重庆蔬菜的重金属污染调查

本文于2002年对重庆市部分区县37个乡镇的菜地蔬菜进行了有针对性地采样、试验和评价以及对比分析。发现重庆蔬菜已经 受到了重金属Cd、Pb和Hg的污染。污染程度排序为近郊区>城郊区>远郊区,Cd污染>Pb污染>Hg污染。与1999年相比,重庆蔬菜 的重金属污染状况总的来说有很大的好转,但是,Cd的污染有加重趋势。

INVESTIGATION ON HEAVY METAL POLLUTION TO VEGETABLES IN CHONGQING

The article aims at presenting the author's investigation on the heavy metal pollution to the vegetables in Chongqing municipality and the 37 towns under its juristigation in 2002. The article has brought about its own samples, testing data, comparison and contrast analyses and assessment. It is found as the result of investigation that the vegetables of Chongqing have been polluted by heavy metals of Cd, Pb and Hg. The pollution order is suburbs>outskirts of city>the outer suburbs and Cd> Pb> Hg respectively. In comparison with that of year 1999, the heavy metal pollution of Chongqing vegetables takes a favourable turn, but the pollution of Cd has become more serious and the pollution of Pb and Hg has improved a little. The pollution of vegetables has proved widespread and therefore close attention should be paid to the pollution study. Hence, it is highly advised to develop the research of heavy metal pollution mechanism and susceptibility experimentation with special attention to Cd pollution being paid to the vegetable and the potted or field experimentation of taro and shallot so as to harness it.