Aulagnier Fabien, Poissant Laurier, Brunet Didier, Beauvais Conrad, Pilote Martin, Deblois Christian, Dassylva Nathalie
Environment Canada, Science and technology branch, 105 McGill Street, 7th floor (Youville), Montréal, Québec, Canada H2Y 2E7.
Sci Total Environ. 2008 May 15;394(2-3):338-48. doi: 10.1016/j.scitotenv.2008.01.042. Epub 2008 Mar 6.
Air and precipitation samples were collected and analyzed for 91 pesticides or metabolites from May to September 2004 at St. Damase, an agricultural site located in Yamaska basin in Québec, Canada. A broad range of pesticides was detected during this experiment where 40 different compounds were measured. Most of the samples showed more than 10 simultaneous pesticide detections and sometimes reaching 19 simultaneous detections. The most detected pesticides in air were trifluralin, metolachlor and captan, which were found in all the samples during the 5 months of measurements. For the detected compounds, the average concentrations ranged from 4 pg/m3 to 8 ng/m3. Some of the pesticides detected in air were found in precipitation samples as well showing that wet deposition can occur and have an impact on aquatic ecosystems. The most important pesticides detected were related to corn and soya cultivations, the two main cultures in this region highlighting that the major sources come from local applications. On the other hand, the detection of some pesticides in precipitation which were undetectable in air implies that some compounds may have a long range transport origin.
2004年5月至9月期间，在加拿大魁北克省亚马斯卡盆地的一个农业地点圣达马斯，采集并分析了空气和降水样本中的91种农药或代谢物。在该实验中检测到种类繁多的农药，共测定了40种不同的化合物。大多数样本同时检测到10种以上的农药，有时多达19种。空气中检测到最多的农药是氟乐灵、异丙甲草胺和克菌丹，在5个月的测量期间所有样本中均有发现。对于检测到的化合物，平均浓度范围为4皮克/立方米至8纳克/立方米。在空气中检测到的一些农药在降水样本中也有发现，这表明可能发生湿沉降并对水生生态系统产生影响。检测到的最重要的农药与玉米和大豆种植有关，这两种主要作物表明主要来源来自当地的施用。另一方面，在降水中检测到一些在空气中未检测到的农药，这意味着一些化合物可能有远距离传输的来源。
