Further studies on the latitudinal and temporal trends of persistent organic pollutants in Norwegian and U.K. background air.
Further studies on the latitudinal and temporal trends of persistent organic pollutants in Norwegian and U.K. background air.
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DOI：
10.1021/es035292t
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发表时间：
2004-03
影响因子：
11.4
通讯作者：
Foday M. Jaward;S. Meijer;E. Steinnes;G. O. Thomas;K. Jones
中科院分区：
文献类型：
--
作者：
Foday M. Jaward;S. Meijer;E. Steinnes;G. O. Thomas;K. Jones
本报告提供了多溴联苯醚、多氯联苯和某些有机氯化合物的数据，这些数据是通过被动空气采样器（半透膜装置）沿英国南部沿着一个纬度断面在背景位置测量的。在2000-2002年期间，挪威北部。这项工作是正在进行的空气采样活动的一部分，其中多氯联苯数据是在1994-1996年和1998-2000年获得的。在这些不同的时间间隔的SPMD隔离的化学品的质量的比较被用来调查空间和时间的趋势。该研究提供了随纬度增加、减少或保持一致的化合物实例，表明沉积与大气反应在控制其远距离大气迁移潜力方面的相对重要性存在差异。在联合王国，检测到五溴二苯醚产品的主要成分含量相当于2.0（范围1.1-2.5）和1.1（0.8-1.6）皮克/立方米。和挪威的背景网站，分别。观察到多溴二苯醚的分馏现象，因为较轻的溴二苯醚的数量随着纬度的增加而减少，而较重的分子量同系物则分布得相当均匀。与此相反，较轻的多氯联苯的螯合量均匀分布的纬度，与较重的多氯联苯减少。六氯苯的螯合量随纬度的增加而增加。初步的多氯联苯大气清除率是根据1994-1996年、1998-2000年和2000-2002年的数据得出的。他们平均约。3.5所有同系物/地点的年数。没有发现同源物或位置的系统性差异，这支持了欧洲背景空气的基本趋势仍然受主要来源而不是次要来源控制的假设。
Data are presented for PBDEs, PCBs, and selected organochlorine compounds, measured at background locations by passive air samplers (semipermeable membrane devices, SPMDs) along a latitudinal transect from the south of the U.K. to the north of Norway during 2000-2002. This work is part of an ongoing air sampling campaign in which PCB data were previously obtained in 1994-1996 and 1998-2000. Comparisons of the masses of chemicals sequestered by the SPMDs during these different time intervals are used to investigate spatial and temporal trends. The study yielded examples of compounds that increase, decrease, or remain uniform with latitude, suggestive of differences in the relative importance of deposition versus atmospheric reaction in controlling their long-range atmospheric transport potential. The main constituents of the penta-BDE product were detected at amounts equivalent to 2.0 (range 1.1-2.5) and 1.1 (0.8-1.6) pg m(-3) for the U.K. and Norway background sites, respectively. Fractionation of PBDEs was observed, because the amounts of lighter BDEs decreased with latitude, while the heavier molecular weight congeners were quite uniformly distributed. In contrast, the sequestered amounts of the lighter PCBs were uniformly distributed with latitude, with heavier PCBs decreasing. Sequestered amounts of hexachlorobenzene increased with latitude. Preliminary PCB atmospheric clearance rates were derived using the 1994-1996, 1998-2000, and 2000-2002 data. They averaged ca. 3.5 years for all congeners/locations. No systematic differences in congeners or locations were noted, supporting the hypothesis that the underlying trends in European background air are still controlled by primary, rather than secondary, sources.