Residue patterns of currently, historically and never-used organochlorine pesticides in agricultural soils across China and associated health risks.
Residue patterns of currently, historically and never-used organochlorine pesticides in agricultural soils across China and associated health risks.
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DOI：
10.1016/j.envpol.2016.10.060
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发表时间：
2016-12
影响因子：
8.9
通讯作者：
Lili Niu;Chao Xu;Siyu Zhu;Weiping Liu
中科院分区：
文献类型：
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作者：
Lili Niu;Chao Xu;Siyu Zhu;Weiping Liu
有机氯农药（OCPs）在不同的使用状态下（如目前使用、历史使用和从未使用），在环境中表现出不同的行为和潜在风险。必须确定其分布模式和归宿，并评估其对人类的相关健康风险。在这项研究中，基于中国全国范围内的采样活动，我们确定了农业土壤中目前（硫丹）、历史上（氯丹和七氯）和从未使用过的（艾氏剂、狄氏剂和异狄氏剂）有机氯农药的浓度。土壤中∑硫丹、∑氯丹、七氯和∑Drins的总残留量分别为260、64.3、54.2和88.6吨。硫丹的残留受当前使用量的影响，呈现出纬度样带趋势。农药主要来源于远距离迁移，但在我国非法使用仍影响其残留。这一结果表明，硫丹和硫丹在中国农业土壤中主要分别遵循一级和二级分布模式。初级和次级分布都对氯丹的分布格局有很大影响，在我们取样时，氯丹仅被禁止了4年。根据这些有机氯农药的浓度估算其健康风险。有0.813%和1.63%的样本超过了荷兰未污染土壤准则规定的氯氰菊酯和异狄氏剂目标值。在大部分样本中，其残留物对人类没有或很少构成非致癌和致癌风险。研究结果将为污染控制和管理提供有力的支持。
Organochlorine pesticides (OCPs) with different usage states, such as currently, historically or never used, may show different behaviors and potential risks in the environment. It is essential to identify their distribution patterns and fates and to assess their associated health risks to humans. In this study, based on a nationwide sampling campaign across China, we determined the concentrations of currently (endosulfan), historically (chlordane and heptachlor) and never-used (aldrin, dieldrin and endrin) OCPs in agricultural soils. The total residue inventories of ∑Endosulfans, ∑Chlordanes, heptachlor and ∑Drins in soils were 260, 64.3, 54.2 and 88.6 t, respectively. The residues of endosulfan were influenced by current usage, showing a latitude transect trend. Drins were mainly from long-range transport, but the illegal usage in China still affected their residues. This finding indicates that endosulfan and drins in Chinese agricultural soils mainly follow the primary and secondary distribution pattern, respectively. Both primary and secondary distribution have a great impact on the distribution pattern of chlordane, which had been banned for only 4 years at the time we sampled. The health risks of these OCPs were estimated based on their concentrations. There were 0.813% and 1.63% of samples that exceeded the target values for chlordane and endrin according to the Netherlands guideline for unpolluted soil. Their residues in most of the samples posed no or few non-carcinogenic and carcinogenic risks to human beings. The results from this study will provide powerful support for pollution control and management.