Research On Heavy Metal Pollution And Evolution In Farmland Soil Of Pinghu City, ZheJiang Province

Using mass balance theory, heavy metal elements pollution in farmland soil was evaluated. At the same time, heavy metal elements concentration evolution rules were analysised based on nearly 1000 years soil evolution time. The research results were that the farmland soil was artificially polluted.Expect 5.6 percent was moderately polluted by Hg, the others were slightly artificially polluted. Bacause heavy metal elements concentration was controlled by human action and natural weathering.process, its quality was the only polluted standards to discriminate. Heavy metal element Hg was firstly influenced by human action, its quality was higher and higher; Except for Cd concentration varied lower and lower, others heavy metal element concentration would become higher and higher under natural evolution.