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首页> 外文期刊>Environmental Science & Technology >Occurrence and Relationship of Organophosphorus Insecticides and Their Degradation Products in the Atmosphere in Western Canada Agricultural Regions
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Occurrence and Relationship of Organophosphorus Insecticides and Their Degradation Products in the Atmosphere in Western Canada Agricultural Regions

机译：加拿大西部农业区大气中有机磷杀虫剂及其降解产物的发生与关系

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摘要

This paper presents the atmospheric occurrence and seasonal variations of the most frequently detected organophosphorus insecticides (OPs) and their OP oxon degradation products at Bran's Lake, Saskatchewan in the Canadian Prairies (April 2003 to March 2004, January-December,2005) and at Abbotsford in the Lower Frazer Valley (LFV) of British Columbia from May 2004 to December, 2005. During 2005 there were 10 OPs, 8 OP oxons, and 6 other OP degradation products measured. The most frequently detected OPs were chlorpyrifos, malathion, and diazinon. At Bratt's Lake the highest atmospheric concentrations were observed for chlorpyrifos, with maximum concentrations observed during July and August in 2003 showing much higher concentrations than those from 2005. This was related to its usage for grasshopper control in the province. At Abbotsford, diazinon and malathion were observed in much higher atmospheric concentrations than chlorpyrifos. Concentrations reached maximum in spring for diazinon and summer for malathion. This study is the first reported study of seasonal variations of OP oxons with their parent OP. Chlorpyrifos oxon concentrations during July were generally low, indicating strong local source contributions. The chlorpyrifos oxon/chlorpyrifos ratio and diazinon oxon/diazinon ratio showed a strong seasonal variation with increasing ratio from spring to summer which was attributed to increasing sunlight hours. Malathion oxon/mathion at both sites was similar and relatively constant throughout the year. The oxon/thion ratio represents a good indicator of age of source or contributions from local versus regional atmospheric sources.
机译：本文介绍了加拿大大草原萨斯喀彻温省布兰湖（2003年4月至2004年3月，2005年1月至12月）和阿伯茨福德最常见的有机磷杀虫剂（OPs）及其OP oxon降解产物在大气中的发生和季节变化。 2004年5月至2005年12月，在不列颠哥伦比亚省的下弗雷泽河谷（LFV）进行了测量。在2005年期间，测量了10种OP，8种OP氧子和6种其他OP降解产物。最常检测到的OP是毒死rif，马拉硫磷和二嗪农。在布雷特湖观察到毒死rif的最高大气浓度，2003年7月和8月观测到的最高浓度比2005年的最高浓度高得多。这与该省用于控制蝗虫有关。在阿伯茨福德，观测到的二嗪农和马拉硫磷的大气浓度比毒死rif高得多。二嗪农的春季浓度最高，马拉硫磷的夏季浓度最高。这项研究是第一个报道的OP氧子及其父代OP季节性变化的研究。 7月份毒死rif的牛氧化物浓度普遍较低，表明当地来源的贡献很大。从春季到夏季，毒死rif /毒死and比和二嗪农/重氮比表现出强烈的季节变化，这归因于日照时间的增加。全年中，两个地点的马拉硫磷/氟甲烷类似且相对恒定。 oxon / thion比率很好地指示了源的年龄或本地对区域大气源的贡献。

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  • 来源
    《Environmental Science & Technology》 |2010年第22期|p.8541-8546|共6页
  • 作者

    RENATA RAINA; PATRICIA HALL; LINA SUN;

  • 作者单位

    Department of Chemistry and Biochemistry, and Trace Analysis Facility, University of Regina, Regina, Saskatchewan S4S 0A2, Canada;

    Department of Chemistry and Biochemistry, and Trace Analysis Facility, University of Regina, Regina, Saskatchewan S4S 0A2, Canada;

    Department of Chemistry and Biochemistry, and Trace Analysis Facility, University of Regina, Regina, Saskatchewan S4S 0A2, 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);
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