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首页> 外文期刊>Environmental Science & Technology >Temporal and Spatial Trends of Organochlorine Pesticides in Great Lakes Precipitation
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Temporal and Spatial Trends of Organochlorine Pesticides in Great Lakes Precipitation

机译：大湖区降水中有机氯农药的时空变化趋势

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摘要

Organochlorine pesticide concentrations in precipitation samples collected from 1997 to 2003 at seven Integrated Atmospheric Deposition Network sites around the Great Lakes are reported.The 28-day volume weighted mean concentrations of several pesticides,including y-hexachlorocyclo-hexane (HCH),endosulfan,hexachlorobenzene,chlordane,and DDE,showed significant seasonal trends.For current-use pesticides (endosulfan and gamma-HCH),their concentrations peaked in late spring to summer just after their agricultural application.For the banned pesticides,higher concentrations were observed in the winter due to their enhanced partitioning to particles and scavenging by snow.Long-term decreasing trends were observed for several pesticides such as gamma-HCH and DDE.On the other hand,beta-HCH showed significant increasing concentrations as a function of time at Brule River,Eagle Harbor,and Sleeping Bear Dunes.Generally,Chicago had the highest concentration of chlordanes,dieldrin,and DDT,indicating that urban areas could be a source for these compounds to precipitation.For gamma-HCH and endosulfans.Point Petre had the highest concentrations due to the application of these pesticides in the surrounding areas.
机译：据报道，1997年至2003年在大湖区七个综合大气沉积网络站点收集的降水样品中的有机氯农药浓度。几种农药的28天体积加权平均浓度包括y-六氯环己烷（HCH），硫丹，六氯苯，氯丹和DDE表现出明显的季节趋势。对于当前使用的农药（硫丹和丙型六氯环己烷），其浓度在农业应用后的春季末至夏季达到峰值。对于违禁农药，冬季观察到较高的浓度。 γ-六氯环己烷和DDE等几种农药的长期下降趋势得到了长期观察到的减少;另一方面，布鲁尔河的β-六氯环己烷显示出浓度随时间的显着增加。 ，鹰港和睡熊沙丘。通常，芝加哥的氯丹，狄氏剂和滴滴涕浓度最高，表明γ-六氯环己烷和硫丹的排放源是城市地区。由于这些农药在周围地区的施用，Point Petre的浓度最高。

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  • 来源
    《Environmental Science & Technology》 |2006年第7期|p.2135-2141|共7页
  • 作者

    PING SUN; SEAN BACKUS; PIERRETTE BLANCHARD; RONALD A.HITES;

  • 作者单位

    School of Public and Environmental Affairs,Indiana University,Bloomington,Indiana 47405,and Environment Canada,4905 Dufferin Street,Toronto, Ontario M3H 5T4 Canada;

    School of Public and Environmental Affairs,Indiana University,Bloomington,Indiana 47405,and Environment Canada,4905 Dufferin Street,Toronto, Ontario M3H 5T4 Canada;

    School of Public and Environmental Affairs,Indiana University,Bloomington,Indiana 47405,and Environment Canada,4905 Dufferin Street,Toronto, Ontario M3H 5T4 Canada;

    School of Public and Environmental Affairs,Indiana University,Bloomington,Indiana 47405,and Environment Canada,4905 Dufferin Street,Toronto, Ontario M3H 5T4 Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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