摘要
为弄清小型县镇矿区周围土壤中重金属的污染状况,选取土壤中Ag、Hg和Mo等7种重金属,采用单项污染指数法,对潼关县某金矿区排水沟附近土壤的重金属污染状况进行分析与评价。结果表明:矿区附近土壤中Ag、Hg均已达到极严重污染,单项污染指数平均值分别为321和252,最大值分别超过评价标准的466倍和800倍;Mo、As、Zn和Se污染相对较轻,但其平均值也已达重度污染水平;Ba在矿区内暂无污染。经相关性分析,Mo-Ag间存在极高的相关性,相关系数高达0.965;As-Se-Zn这3种元素间相关性次之,相关系数均>0.85,可能有相近或相同的污染源,复合型污染的可能性很大。
The heavy metal pollution status of soil around a gold field in Tongguang County was analyzed and evaluated by mean of single pollution index to explore the heavy metal pollution status of soil around small-scale mining areas.The results showed that the polluted degree of soil samples by heavy metal silver and mercury were very serious,and the mean value of single factor pollution index of silver was 321 and mercury was 252,and the highest index of silver was 466 and mercury was 800 times more than the standard value.Though the pollution of molybdenum,arsenic,zinc and selenium were slight,the mean value of them amount to severe pollution levels.The barium contents don＇t amount to the pollution level.The correlation relationship exits between molybdenum and silver,and among arsenic,selenium and zinc.The correlation coefficient of the former was 0.965,and the latter took the second place and their correlation coefficients were more than 0.85.It might have the same or similar pollution sources around them.And it could be compound pollution very probably.
出处
《贵州农业科学》
CAS
北大核心
2012年第10期187-189,共3页
Guizhou Agricultural Sciences
基金
陕西省教育厅项目"黄河湿地潼关段金矿污染生态修复研究"(11JK0763)
渭南师范学院重点项目"渭河水系重金属污染生物赋存形态及污染特征研究"(12YKF012)
关键词
单项污染指数
土壤污染
重金属
相关系数
single-factor pollution index
soil contamination
heavy metals
correlation coefficients
