金昌市郊农田土壤重金属的地球化学基线值研究

Study on the Geochemical Baseline Value of Heavy Metals in Farmland of Jinchang Suburb

文章采用相对累计频率分析确定了金昌市郊农田土壤中Cu、Cd、Pb、Zn、Ni的地球化学基线值,其结果依次为89.6 mg/kg、0.113 mg/kg、37.3 mg/kg、90.2 mg/kg、95.5 mg/kg,其中,Cd的基线值比甘肃省土壤背景值略低,Cu、Pb、Zn和Ni的基准值均高于甘肃土壤背景值。

Useing relative analysis,the geochemical baseline values of Zn, Ni, Pb, Cu, and Cd were determined by sampling the topsoil from suburb croplands in Jinchang city. The baseline values were Cu 89.6 mg/kg, Cd 0.113 mg/kg, Pb37.3 mg/kg, Zn 90.2 mg/kg, Ni 95.5 mg/kg. The baseline value of Cd was slightly lower than its value in background of Gansu province, the baseline value of Cu, Pb,Zn, Ni were higher than their values in background of Gansu province respectively.