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本试验采集309份耕地土样,分析了土壤中铅含量水平。基于土壤地球化学基准值,利用地质累积指数和生态危害指数对耕地土壤中Pb污染累积特性和生态风险进行了评价。结果表明,成都平原耕地土壤中Pb含量差异较大,各区域土壤Pb含量顺序为新都>郫县>新津>温江>双流>都江堰>彭州>崇州>大邑>邛崃,所有样品均未超过《土壤环境质量标准》二级标准,土壤环境质量较好。地质积累指数而言,除新都和郫县为“中度污染”外,其余各区域均为“无-中度污染”。成都平原耕地Pb潜在生态风险均为低生态风险级。
This experiment collected 309 cultivated land samples, analyzed the level of lead in soil. Based on the soil geochemical baseline values, the cumulative characteristics and ecological risk of Pb pollution in arable soils were evaluated using the geo-accumulation index and ecological risk index. The results showed that the content of Pb in soils of cultivated soils in Chengdu plain differed greatly, and the sequence of Pb in soils of each area was Xindu> Lixian> Xinjin> Wenjiang> Shuangliu> Dujiangyan> Pengzhou> Chongzhou> Dayi> Soil environmental quality standards “two standards, better soil environmental quality. In terms of geo-accumulation index, except for Xindu and Juxian counties, which are ”moderately polluting“, the remaining regions are all ”none-moderately polluting". Potential ecological risk of cultivated land Pb in Chengdu Plain is low ecological risk level.