| Guiyang City, between east longitude 106°07' to 107°17', northern latitudes 26°11' to 27°22', locates in the middle of Guizhou province and in east slope district of Yun-Gui plateau. Guiyung, with abundant resources, ample energy and good natural environment, has gentle-wetness subtropics climatic characteristics because it's geography variety, high elevation and low latitude. This thesis studies the environment geochemistry characteristic of the heavy metals pollutants which are As, Cd, Cr, Cu, Hg, Pb, Ni and Zn, in the surficial soil of Guiyang. Make baseline of heavy metals in soil certain and establish the geochemistry norms to distinguish the nature or the artificial influence to environment. And then analyzes the heavy metals pollution in the surficial soil of Guiyang. The flowing conclusions we have been drawn:1. The mean value, mean square deviation and maximum of As separately are 18.09 mg/kg, 11.57 mg/kg and 79.30 mg/kg in the surficial soil in Guiyang. The content of arsenic in 95.9 per cent sample are smaller than 40 mg/kg. Of Cd separately are 0.302mg/kg, 0.363mg/kg, 2.620mg/kg and 95.7 per cent smaller than 1.000mg/kg. Of Cr 75.3mg/kg, 37.3mg/kg, 271.0mg/kg and 95.9 per cent smaller than 150.0mg/kg. Of Cu separately are 43.1mg/kg, 30.3mg/kg, 213.0mg/kg and 94.6 per cent smaller than 100.0mg/kg. Of Pb are 43.2mg/kg, 31.3mg/kg, 318.9mg/kg and 95.5 per cent smaller than 100.0mg/kg. Of Hg are 0.222mg/kg, 0.531mg/kg, 7.030mg/kg and 98.2 smaller than 1.000mg/kg. Of Ni are 38.3mg/kg, 14.9mg/kg, 102.5mg/kg and 95.8 per cent smaller than 70.0mg/kg. Of Zn are 84.7mg/kg, 49.8mg/kg, 385.0mg/kg and 94.3 per cent smaller than 150.0g/kg.2. By statistically analyzing methods we get the baseline of arsenic in Guiyang is 9.04 mg/kg and the soil over 29.0 mg/kg may suffer contamination. The data of Cd are 0.068mg/kg and 1.010mg/kg. Of Cr are 44.0mg/kg and 100.2mg/kg. Of Cu are 18.8mg/kg and 68.4mg/kg. Of Pb are 14.8mg/kg and 70.1mg/kg. Of Hg are 0.045mg/kg and 0.530mg/kg. Of Ni arel7.0mg/kg and 57.0mg/kg. Of Zn are 46.3mg/kg and 112.0mg/kgn.3. By means of Geoaccumulation Index analysis, we get the surficial soil in 41 per cent of the Guiyang did not suffer the arsenic contaminative, 43 per cent is between without pollution to mid-pollution, 14 per cent mid-pollution, only 2 per cent is between mid-pollution to strong pollution. In 40 per cent did not suffer the cadmium contaminative, 19 per cent between without pollution to mid-pollution, 14 per cent mid-pollution, 19 per cent between mid-pollution to strong pollution, 7 per cent strong pollution, 1 per cent between strong pollution to supper strong pollution. In 46 per cent did not suffer the chromium contaminative, 47 per cent between without pollution to mid-pollution, 6.8 per cent mid-pollution, only 0.2 per cent between mid-pollution to strong pollution. In 38 percent did not suffer the copper contaminative, 38 per cent between without pollution to mid-pollution, 22 per cent mid-pollution, only 2 per cent between mid-pollution to strong pollution. In 18 per cent did not suffer the lead contaminative, 47 per cent between without pollution to mid-pollution, 28 per cent mid-pollution, only 3 per cent between mid-pollution to strong pollution. In 12 per cent did not suffer the mercury contaminative, 37 per cent between without pollution to mid-pollution, 36 per cent mid-pollution, 11 per cent between mid-pollution to strong pollution, 2 per cent strong pollution, 1 per cent supper between strong pollution to supper strong pollution, 1 per cent supper strong pollution. In 19.2 per cent did not suffer the nickel contaminative, 63.7 per cent between without pollution to mid-pollution, 16.8 per cent mid-pollution, only 0.3 per cent between mid-pollution to strong pollution. In 41 per cent did not suffer the zinc contamination, 50per cent between without pollution to mid-pollution, 7 per cent mid-pollution, only 2 per cent between mid-pollution to strong pollution.4. The maximum of arsenic contaminative degree of surficial soil in Guiyang is 4.27. 50.2 pe...
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