染现状,为稻田重金属污染防治提供科学依据。[方法]采集广西水稻主产区农田50个0~20 cm耕层土壤样品,分析其重金属镉、铅、砷含量,分别采用单因子指数法和Hakanson的潜在生态风险指数法对土壤环境质量和土壤潜在生态风险进行评价。[结果]广西稻田土壤中总镉、总铅、总砷的含量分别为0.941、26.46和10.16 mg/kg。有54.0%土壤样品中的镉含量、2.0%土壤样品中的砷含量高于国家土壤环境质量的二级标准值。稻田土壤中的镉为高生态风险。[结论]广西稻田土壤主要受重金属镉的污染。更多还原

【Abstract】 [Objective]The purpose of this investigation was to understand the status of heavy metal pollution in paddy soil of Guangxi and to provide a reference for heavy metal pollution control. [Method]The contents of Cd,Pb,and As of 50 soil samples of cultivation layer (0- 20 cm),which were taken from main rice producing areas of Guangxi,were determined. The environment quality of soil was assessed with the single factor index and the potential ecological risk of paddy soil was evaluated with the potential ecological risk index of Hakanson. [Result]The mean contents of Cd,Pb,and As in paddy soil samples were 0. 941,26. 46 and 10. 16 mg / kg,respectively. The Cd content of 54. 0% soil samples and the As content of 2. 0% soil samples was higher than the standard II of the environment standard quality for soils. Cd in paddy soil had high potential ecological risk. [Conclusion]Heavy metal pollution in paddy soil of Guangxi was main Cd pollution,更多还原