摘要
对乐安江流域稻田表层土壤中Pb、Cd、Cu、Zn的分布特征进行分析,按照单因子污染指数法和内梅罗综合污染指数法,依据土壤环境背景值标准和国家土壤环境质量标准对乐安江流域稻田土壤的重金属进行评价。结果表明,矿集区上游水稻田土壤重金属综合污染指数等级尚在安全范围内,矿集区周边Cd和Cu的单项污染指数大于1,综合污染指数达到7.82,属于重污染;矿集区下游接近警戒值。研究表明,矿集区矿业开发释放的重金属元素对乐安江中下游流域水稻田土壤的重金属累积具有重要影响。
To investigate the influence of ore exploration on soil environment, the authors conducted investigations in the rice field topsoils of the Le＆#39;an River. The concentrations of heavy metals Cd, Cu, Pb and Zn in the topsoils were analyzed, and the soil envi-ronmental quality on the basis of the environmental background value criteria were evaluated by single factor index and Nemerow multi-factor index method, respectively. The results show that the soils were polluted by heavy metals Pb, Cd, Cu and Zn, with the National Standard （GB15618-1995） as the evaluation standard. In addition, heavy metals pollution in various degrees occurs in the ar-eas along the lower and middle reaches of the Lea＆#39;n River. The results indicate that the average concentrations of heavy metals （Cd and Cu） in the soil exceed the background values, and the integrated contamination index of all samples has exceeded 7.82. The heavy metal levels in the soils are closely related to local geological environment and controlled by one or more leading factors of geo-logical environment.
出处
《地质通报》
CAS
CSCD
北大核心
2014年第8期1213-1219,共7页
Geological Bulletin of China
基金
中国地质调查局项目(编号:1212011120284)
中央级公益性科研院所基本科研业务费专项(编号:K0905)
国土资源部公益性行业科研专项(编号:201111020-05
200911007-01)
关键词
稻田表层土
重金属累积
乐安江流域
德兴矿集区
rice field topsoils
heavy metal accumulation
Le＆#39
an River basin
Dexing ore concentration area
