东莞市某菜地土壤重金属污染调查研究

Research of a Vegetable Soil Heavy Metal Pollution in Dongguan

为了解东莞市重金属污染情况,随机选取东莞市某一菜地土壤进行土壤和蔬菜重金属含量调研分析,采集分析了99个土壤样品和52个蔬菜样品重金属含量情况。研究表明,所调查的菜地中,土壤受到中轻度Cd污染,轻度Hg污染。重金属Cd污染形势比较严峻,几乎全部土壤处于警戒线水平,大部分土壤处于轻度污染;蔬菜受土壤Cd污染影响较为明显,菜心、葱和空心菜中分别有23.33%、33.33%和20%超出国家标准;不同蔬菜对重金属敏感度不同,菜心对重金属Cd、Hg和Pb均较敏感,容易吸收积累这三种重金属。

In order to find out the heavy metal pollution in Dongguan City, randomly selected a vegetable field in Dongguan City, the heavy metal concentration of the soil and vegetables to survey pollution were analyzed, and 99 soil samples and 52 vegetable samples of the heavy metal concentration were gathered and analyzed. The results showed that the vegetable field soil was slight and moderate cadmium pollution and slight mercury pollution. Heavy metals cadmium pollution situation was fairly grim, and almost all of the soil in the cordon level, most of the soil was slightly polluted. The vegetables impacted by soil Cd pollution obviously. The Cd concentrations of flowering cabbage, onion and water spinach were 23.33%, 33.33% and 20%, which exceeded the national standards. Different vegetables on the heavy metal sensitivity, cabbage sensitive than those of the heavy metals Cd, Hg and Pb and easily absorbed accumulated these heavy metals.