The Heavy Metal Pollution Estimation Of Soils In Harbin Greenbelt

In this thesis, the present situation of heavy metals pollution and the physical and chemical properties of soils and the enrichment situation of heavy metals (Cd, Hg, Pb and Cr) in the vegetable body in the Harbin city greenbelt was investigated and evaluated. The results were showed as follows:The four heavy metals all polluted greenbelt soil by different degree in Harbin. The pollution of hydrargyrum is the most serious and reaches to the heavy pollution. The next pollution is plumbum, cadmium and chrome.Using single factor to estimate pollution situation of five zones in Harbin, its result shows that the pollution situation of cadmium and hydrargyrum is very serious in the public greenbelt. The pollution situation of plumbum is very severe in the road greenbelt. The content of chromium is very high in the agricultural zone. The pecking order of the pollution situation is the public greenbelt > the habitation greenbelt > the road greenbelt > the suburb agricultural zone > by the fuzzy comprehensive assessment.The pecking order of the comprehensive index of ten greenbelt vegetables is Populus nigra Linn>lawn>Juglans mandshurica Maxim>Syringa microphylla> Syringa oblata Lindl>Picea koraiensis Nakai > Salix matsudana >Ligustrum suave Kitag> Ulmus pumila > Acer negundo. The pecking order of the agricultural vegetables is soybean>cole>corn> alfalfa>broomcorn>paddy>bean; The strongest enrichment capability of the greenbelt vegetable is Syringa microphylla; the strongest enrichment capability to the hydrargyrum and plumbum of the greenbelt vegetable is Juglans mandshurica Maxim; the strongest enrichment capability to the chrome of the greenbelt vegetable is Populus nigra Linn.The compound pollution sign exists in the soil between total cadmium, total hydrargyrum, total plumbum and chrome. The prominent correlation exists in total cadmium and total plumbum. The correlation coefficient is very lower between heavy metals in the vegetable body. The correlation coefficient is very prominent between cadmium and plumbum in the vegetable body. The correlation between vegetable and soil's heavy metal content of the cadmium is very prominent and others is very lower.The main pollution source of the hydrargyrum of vegetable and soil is the atmosphere dust of factory and gas in the Harbin's greenbelt. One of the pollution sources of the hydrargyrum is the fluorescent lamp. The universal application of the fluorescent lamp produces a lot of pollutions of public greenbelt in the ice and snow day of haerbin.