农业环境科学学报2012，Vol.31Issue(11)：2142-2151,10.
北京市得田沟金矿和崎峰茶金矿周边土壤重金属形态分析和潜在风险评价
Fraction Distribution and Risk Assessment of Heavy Metals in Soils Around the Gold Mine of Detiangou-Qifengcha,Beijing City,China
摘要
Abstract
Contents and species of heavy metals in the soils around the closed gold mines of Detiangou-Qifengcha in the upstream of Miyi Reservoir were determined to evaluate the level of contamination by the enrichment factor and risk assessment code (RAC ). The resul showed that the contents of all heavy metals (except of As and Pb ) were higher than the background values of Beijing soils, and the spati distributions of heavy metals were of some differences. Pb mainly existed in Fe-Mn oxides fraction, it accounted for more than 50% of tot contents, and the residual form was 33% as followed. Cu was mostly presented in residual state and it was about 72%, and the second was or ganic matter fraction, it accounted for 21%. Zn and Mn were dominated by Fe-Mn oxides fraction and residual fraction, they accounted f more than 93% and 87%, respectively. However, other heavy metals were dominated by the residual states. The maximal total concentratioi and extractable values of most heavy metals were found in around the stacked tailings, so the soils were suffered pollution from stacked tai ings. The enrichment factors indicated that Cr was moderately severe pollution, Hg, Cu, Cd and Ni were moderate pollution, and other hea1 metals were no pollution or minor pollution. RAC showed heavy metals in this area were lower risk.关键词
金矿/土壤/重金属/形态/风险评价编码(RAC)Key words
goldmine/ soil/ heavy metals/ speciation/ risk assessment code(RAC)分类
资源环境引用本文复制引用
陈岩,季宏兵,朱先芳,黄兴星,乔敏敏..北京市得田沟金矿和崎峰茶金矿周边土壤重金属形态分析和潜在风险评价[J].农业环境科学学报,2012,31(11):2142-2151,10.基金项目
国家自然科学基金项目(41173113) （41173113）
