基于PMF模型的柴河铅锌尾矿库周边农田土壤重金属源解析

Source Apportionment of Heavy Metals in Farmland Soil Around Chaihe Lead-Zinc Tailings Reservoir Based on PMF Model

以开原市柴河铅锌尾矿库周边农田土壤为研究对象,测定了样品中八种常规重金属的含量,对分析数据进行评价,并在此基础上结合正定矩阵因子(PMF)受体模型,定量解析了农田土壤重金属的来源。结果表明:重金属的均值范围为1.61~597.55 mg/kg。根据正定矩阵因子分解模型解析结果,将因子1判定为铅锌矿污染源;将因子2判定为自然源;将因子3判定为尾矿库源;将因子4判定为交通和农业的混合源。

Taking the farmland soil around Chaihe lead-zinc tailings pond in Kaiyuan city as the research object,eight heavy metal contents in the samples were determined,and the test data were evaluated.On this basis,combined with the positive definite matrix factor(PMF)receptor model,the sources of heavy metals in farmland soil were quantitatively analyzed.The results showed that the average range of heavy metals was 1.61~597.55 mg/kg.According to the analytic results of positive definite matrix factorization model,factor 1 is determined as the pollution source of lead-zinc mine;factor 2 is determined as the natural source;factor 3 is determined as the tailings reservoir source;factor 4 is determined as the mixed source of transportation and agriculture.