摘要
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>B i>Cu>As>Cr>N i>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,总体来说还是相对比较稳定的,但由于样品中As、Zn、Cu、Pb元素的含量较高,随着外界环境条件的变化,其对生态环境的影响仍不能忽视;矿区周围土壤中As、Zn、Cu、Pb等重金属污染元素与其他重金属全量间相关性较好,污染来源基本相同。其主要原因可能来源于成土过程、矿物的伴生及其转化等自然过程和矿石的开采及运输、大气降尘等过程。
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 ZnSbPbBiCuAsCrNiCd;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.
出处
《贵州大学学报（自然科学版）》
2011年第1期132-135,共4页
Journal of Guizhou University:Natural Sciences
基金
贵州省科学技术基金资助项目(黔科合J字[2008]2029号)
喀斯特环境与地质灾害防治教育部重点实验室(贵州大学)开放基金
关键词
矿区
重金属污染
化学形态
mining area
heavy metal pollution
chemical form
