Research of a Vegetable Soil Heavy Metal Pollution in Dongguan

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.