乐昌铅锌矿区蔬菜重金属含量与适种性评价

Heavy Metal Concentration and Plantability Assessment of Edible Vegetables in Lechang Lead-Zinc Mine Area

为了解重金属矿区蔬菜重金属含量,评价不同种类蔬菜的适种性,采集广东乐昌铅锌矿区菜地11种蔬菜和相土壤样品,用原子吸收分光光度计分析重金属Pb、Zn、Cu和Cd含量,用聚类分析法对11种蔬菜种类进行归类、结果表明,所有蔬菜Pb、Cd均超过国家标准,Cu和Zn基本未超标,土豆、豌豆和椰菜基本适合在当地继续种植.但要谨慎取用不同可食部分。

In order to know the heavy metal concentration in the vegetables in heavy metal mine area, and to assess the plantability of various kinds of edible vegetables, sampling was made of eleven edible vegetables and the relevant soils in Lechang lead-zinc mine area in Guangdong. Their concentrations of heavy metals such as Pb, Zn, Cu and Cd were analyzed with atomic absorption spectrophotometer, and the eleven edible vegetables were clustered by clustering analysis method. The results indicate that both Pb and Cd concentrations in all these vegetables exceed those specified in the related national standard while Cu and Zn concentrations are basically within the standard limits. Potato, pea and broccoli can be continuously planted locally, and however, care should be taken in taking their edible parts.