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首页> 外文期刊>Environmental Science & Technology >Atmospheric Emissions of Polybrominated Diphenyl Ethers and Other Persistent Organic Pollutants during a Major Anthropogenic Combustion Event
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Atmospheric Emissions of Polybrominated Diphenyl Ethers and Other Persistent Organic Pollutants during a Major Anthropogenic Combustion Event

机译：主要人为燃烧事件中多溴联苯醚和其他持久性有机污染物的大气排放

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Air samples were taken for the analysis of persistent organic pollutants before, during, and after the national U.K. "Bonfire Festival" in November 2000. As expected, ambient levels of polynuclear aromatic hydrocarbons (PAHs) increased sharply in response to the widespread diffusive combustion processes that occurred at the time. Polybrominated diphenyl ethers (PBDEs) also increased at the suburban sampling location, to a greater extent than the PAHs. The rise and fall in PBDE concentrations was rapid, coinciding closely with the PAH "combustion markers". These data provide evidence for a novel mechanism responsible for dissipation of PBDEs into the environment. It is hypothesized that products treated with the penta-BDE product-notably household furnishing foams and textiles-have been subject to (unsanctioned) burning on private bonfires; even if the majority of the PBDE burden of such products is debrominated/broken down in the fires, it is shown that only small amounts of the total "stock" of penta product need be emitted to generate the concentrations detected. The mixture of PBDEs in the air during the Bonfire Festival was enriched in higher brominated congeners (e.g., BDE-99, -153, and -154) compared to that in background air. Estimates are made of the masses of compound classes that may have been emitted to the atmosphere during the festival.
机译：在2000年11月英国全国“篝火节”之前，期间和之后，对空气样本进行了分析，以分析持久性有机污染物。正如预期的那样，由于广泛的扩散燃烧过程，多环芳烃（PAHs）的环境水平急剧增加当时发生的。多溴联苯醚（PBDEs）在郊区采样点也有所增加，其幅度大于多环芳烃。 PBDE浓度的上升和下降迅速，与PAH的“燃烧标记”密切相关。这些数据为负责将多溴二苯醚排放到环境中的新型机制提供了证据。假设使用五溴二苯醚产品处理过的产品，尤其是家用泡沫塑料和纺织品，已经在私人篝火上燃烧（未经批准）。即使此类产品的大部分PBDE负担在火灾中脱溴/分解，也显示出仅需释放五氧化二产物总“库存”中的少量即可产生所检测到的浓度。与背景空气相比，篝火节期间空气中的多溴二苯醚混合物富含较高溴化的同类物（例如BDE-99，-153和-154）。估计节日期间可能散发到大气中的化合物的质量。

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