贵州晴隆大厂锑矿区周围土壤重金属污染状况的分析与评价

对贵州晴隆大厂锑矿矿区周围土壤中重金属的总量和化学形态进行了详细研究.研究结果表明,该矿区周围土壤综合污染指数为23.32,周边土壤已受严重污染,矿山周围土壤重金属含量依次为Zn＞Sb＞Pb＞Bi＞Cu＞As＞Cr＞Ni＞Cd;该矿区重金属污染物的化学形态总的分布趋势为可交换态＜可还原态＜可氧化态＜残渣态,因此,总体来...

The Analysis and Assessment on the Pollution Condition of Heavy Metals in the Soil around the Qinglong Dachang Antimony Mining Area in Guizhou Province

The amount and chemical form of heavy metals in the soil around the Qinglong Dachang antimony mining area in Guizhou Province were researched.The results indict that the comprehensive pollution index of the soil around the antimony mining area was 23.32,the contents of heavy metal was Zn>Sb>Pb>Bi>Cu>As>Cr>Ni>Cd;the distribution of heavy metal forms was : exchangeable morphology < reducible morphology < oxidisable morphology < residual morphology,Therefore,heavy metals are relatively stable,but the contents of heavy metals As,Zn,Cu,Pb were higher,with the external environmental conditions change,its impact on the ecological environment won’t still be ignored;the contents of heavy metals As,Zn,Cu,Pb have better correlation with other heavy metals,they have the same sources of pollution.The main reasons of the soils pollution were: the process of soil formation and transformation of minerals and other natural processes associated and the process of mining and transporting ores as well as falling dust in atmosphere.