| 引用本文: | 吕晓磊,王立,马放,刘丽艳,李一凡.污灌湿地六六六和滴滴涕残留现状及源分析[J].哈尔滨工业大学学报,2012,44(6):28.DOI:10.11918/j.issn.0367-6234.2012.06.007 |
| Lv Xiao-lei,WANG Li,MA Fang,LIU Li-yan,LI Yi-fan.Pollution characterization and source apportionment of HCH and DDT in sewage irrigation soil of Xiao Qing River wetland[J].Journal of Harbin Institute of Technology,2012,44(6):28.DOI:10.11918/j.issn.0367-6234.2012.06.007 |
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| 污灌湿地六六六和滴滴涕残留现状及源分析 |
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吕晓磊1,2, 王立1,2, 马放1,2, 刘丽艳1,2, 李一凡2,3
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1.哈尔滨工业大学 城市水资源与水环境国家重点实验室, 150090;2.哈尔滨工业大学 市政环境工程学院, 150090;3.加拿大环境部科学技术局, 加拿大 多伦多M3H5T4)
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| 摘要: |
| 为考察小清河污灌湿地中滴滴涕(Dichlorodiphenyltrichloroethane,DDT)和六六六(Hexachlorocyclohexane,HCH)的残留量及污染来源,并研究污染物(DDT和HCH)沿土壤垂直剖面的分布规律,对不同污灌区土壤样品进行索氏萃取、硅胶净化等预处理后,用气质联用仪测定HCH和DDT的质量浓度．结果表明:湿地表层土壤中HCH和DDT平均质量分数分别为0042和0204 μg／kg,质量分数范围分别为ND～0225 μg/kg和ND～1204 μg／kg,远低于国家土壤环境质量标准(GB15618—1995)中规定的土壤DDT和HCH残留量一级标准限值005 mg／kg,处于较低的残留水平;无污灌湿地HCH异构体残留量依次为β-HCH>α-HCH>γ-HCH,HCH残留主要是历史使用的农药残留和少量新成污染;湿地DDT污染主要以DDE形式存在,是历史使用的农药残留造成的;污灌降低了土壤中DDT和HCH的残留量,平均降低比率为6716％和78％;湿地土壤相同样点中DDT残留量高于HCH残留量;DDT残留量随土壤深度的增加整体呈现减少的趋势,HCH残留质量分数随土壤深度变化无明显规律． |
| 关键词: 湿地土壤 六六六 滴滴涕 源解析 污水灌溉 |
| DOI：10.11918/j.issn.0367-6234.2012.06.007 |
| 分类号:X823 |
| 基金项目:国家自然科学基金资助项目(50809020,51178139);国家自然科学基金委创新研究群体科学基金资助项目(51121062);城市水资源与水环境国家重点实验室(哈尔滨工业大学)基金资助项目(HC200816) |
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| Pollution characterization and source apportionment of HCH and DDT in sewage irrigation soil of Xiao Qing River wetland |
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Lv Xiao-lei1,2, WANG Li1,2, MA Fang1,2, LIU Li-yan1,2, LI Yi-fan2,3
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1.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, China;2.School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China;3.Science and Technology Branch, Environment Canada, Toronto, Ontario M3H5T4, Canada)
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| Abstract: |
| To investigate the residues and pollution sources of DDT and HCH in the Xiao Qing River sewage irrigated wetland and study the distribution of pollutants (DDT and HCH) along the vertical soil profile, soil samples were pretreated by Soxhlet extraction and silica gel purification, and the HCH and DDT content were analyzed by GC-MS. The results show that the concentrations of ΣHCHs and ΣDDTs in the soils range from ND-0225 μg／kg and ND-1204 μg／kg respectively, with the mean concentrations of 0042 μg／kg and 0204 μg／kg. The concentrations of DDTs and HCHs are below the national soil environmental quality standards (GB 15618—1995), which are at a low residue levels. The HCH residues in wetlands without irrigation are caused mainly by historical pesticide using and there is few pollutions generated recently. DDT contamination of wetlands exists mainly in the form of DDE, that is due to historical pesticide using. Sewage irrigation reduced soil residues of DDT and HCH, with average reduction rate of 6716％ and 78％. The HCH residues are higher than DDT residues at the same point. The DDT contents drop sharply along the soil profiles, and the HCH contents change irregularly along the soil profiles. |
| Key words: wetland soil HCH DDT source apportionment sewage irrigation |
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