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首页> 外文期刊>The Science of the Total Environment >Proximity to chemical equilibria among air, water, soil, and sediment as varied with partition coefficients: A case study of poly chlorinated dibenzodioxins/furans, polybrominated diphenyl ethers, phthalates, and polycyclic aromatic hydrocarbons.
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Proximity to chemical equilibria among air, water, soil, and sediment as varied with partition coefficients: A case study of poly chlorinated dibenzodioxins/furans, polybrominated diphenyl ethers, phthalates, and polycyclic aromatic hydrocarbons.

机译：空气，水，土壤和沉积物之间化学平衡的接近程度随分配系数的变化而变化：以多氯代二苯并二恶英/呋喃，多溴代二苯醚，邻苯二甲酸酯和多环芳烃为例。

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To capture the pollutant distribution status among environmental media and to understand how the distribution varies with the pollutants' properties, we assessed a total of 225 fugacity ratios (FRs) of 45 semi-volatile organic compounds (SVOCs) (polychlorinated dibenzo-p-dioxins/furans (PCDDs/Fs), polybrominated diphenyl ethers (PBDEs), phthalates, and polycydic aromatic hydrocarbons (PAHs)) for five medium pairs (air-water, air-soil, water-sediment, soil-water, and soil-sediment) using the nationwide multimedia monitoring data. For many of the pollutants, fugacity was greatest in air (PCDFs and 6 heavy PAHs) and in sediment (PBDEs and 9 light PAHs) while lowest in soil for most of the pollutants. PAHs and phthalates appeared to be farther away from equilibrium than PCDDs/Fs and PBDEs. The ratios of "equilibrium improbable FRs to all the FRs in each chemical group were 2%, 0%, 33.3%, and 28.9% for PCDDs/Fs, PBDEs, phthalates, and PAHs, respectively. FRwater/air of PHAS, FRsoil/air and FRsediment/water of the pollutant groups (except for PBDEs) decreased significantly (p 0.01) with the partition coefficients, 1/K-air/water (1/K-aw), K-octanol/air (K-oa), and K-octanol/water (K-ow), respectively, even in the field conditions. The findings on FRs values provide valuable clues to identifying the media that would act as sink or source for certain chemicals and to using a more appropriate choice in the coherence test of environmental quality objectives, which should be important considerations in the management of chemical contamination in the environment. (C) 2019 Elsevier B.V. All rights reserved.
机译：为了捕获环境介质中的污染物分布状况并了解污染物的分布如何变化，我们评估了45种半挥发性有机化合物（SVOC）（多氯二苯并对二恶英）的225逸度比（FR）。 /呋喃（PCDDs / Fs），多溴二苯醚（PBDEs），邻苯二甲酸盐和多环芳烃（PAHs）用于五种介质对（空气，水，土壤，水沉积物，土壤水和土壤沉积物） ）使用全国范围的多媒体监控数据。对于许多污染物而言，空气（PCDF和6种重金属PAHs）和沉积物（PBDEs和9种轻质PAHs）中的逸度最高，而大多数污染物在土壤中的逸度最低。 PAHs和邻苯二甲酸酯似乎比PCDDs / Fs和PBDEs更远离平衡。对于每个化学类别，“不可能平衡的FR”与所有FR的比率分别为PCDDs / Fs，PBDEs，邻苯二甲酸盐和PAHs的2％，0％，33.3％和28.9％。FRwater / PHAS的空气/ FRsoil污染物类别（多溴二苯醚除外）的/空气和FRsediment /水显着下降（p <0.01），分配系数为1 / K-空气/水（1 / K-aw），K-辛醇/空气（K- oa）和K-辛醇/水（K-ow），甚至在田间条件下FRs值的发现也提供了宝贵的线索，可用于确定充当某些化学物质的汇入或来源的介质，并使用更多在环境质量目标一致性测试中的适当选择，这应该是管理环境中化学污染的重要考虑因素（C）2019 Elsevier BV保留所有权利。

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