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Time trends of atmospheric PBDEs inferred from archived UK herbage

机译:从已归档的英国牧草推断出的大气多溴二苯醚的时间趋势

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Aerial portions of vegetation receive the bulk of their burden of persistent organic pollutants (POPS) from the atmosphere. Vegetation can therefore be a useful indicator of the changing atmospheric burden of POPS. Samples of archived pasture, collected from Rothamsted Experimental Station in the United Kingdom between 1930 and 2004, were analyzed for a range of polybrominated diphenyl ethers (PBDEs). PBDEs could not be routinely detected in the pre-1970 samples. Thereafter, the dominant congeners BDE 28, 47, 49, 99, 100, 153, 154, and 183 were frequently detected. The general trend was (a) a rise through the 1970s; (b) a minipeak in the mid-1980s, strongly influenced by one particularly high sample for 1984; (c) values remaining high through the late 1980s/1990s; (d) an indication of a more recent decline for all congeners (except BDE-28), consistent with recent restrictions on PBDE usage in Europe. These trends were compared to recent modeled estimates of U.K. PBDE emissions. The congener profiles of technical mixtures, U.K. air, soil, and pasture were compared and shown to be broadly similar. The implications for environmental release mechanisms are discussed.
机译:植被的空中部分从大气中吸收了大部分持久性有机污染物(POPS)。因此,植被可以成为POPS大气负荷变化的有用指标。从1930年至2004年从英国Rothamsted实验站收集的存档牧场样本进行了分析,以分析一系列多溴联苯醚(PBDEs)。在1970年前的样本中无法常规检测到多溴二苯醚。此后,经常检测到主要同源物BDE 28、47、49、99、100、153、154和183。总的趋势是(a)到1970年代有所上升; (b)1980年代中期的一个小峰,受到1984年一个特别高的样本的强烈影响; (c)整个1980年代/ 1990年代后期的价值仍然很高; (d)表明所有同类产品(BDE-28除外)最近都有下降,这与欧洲最近对多溴二苯醚使用的限制相一致。将这些趋势与英国PBDE排放的最新模型估算值进行了比较。比较了工业混合物,英国空气,土壤和牧场的同类产品,并显示出大致相似。讨论了对环境释放机制的影响。

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