席北斗;虞敏达;张媛;高如泰;张慧;李丹;檀文炳;侯浩波;余红;

• 1: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
• 2:中国环境科学研究院地下水环境系统创新基地
• 3:常州大学环境与安全工程学院
• 4:武汉大学环境学院

摘要(Abstract)：

在我国华北地区由于水资源的匮乏及农业生产的需要,采用污水灌溉与施用有机氯农药(OCPs)结合的农业管理方式普遍存在。大量OCPs则被引入到当地环境中,进而可能对该地区的居民产生潜在的健康风险。本研究分析石家庄市汪洋沟污灌区OCPs的残留状况,探讨污水灌溉条件下土壤-作物系统OCPs残留对土壤质量影响,并评价经口摄入及皮肤接触两种暴露途径下对人体产生的健康风险。结果表明:汪洋沟污灌区地表水、沉积物、土壤和玉米籽粒中检出了14种OCPs,其平均残留浓度分别为36.5 ng·L~(-1)、62.9 ng·g~(-1)、57.3 ng·g~(-1)和27.0 ng·g~(-1),滴滴涕(DDTs)是其最主要的污染物,占OCPs的73%以上,其次是六六六(HCHs)和甲氧滴滴涕。р,р'-DDT是DDTs的最主要成分,其主要来源于污水灌溉或近期DDTs的使用。γ-HCH是环境HCHs残留的主要成分,其主要来源于林丹的输入和使用。此外,在该地区污灌条件下OCPs残留对土壤中C、N循环及有机S的矿化产生一定的负面影响。研究区OCPs残留对人体产生的非致癌风险和致癌风险均不超过控制标准,但经口摄入所引致的非致癌风险应予以关注,其中р,р'-DDT与γ-HCH为主要风险物质。

关键词(KeyWords)： 有机氯农药;污水灌溉;残留特征;土壤环境质量;健康风险评价

Abstract:

Keywords:

基金项目(Foundation): 国家水体污染控制与治理科技重大专项(2012ZX07203-003)

作者(Author): 席北斗;虞敏达;张媛;高如泰;张慧;李丹;檀文炳;侯浩波;余红;

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DOI:

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