新昌县不同蔬菜重金属污染研究

通过对新昌县蔬菜生产基地6种蔬菜141个样品中的重金属元素As、Hg、Cd、Cr、Pb的含量进行调查分析,初步了解不同蔬菜重金属污染状况,并进行了蔬菜重金属污染安全评价。研究结果表明,不同品种蔬菜均不同程度地受到重金属污染,蔬菜中As、Hg、Cd、Cr、Pb的平均含量分别为0.029 4、0.007 4、0.037 3、0.153、0.098 6 mg/kg,均未超出国家蔬菜食品卫生标准;重金属综合污染程度顺序为青菜萝卜茄子茭白黄瓜四季豆,Hg、Cr和Pb是新昌县蔬菜中的主要污染元素;各类蔬菜的综合污染指数均小于1,表明各蔬菜是安全的。

Research of Heavy Metal Pollution in Different Vegetables in Xinchang County

Based on the investigation and analysis of five heavy metals (As, Hg, Cd, Cr, Pb) contents in 141 samples of 6 kinds of vegetables from the vegetable production bases in Xinchang, the paper studied the pollution condition of heavy metals from different vegetables, and implemented a safe assessment on heavy metal pollution of vegetables. The results showed that different vegetables were polluted by heavy metals in different degree, and the average contents of As, Hg, Cd, Cr and Pb in vegetables were 0.029 4, 0.007 4, 0.037 3, 0.153 0 and 0.098 6 mg/kg, respectively, which were all below the national standards of food hygiene and vegetable. The heavy metal pollution levels were in order of green vegetable>radish>eggplant>Zizania aquatica>cucumber>kidney bean, and Hg, Cr and Pb were the major pollutant elements of vegetables in Xinchang. All the pollution indexes of the heavy metals in vegetables were less than 1, so it showed that all the tested vegetables were safe.