| 华北平原某集约化种植区地下水污染探讨 |
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| 关键词:intensive cropping groundwater pollution plastic membrane vadose zone protective capability |
| 基金项目:国家973项目(编号: 2010CB428804-1);环保部公益性行业科研专项项目(编号: 201309004);中国地质调查局国土资源大调查项目(编号: 1212010634611) |
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| 摘要: |
| Pollution of Groundwater in an Intensive Cropping Area, North China |
| Eight groundwater samples and eleven soil samples were collected in an intensive cropping area, North China, to analyze the pollution extent of groundwater and identify the pollution mechanism from the source to the object. The results demonstrate that the organic residues in soil are mainly composed of organo-chlorine pesticide, polycyclic aromatic hydrocarbons and phthalates acid esters. The nitrate concentration in groundwater has been growing rapidly, and Cr is the highest one among heavy metals, none of which, however, exceeds the threshold quality for groundwater standard. Groundwater is free from organo-chlorine pesticide contamination, but it still suffers from some input of polychlorinated biphenyls. Several semi-volatilized organic compounds were detected in groundwater samples, among which the phthalates acid esters released from plastic membrane has the maximum quantity. As indicated above, groundwater has been heavily polluted. The fundamental causes for groundwater contamination are massive fertilizer, pesticides and plastic membrane used in the intensive cropping area causing serious pollution load and the high frequency of irrigation serving as compelling force of pollutant acceleration. The heterogeneous thickness of clay in the vadose zone and incompletely sealed wells are also factors with which intensive cropping activities influence groundwater quality. |
| LIU Jin,FEI Yu-hong,ZHANG Zhao-ji,LI Ya-song,CUI Xiang-xiang,LEI Ting,WU Guo-qing.2014.Pollution of Groundwater in an Intensive Cropping Area, North China[J].Acta Geoscientica Sinica,35(2):197-203. |
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