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首页> 外文期刊>Environmental Science & Technology >Quantifying Hazardous Species in Particulate Matter Derived from Fossil-Fuel Combustion
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Quantifying Hazardous Species in Particulate Matter Derived from Fossil-Fuel Combustion

机译：量化化石燃料燃烧产生的颗粒物中的有害物质

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摘要

An analysis protocol that combines X-ray absorption near-edge structure spectroscopy with selective leaching has been developed to examine hazardous species in size-segregated particulate matter (PM) samples derived from the combustion of fossil fuels. The protocol has been used to identify and determine quantitatively the amounts of three important toxic species in combustion-derived PM: viz., nickel sulfides in residual oil fly ash (ROFA) PM, and Cr(VI) and As(lll) species in coal fly ash PM. Although it has been assumed that these toxic species might exist in PM derived from fossil-fuel combustion, the results presented here constitute the first direct determination of them in combustion-derived PM and their potential bioavailability. Detailed information on the presence of these toxic species in PM samples is of significant interest to epidemiological and toxicological studies of the health effects of both source and ambient PM. Additionally, information is obtained on insoluble forms that may be useful for source attribution and on the distribution of phases between size fractions that may be related to formation mechanisms of specific toxic species during combustion.
机译：已经开发出一种将X射线吸收近边缘结构光谱学与选择性浸出相结合的分析方案，以检查源自化石燃料燃烧的大小分离的颗粒物（PM）样品中的有害物质。该协议已被用于鉴定和定量确定燃烧性PM中三种重要有毒物质的数量：即残留油飞灰（ROFA）PM中的硫化镍以及Cr（VI）和As（III）物质。粉煤灰PM。尽管已经假定这些有毒物质可能存在于化石燃料燃烧后的PM中，但此处给出的结果构成了在燃烧衍生的PM中及其潜在生物利用度的第一个直接测定方法。有关PM样品中这些有毒物种的存在的详细信息，对于流行病学和毒理学研究中有关源PM和周围PM的健康影响具有重大意义。另外，获得关于不溶形式的信息，其可用于来源归因，以及关于尺寸分数之间的相的分布，这可能与燃烧期间特定毒性物质的形成机理有关。

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