Pesticides in the atmosphere of the Mississippi River Valley, part II - air
Pesticides in the atmosphere of the Mississippi River Valley, part II - air
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DOI：
10.1016/s0048-9697(99)00544-6
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发表时间：
2000-04-05
影响因子：
9.8
通讯作者：
Coupe, RH
中科院分区：
文献类型：
--
作者：
Foreman, WT;Majewski, MS;Coupe, RH
从1995年4月初到9月中旬，每周在美国中西部密西西比河地区的三个城市和农业地点收集复合空气样本。配对的采样地点分别位于密西西比州、爱荷华州和明尼苏达州。背景场地远离密集的城市和农业区，位于密歇根州苏必利尔湖岸边。每个样品分析了49种化合物；其中，26种除草剂中有21种被检测到，19种杀虫剂中有13种被检测到，4种相关转化产物中有4种被检测到，其中大多数农药在一个以上的样本中被检测到。在空气样本中检测到的农药的最大数量为18。除草剂是各站点检测到的优势农药类型。在爱荷华州和明尼苏达州的城市和农业场所，大多数除草剂的检测频率相似。在密西西比州，除草剂通常在农业现场更频繁地被检测到。在密西西比州和爱荷华州，用于农业和非农业环境的杀虫剂毒死蜱、二嗪农和西威因在城市场所的检测频率高于农业场所。在密西西比州农业现场70%的样品中检测到甲基对硫磷，并且在研究中测量的所有杀虫剂中浓度最高（62 ng/m(3)）。在背景位点，最常检测到的是达格尔（100%）、阿特拉津（35%）、氰嗪（22%）和（主要是阿特拉津）三嗪转化产物CIAT（35%）和CEAT(17%)，表明它们具有远距离大气迁移的潜力。(C) 2000 Elsevier Science B.V.版权所有
Weekly composite air samples were collected from early April through to mid-September 1995 at three paired urban and agricultural sites along the Mississippi River region of the Midwestern United States. The paired sampling sites were located in Mississippi, Iowa, and Minnesota. A background site, removed from dense urban and agricultural areas, was located on the shore of Lake Superior in Michigan. Each sample was analyzed for 49 compounds; of these, 21 of 26 herbicides, 13 of 19 insecticides, and 4 of 4 related transformation products were detected during the study, with most pesticides detected in more than one sample. The maximum number of pesticides detected in an air sample was 18. Herbicides were the predominant type of pesticide detected at every site. Detection frequencies of most herbicides were similar at the urban and agricultural sites in Iowa and Minnesota. In Mississippi, herbicides generally were detected more frequently at the agricultural site. The insecticides chlorpyrifos, diazinon, and carbaryl, which are used in agricultural and non-agricultural settings, were detected more frequently in urban sites than agricultural sites in Mississippi and Iowa. Methyl parathion was detected in 70% of the samples from the Mississippi agricultural site and at the highest concentration (62 ng/m(3) air) of any insecticide measured in the study. At the background site, dacthal (100%), atrazine (35%), cyanazine (22%), and the (primarily atrazine) triazine transformation products CIAT (35%) and CEAT (17%) were detected most frequently, suggesting their potential for Long-range atmospheric transport. (C) 2000 Elsevier Science B.V. All rights reserved.