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Time dependence of characteristic parameter for semi-volatile organic compounds (SVOCs) emitted from indoor materials

机译：室内材料散发的半挥发性有机化合物（SVOC）特征参数的时间依赖性

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摘要

Semi-volatile organic compounds (SVOCs) are widely used in various indoor materials and their adverse health effects have been increasingly recognized. The gas-phase SVOC concentration in equilibrium with the source material (y(0)), as a characteristic parameter for SVOC sources, is mostly assumed to be constant in previous studies. However, decreases in y(0) with time have been observed in some studies. As a first step to reveal the mechanism behind the phenomenon, this study quantitatively investigated the variation of y(0) over time under two conditions: natural exposure to outdoor ambient (Case 1), and storage in a controlled ventilated chamber (Case 2). Three phthalates (Di-iso-butyl Phthalate (DiBP), Di-n-butyl Phthalate (DnBP), and di-(2-ethylhexyl) phthalate (DEHP)) emitted from polyvinyl chloride (PVC) floorings and one flame retardant (tris(2-chloroisopropyl) phosphate, TCPP) emitted from polyurethane foam (PUF) were targeted. Experimental results indicated that, for SVOCs with higher volatility, i.e., DiBP, DnBP, and TCPP, y(0) decreased 16%49% after 60 days' exposure for Case 1; and 16%36% for Case 2. For SVOCs with lower volatility, i.e., DEHP, no significant decrease in y(0) was observed after 60 days in both cases; while if prolonging the time to about 1.5 years, a decrease of 38% was observed. Discussion about potential reasons for the decrease of y(0) was presented. The results obtained here provide a further understanding about SVOC source characteristics and therefore help providing source strength for estimating indoor SVOC health exposure. (C) 2017 Elsevier Ltd. All rights reserved.
机译：半挥发性有机化合物（SVOC）广泛用于各种室内材料中，其不良健康影响已得到越来越多的认识。在以前的研究中，大多数情况下都假定与原料（y（0））处于平衡状态的气相SVOC浓度是SVOC的特征参数。但是，在某些研究中观察到y（0）随时间减少。作为揭示该现象背后机理的第一步，本研究定量研究了在以下两种情况下y（0）随时间的变化：自然暴露在室外环境中（案例1）和存储在受控通风室内（案例2） 。从聚氯乙烯（PVC）地板中散发出的三种邻苯二甲酸酯（邻苯二甲酸二异丁酯（DiBP），邻苯二甲酸二正丁酯（DnBP）和邻苯二甲酸二（2-乙基己基）邻苯二甲酸酯（DEHP））和一种阻燃剂（tris目标是从聚氨酯泡沫（PUF）排放的（2-氯异丙基）磷酸（TCPP）。实验结果表明，对于案例1暴露60天后，对于挥发性较高的SVOC，即DiBP，DnBP和TCPP，y（0）降低了16％49％。对于案例2，则为16％36％。对于挥发性较低的SVOC，即DEHP，两种情况在60天后均未观察到y（0）的显着降低。如果将时间延长到1.5年左右，则可以减少38％。提出了关于y（0）减小的潜在原因的讨论。此处获得的结果提供了关于SVOC来源特征的进一步理解，因此有助于提供用于估算室内SVOC健康暴露的来源强度。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Building and Environment》 |2017年第11期|339-347|共9页
  • 作者

    Pei Jingjing; Yin Yihui; Cao Jianping; Sun Yahong; Liu Junjie; Zhang Yinping;

  • 作者单位

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300072, Peoples R China;

    Tsinghua Univ, Dept Bldg Sci, Beijing 100084, Peoples R China|Beijing Key Lab Indoor Air Qual Evaluat & Control, Beijing 100084, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300072, Peoples R China;

    Tsinghua Univ, Dept Bldg Sci, Beijing 100084, Peoples R China|Beijing Key Lab Indoor Air Qual Evaluat & Control, Beijing 100084, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Indoor air quality; SVOC source; Emission characteristic; Vapor pressure; Flame retardants;

    机译：室内空气质量;SVOC源;排放特性;蒸气压;阻燃剂;

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