重庆市某茶园土壤和茶叶中重金属的监测与污染评价

测定了重庆市某茶园土壤和鲜茶叶中的重金属Pb，Cd，Cr，Cu，Hg和As含量，并结合茶园土壤和茶叶的卫生质量标准，采用单因子污染指数法和Nemerow污染指数法进行了污染评价。结果表明：该茶园土壤和鲜茶叶中这几种重金属含量均较低，但Cd的含量稍高；单因子污染指数和Nemerow污染指数基本上均小于1.0，表明茶叶和茶园土壤基本上未受这6种重金属的污染，茶叶和茶园土壤环境质量总体良好。茶叶对土壤中Cd、Cu和Hg的富集能力较强。

Monitoring of Heavy Metals in Soil of a Tea Garden and Teas in Chongqing and Pollution Evaluation

Six heavy metal ions including Pb,Cd,Cr,Cu,Hg and As were determined in soil of a tea garden in Chongqing and tea samples.Combining with the health quality standards of the soil of tea garden and tea,we evaluated the pollution situation using the single factor pollution index and Nemerow pollution index.The results showed that the amounts of Pb,Cr,Cu,Hg and As were low,but the amount of Cd was a little high.The single factor pollution indexes and Nemerow pollution indexes were all below 1.0.It indicted that the soil in tea garden and teas are basically not polluted by the six heavy metals,the qualities of tea and soil environment of the tea garden are quite good on the whole.The capability of enrichment of Cd,Cu and Hg in tea was strong.