| 江西乐平市戴村重金属环境地球化学特征及意义 |
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| 关键词:acid mine drainage heavy metal terraces Daicun village Dexing ore concentration area |
| 基金项目:国土资源部公益性行业科研专项“德兴铜矿集区地球化学环境累积效应与预警方法研究”(编号: 201111020-05) |
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| Environmental Geochemical Characteristics and Significance of Heavy Metals in Daicun Village, Leping City, Jiangxi Province |
| Daicun village is located in Leping City, Jiangxi Province, on the bank of the Le'an River. Due to the impact of Dexing copper mine, Yinshan polymetallic ore deposit, Jinshan gold deposit and other deposits which lie on the upper reaches of the Le’an River, Daicun village has become one of China’s top ten cancer villages. In this paper, the content of heavy metals and pH in samples of soils, surface water, groundwater and cabbage were measured in the first and second terraces (T1, T2) of Daicun village. It was found that the soil of T1 was contaminated by As and Cd at a low degree (the single factor index of As was 1.213, 1.473 respectively, that of Cd was 1.98) partly, and the single factor indexes (< 0.7) and the Nemero comprehensive pollution indexes (< 1) of the T2 soil element belonged to the safety range, the pH values of the whole soil were found in the range of 4.38~5.7, low than the national standard (> 6.5). The content of heavy metals in the soil and its accumulation rate showed a decreasing trend with the increasing distance from the river. The quality of surface water and groundwater was safe. The values of Cu, As, Pb, Cd and Hg in cabbage were 6.7%, 86.7%, 100%, 100% and 100%, respectively, and the enrichment of Cd was higher in cabbage (between 1.03 and 4.88). The local non-carcinogenic risk index of the heavy metal was 0.137, the non-carcinogenic health hazard was not significant but still had the potential harm, the carcinogenic risk value was 1.65×10–4, which was an unacceptable risk. The authors put forward some suggestions for pollution prevention and control in the aspects of the upstream mine, the crop cul-tivation and the residents’ living habits. |
| LI Zi-shuan,CHEN Long,ZHAO Yuan-yi.2018.Environmental Geochemical Characteristics and Significance of Heavy Metals in Daicun Village, Leping City, Jiangxi Province[J].Acta Geoscientica Sinica,39(1):62-70. |
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