上海郊区蔬菜重金属污染现状及累积规律研究

Study on pollution situation and enrichment regulations of some popular vegetables for heavy metals in Shanghai

对宝山区几种蔬菜不同部位中Cu、Zn、Pb、Cd和Cr等重金属的含量进行了研究,结果表明:叶菜类中重金属的含量高于根茎类和茄果类。对于同一植株蔬菜的不同部位来说,叶茎中重金属含量普遍低于根部。各蔬菜对重金属元素的富集顺序大体为:Cd大于Zn大于Cu大于Pb大于Cr。除Cu外,其他元素在各蔬菜中均有不同程度的超标现象。

This article investigated the characteristics of uptaking and accumulation of 5 heavy metals (Cu、Zn、Pb、Cd、Cr)in 10 vegetables,Baoshan district,Shanghai.The results indicate that the content of heavy metals in leaf vegetables was higher than that of root vegetables and gourds. In terms of different tissues of vegetables,the content of heavy metals in leaves and stems was lower than that in roots.The accumulation sequence of heavy metals in the vegetables was Cd>Zn,Cu>Pb>Cr.The contant of Zn、Pb、Cr、Cd in many vegetables exceeded that of official tolerance,Cu excepted.