生态环境学报2018，Vol.27Issue(6)：1145-1152,8.DOI:10.16258/j.cnki.1674-5906.2018.06.020
滇池周边磷矿复垦区土壤重金属污染特征研究
Characteristics of Heavy Metals in Reclaimed Soils of A Phosphorite-mining Area around Dianchi Lake
摘要
Abstract
In China, heavy metal residues from long-term phosphorite-mining exhibit environmental risks to agricultural or forestry practices in reclaimed mining area. In this study, the contents of 10 kinds of heavy metal (Cu, Cd, Cr, Pb, Zn, Ti, Mn, V, Ni and Co) in reclaimed soils with different land-uses under different reclamation years of a phosphorite-mining area around Dianchi Lake were analyzed. Indexes of comprehensive pollution, geoaccumulation, and potential ecological risk were evaluated to assess the heavy metal pollution and its ecological risk. Results from comprehensive index and potential ecological risk index showed that Cd was the primary pollutant in reclamation areas and result of the geoaccumulation index indicated that the primary pollutant in most reclamation areas was Pb. On the whole, the primary pollutants in the reclamation areas were Cd and Pb. Highest content of heavy metals and highest ecological risk in the soils of the restoration zone were found. With the increase of rehabilitated years, the heavy metals in the soil of farm land and forest declined, indicating that reclamation in the mining area reduced the abundance of heavy metals and their ecological risks. Meanwhile, planting crops or trees grown in reclaimed soils under short reclamation years were still at risk. Clustering analysis showed that the pollution characteristics of Cd, Pb, and Cr in the soil were significant similar. Combined pollution of two or three heavy metals was often found in the reclamation area. In conclusion, it is not only the prevention and control of primary heavy metals should be conducted but also the cooperative control of the combined pollution of manifold heavy metals in order to enhance treatment effect and reduce treatment cost.关键词
磷矿复垦/重金属污染评价/复垦年限/地累积指数法Key words
reclamation of mining area/pollution assessment of heavy metals/reclamation years/Geoaccumulation index分类
资源环境引用本文复制引用
杨威杉,於方,赵丹,李猛..滇池周边磷矿复垦区土壤重金属污染特征研究[J].生态环境学报,2018,27(6):1145-1152,8.基金项目
中国博士后科学基金项目(2016M601095) （2016M601095）
国家重点研发计划重点专项(2016YFC0208800) （2016YFC0208800）
国家自然科学基金青年基金项目(41701561) （41701561）
