Removal of pesticide mixtures in a stormwater wetland collecting runoff from a vineyard catchment.
Removal of pesticide mixtures in a stormwater wetland collecting runoff from a vineyard catchment.
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DOI：
10.1016/j.scitotenv.2011.01.057
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
E. Maillard;S. Payraudeau;Etienne Faivre;C. Grégoire;S. Gangloff;G. Imfeld
中科院分区：
文献类型：
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作者：
E. Maillard;S. Payraudeau;Etienne Faivre;C. Grégoire;S. Gangloff;G. Imfeld
湿地可以收集农业集水区受污染的径流，并保留溶解的和含有颗粒的农药。然而，关于湿地系统去除农药的能力和功能的知识非常有限。在这里，我们表明，尽管湿地的流量和水化学条件随时间变化很大，但在施用农药期间，雨水湿地可以有效去除葡萄园流域径流中的农药。整个农季，9种杀菌剂、6种除草剂、1种杀虫剂和4种降解产物的流入量为8.039g，流出量为2.181g。湿地对溶解负荷的去除率从 39%（西玛津）到 100%（霜脲氰、草甘膦、醚菌酯和特丁嗪）不等。烯酰吗啉、敌草隆、草甘膦、甲霜灵和四康唑在春季的去除效率高于夏季。超过 88% 的悬浮固体输入质量被保留，强调了湿地通过沉积捕获含有农药的颗粒的能力。在湿地沉积物中经常检测到杀虫剂氟虫脲。我们的结果表明，在农药施用的关键时期，雨水湿地可以有效去除农业径流中的农药混合物，尽管径流状况和水化学特征的波动会影响单个农药的去除率。
Wetlands can collect contaminated runoff from agricultural catchments and retain dissolved and particle-laden pesticides. However, knowledge about the capacity and functioning of wetland systems with respect to the removal of pesticides is very limited. Here we show that stormwater wetlands can efficiently remove pesticides in runoff from vineyard catchments during the period of pesticide application, although flow and hydrochemical conditions of the wetland largely vary over time. During the entire agricultural season, the inflowing load of nine fungicides, six herbicides, one insecticide and four degradation products was 8.039g whereas the outflowing load was 2.181g. Removal rates of dissolved loads by the wetland ranged from 39% (simazine) to 100% (cymoxanil, gluphosinate, kresoxim methyl and terbuthylazine). Dimethomorph, diuron, glyphosate, metalaxyl and tetraconazole were more efficiently removed in spring than in summer. More than 88% of the input mass of suspended solids was retained, underscoring the capability of the wetland to trap pesticide-laden particles via sedimentation. Only the insecticide flufenoxuron was frequently detected in the wetland sediments. Our results demonstrate that stormwater wetlands can efficiently remove pesticide mixtures in agricultural runoff during critical periods of pesticide application, although fluctuations in the runoff regime and hydrochemical characteristics can affect the removal rates of individual pesticides.