摘要
为了解泸州市蔬菜种植地土壤重金属的污染状况,分析了泸州市蔬菜地土壤中的p H值、有机质以及重金属(Cd、Hg、As、Pb、Cr、Cu)含量,并用单因子污染指数法、综合污染指数法、地积累指数法以及潜在生态危害指数法对该地区土壤重金属污染状况以及生态风险进行评价。结果表明,该地区土壤中Cd、Hg、As、Pb、Cr、Cu的平均含量水平未超过四川土壤背景值土壤。利用农业行业标准(NY/T391-2000)中土壤污染元素的浓度限值进行评价,泸州市蔬菜种植地土壤重金属均未超标。地积累指数及潜在生态危害综合指数评价结果表明,泸州市蔬菜种植地土壤中重金属污染处于轻微污染或无污染以及轻微的潜在生态风险水平,Cd的潜在生态危害系数最高,贡献最大。
In order to understand the heavy metal pollution situation in soil of vegetable filed in Luzhou, this paper analyzed the pH value, organic matter and heavy metals （Cd, Hg, As, Pb, Cr, Cu） content in soil Pollution characteristics and ecological risk of heavy metals in soils were evaluated by Single factor pollution index method, integrated pollution index method, geo -accumulation index （Igeo） method and potential ecological risk index （RI） method. The results indicated that the average concentrations of Cd. Hg. As. Pb. Cr. Cu were under the soil background values of Sichuan. Based on the National Agriculture Industry Standard for Soil, all heavy metal concentrations were under the limit. Evaluation results of geo - accumulation index and potential ecologieal risk index indicated that the soils were at the slight ecological hazard level, Cd has the highest coefficient of potential ecological hazard.
出处
《四川环境》
2017年第3期127-132,共6页
Sichuan Environment
关键词
泸州
重金属
土壤
生态风险
Luzhou
heavy metal
soil
ecological risk
