天水苹果土壤中重金属元素Pb、Cd、Cr含量的测定

Measurement of Heavy Metal Elements of Pb,Cd,Cr in Tianshui Apple-planting Soil

以甘肃省天水市麦积区花牛镇花牛村苹果种植地区某一果园的土壤为研究对象,采用火焰原子吸收光谱仪测定了土壤中重金属元素Pb、Cd、Cr的含量,各重金属元素的平均含量分别为:Pb平均含量为31.25mg·kg-1,Cd的平均含量为0.427mg·kg-1,Cr平均含量为24.75mg·kg-1.结果表明,该地区的土壤可以安全地进行农业生产,土壤中的重金属不会通过食物链的作用对人类健康形成威胁和危害.

The apple-planting area in Huaniu town, Tianshui is regarded as the research object. The content of heavy metal elements Pb, Cd, Cr in soil is determined by air-acetylene flame FAAS. The average contents of heavy metal elements are： the average content of plumbum is 31.25 mg · kg^-1 , the average content of cadmium is 0. 427mg · kg^-1 , and the average content of chromium is 24.75mg · kg^-1. The results show that the soil can be safe for agricultural production, and heavy metals in the soil don＇t threaten and harm to human health through the food chain.