杨凌示范区蔬菜中重金属污染分析与评价

Analysis and Evaluation on Heavy Metal Pollution of Vegetables in Yangling Demonstration Zone

调查了杨凌示范区4类9种蔬菜重金属铅、镉、铬、铜、锌的污染现状。结果表明:铬对蔬菜的污染程度最为严重,其次为铅,镉也有一定程度的污染,铜和锌均有检出,但含量处于安全范围。叶菜类蔬菜中重金属含量超标比较严重,在5种重金属中铬污染超标最严重。

The contamination level of Pb,Cd, Cr, Cu and Zn in 36 kinds of vegetables in Yangling Demonstration Zone were investigated. The results showed that the most serious pollution in vegetable was Cr,and then were Pb and Cd,Cu and Zn did not exceeded national standard level although were determined. The evaluation results showed that the contamination of heavy metals in leaf vegetables was severe,the contamination of Cr in vegetables was severer than that of other 4 heavy metals.