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首页> 外文期刊>Environmental Science & Technology >Surface Emissions Modulate Indoor SVOC Concentrations through Volatility-Dependent Partitioning
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Surface Emissions Modulate Indoor SVOC Concentrations through Volatility-Dependent Partitioning

机译：表面排放通过依赖依赖性分区调制室内SVOC浓度

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摘要

Measurements by semivolatile thermal desorption aerosol gas chromatography (SV-TAG) were used to investigate how semivolatile organic compounds (SVOCs) partition among indoor reservoirs in (1) a manufactured test house under controlled conditions (HOMEChem campaign) and (2) a single-family residence when vacant (H2 campaign). Data for phthalate diesters and siloxanes suggest that volatility-dependent partitioning processes modulate airborne SVOC concentrations through interactions with surface-laden condensed-phase reservoirs. Airborne concentrations of SVOCs with vapor pressures in the range of C13 to C23 alkanes were observed to be correlated with indoor air temperature. Observed temperature dependencies were quantitatively similar to theoretical predictions that assumed a surface-air boundary layer with equilibrium partitioning maintained at the air-surface interface. Airborne concentrations of SVOCs with vapor pressures corresponding to C25 to C31 alkanes correlated with airborne particle mass concentration. For SVOCs with higher vapor pressures, which are expected to be predominantly gaseous, correlations with particle mass concentration were weak or nonexistent. During primary particle emission events, enhanced gas-phase emissions from condensed-phase reservoirs partitioned to airborne particles, contributing substantially to organic particulate matter. An emission event related to oven-usage was inferred to deposit siloxanes in condensed-phase reservoirs throughout the house, leading to the possibility of reemission during subsequent periods with high particle loading.
机译：通过半抗体热解吸气溶胶气相色谱（SV标签）测量来研究在（1）在受控条件（HomeChem竞选）和（2）下的制造测试房屋中的室内储层中的半抗生素有机化合物（SVOCS）分区如何以及（2）单一 - 空置时的家庭​​住所（H2竞选活动）。邻苯二甲酸酯二酯和硅氧烷的数据表明，挥发性依赖性分配过程通过与表面升温相储存器的相互作用调节空气传播的SVOC浓度。观察到C13至C23烷烃范围内具有蒸汽压力的SVOC的空气浓度与室内空气温度相关。观察到的温度依赖性与具有在空气表面界面处保持平衡分配的表面空气边界层的理论预测是定量的。具有与空气颗粒质量浓度的C25至C31烷基对应于C25至C31烷基的蒸汽压力的空气传播浓度。对于具有更高蒸气压力的SVOC，预期呈主要气态，与颗粒质量浓度的相关性弱或不存在。在一次颗粒发射事件中，从分配给空气颗粒的冷凝相储存器的增强的气相排放，基本上促进有机颗粒物质。推断出与烤箱用法相关的排放事件在整个房屋中沉积在冷凝相储存器中的硅氧烷，导致在随后的颗粒载荷的后续期间进行治疗的可能性。

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  • 来源
    《Environmental Science & Technology》 |2020年第11期|6751-6760|共10页
  • 作者

    David M. Lunderberg; Kasper Kristensen; Yilin Tian; Caleb Arata; Pawel K. Misztal; Yingjun Liu; Nathan Kreisberg; Erin F. Katz; Peter F. DeCarlo; Sameer Patel; Marina E. Vance; William W Nazaroff; Allen H. Goldstein;

  • 作者单位

    Department of Chemistry and Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States;

    Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States;

    Department of Environmental Science Policy and Management and Department of Civil and Environmental Engineering University of California Berkeley California 94720 United States;

    Department of Chemistry and Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States;

    Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States;

    Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States;

    Aerosol Dynamics Inc. Berkeley California 94710 United States;

    Department of Chemistry Drexel University Philadelphia Pennsylvania 19104 United States;

    Department of Environmental Health and Engineering Johns Hopkins University Baltimore Maryland 21218 United States;

    Department of Mechanical Engineering University of Colorado Boulder Boulder Colorado 80309 United States;

    Department of Mechanical Engineering University of Colorado Boulder Boulder Colorado 80309 United States;

    Department of Civil and Environmental Engineering University of California Berkeley California 94720 United States;

    Department of Environmental Science Policy and Management and Department of Civil and Environmental Engineering University of California Berkeley California 94720 United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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