我国重点流域地表水中29种农药污染及其生态风险评价Residue Characteristics and Ecological Risk Assessment of Twenty-nine Pesticides in Surface Water of Major River-Basin in China
徐雄;李春梅;孙静;王海亮;王东红;宋瀚文;王子健;
摘要(Abstract):
针对我国重点流域水体,包括长江流域、黄河流域、太湖流域、松花江流域、黑龙江流域、东江流域、南水北调中线和东线等,分析了29种农药(18种有机氯农药、6种有机磷农药、3种三嗪类农药、1种酰胺类和1种取代杂环类农药)在流域地表水中浓度,并使用风险商的方法进行了生态风险评价。结果显示,在27个采样点地表水样中一共检出9种农药,包括α-六六六、α-氯丹、γ-氯丹、西玛津、阿特拉津、乙草胺、扑草净、敌敌畏和噁草酮。其中,阿特拉津、乙草胺、扑草净、噁草酮和敌敌畏的检出率分别为100.0%,74.1%,59.3%,37.0%和33.3%;α-六六六、α-氯丹、γ-氯丹和西玛津均只有1~2个采样点检出。阿特拉津在各采样点浓度范围为7.0 ng·L-1~1 289.5 ng·L-1;乙草胺浓度范围为未检出(ND)~579.9 ng·L-1;扑草净浓度范围为ND~104.2 ng·L-1;噁草酮浓度范围为ND~32.6 ng·L-1;敌敌畏的浓度范围为ND~204.5 ng·L-1。研究发现,阿特拉津在太湖流域、黑龙江流域和松花江流域具有潜在生态风险;乙草胺在松花江流域有潜在生态风险;噁草酮在长江流域、太湖流域、松花江流域和黑龙江流域有潜在生态风险;敌敌畏在长江流域、黄河流域和东江流域具有潜在生态风险。上述4种需要重点关注的水体污染物中,仅阿特拉津和敌敌畏被列入地表水环境质量标准(GB3838-2002),但都没有保护水生生物或保护水生态的标准。
关键词(KeyWords): 农药;地表水;风险评价;重点流域
基金项目(Foundation): 国家自然科学基金项目(51290283);; 中国科学院135项目(YSW2013A02);; 环境保护部《重点流域环境保护监管》项目
作者(Author): 徐雄;李春梅;孙静;王海亮;王东红;宋瀚文;王子健;
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