昆明城郊公路旁侧四季豆及根系土壤重金属污染研究. (Chinese)

Heavy Metal Pollution in Kidney Bean and Its Root Soil near Suburban Road in Kunming. (English)

[Objective] Field investigation and sampling of the soil and kidney beans in the farmland beside the Songma section of Kunming Highway X013, to determine and analyze the content of Pb, As and Cu in the soil and kidney beans. [Method] Using the comprehensive pollution index method The heavy metal pollution in the soil was evaluated. [Result] At a distance of 5 m from the road, the Pb-excess rate of soil and kidney beans were both 100%, and both were polluted by Pb; at a distance of 20 m from the road, the soil pollution level reached the warning line. Slightly polluted. At a distance of 50 m from the road, the soil and string beans are not polluted by Pb and As, but the soil is seriously polluted by Cu, showing a trend of decreasing with the increase of the distance from the road. Cu pollution. [Conclusion] Pb in green beans is mainly caused by automobile exhaust emissions. It is recommended that green beans be planted 50 m away from the road. The content of As in green beans is very small and is not affected by changes in distance from the road. Soil The Cu pollution is serious, but the kidney beans are not contaminated by Cu, indicating that the soil Cu has not migrated to the edible part of the kidney beans. [ABSTRACT FROM AUTHOR]

[目的]对昆明公路X013松马段旁侧农耕地土壤及四季豆进行野外调查采样,测定分析土壤及四季豆中Pb、As和Cu的含量.[方法]采用综合污染指数法对四季豆和土壤中重金属污染状况进行评价.[结果]距离公路5 m处,土壤和四季豆Pb超标率均为100％,都受到Pb污染;距公路20 m处,土壤污染等级达到警戒线,四季豆为轻度污染,距公路50 m处,土壤和四季豆均未受到Pb和As的污染,但土壤受Cu污染严重,呈现出随着离公路距离的增加而减小的趋势,四季豆均未受到Cu污染.[结论]四季豆中的Pb主要由汽车尾气排放造成,建议四季豆种植要安排在距公路50 m以外.四季豆中As的含量非常小,不受距公路距离远近变化影响.土壤Cu污染严重,但四季豆未受到Cu污染,说明土壤Cu没有迁移到四季豆可食用部分. [ABSTRACT FROM AUTHOR]

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