污染场地不同深度土壤有机-矿质复合体中有机氯农药的分布  

Organochlorine pesticides distribution in organo-mineral aggregates in different soil layers from a contaminated site

作　　者：丛鑫[1] 燕云仲[1] 薛杨[1] 谷庆宝[2] 

机构地区：[1]辽宁工程技术大学环境科学与工程学院阜新123000 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012

出　　处：《环境工程学报》2012年第8期2882-2886,共5页Chinese Journal of Environmental Engineering

基　　金：中央级公益性科研院所基本科研业务专项(2008GGQD01)

摘　　要：采用物理方法将某农药厂土壤分成4种粒径的有机-矿质复合体组分,粘粒、粉粒、细砂和粗砂,研究有机氯农药在土壤不同有机-矿质复合体组分中的分布特征及有机质含量对污染物质赋存分布的影响。结果表明,粉粒组分中污染物质六六六含量较高,粘粒组分中滴滴涕含量较高。粘粒和粉粒组分中污染物质的含量与相应的有机质含量间呈现显著相关关系,而在细砂和粗砂中这种相关性不显著。lgKoc值与污染物质含量的相关性分析结果与有机质的相关性分析结果相似。有机质可能是影响场地土壤有机氯农药分布的重要因素之一。本研究的结果可为污染场地的风险控制和环境修复提供基础依据。Four different soil particle-size fractions, clay, silt, fine sand and coarse sand from the soils in an organochlorine pesticide （OCP） field, were separated by physical method to characterize the OCPs distribu- tion in soils and to study the effect of organic matter content in different organo-mineral aggregates on pollutants distribution. The results suggested that the concentration of HCHs in silt and DDTs in clay was higher than that in other organo-mineral aggregates. There was a significant correlationship between the contents of HCHs and DDTs and the organic matter in the clay and silt. However, the relationship was not significant in the fine and coarse sand. The results were in accordance with the analysis results between the values of lgKocand the content of the pollutants. The experimental data also showed that organic carbon may be one of the important factors for the distribution of OCPs in the soils of the studying field. The results of this study could provide the foundation for environmental remediation and the risk controlling of contaminated sites.

关 键 词：污染场地 有机-矿质复合体 有机氯农药 

分 类 号：X53[环境科学与工程—环境工程]