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喷射到房子中的VOC暴露了室内环境中的大型表面储大小
Jie Yu1, Pascale S J Lakey2, Jenna C Ditto3
1Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada.
概括
室内表面显著吸收挥发性有机化合物 (VOC),作为大型储水池. 这一发现表明VOC在室内持续更长时间,影响人类健康和暴露途径.
科学领域:
- 环境化学环境化学
- 室内空气质量 室内空气质量
- 毒理学 毒理学 毒理学
背景情况:
- 人类接触室内有机污染物是通过吸入,皮肤吸收和吸尘而发生的.
- 室内表面水库的隔离能力是污染物暴露的关键因素,但仍然在很大程度上未得到量化.
- 现有的模型往往忽略了透性和多孔性材料作为污染物储存器的重要作用.
研究的目的:
- 量化室内表面储水池对挥发性有机化合物 (VOC) 的总分区能力.
- 确定主要类型的室内表面作为VOCs的储存库.
- 评估表面隔离对VOC命运和室内环境中人类暴露的影响.
主要方法:
- 在一个有良好的特征,没有人居住的试验室中进行实验.
- 注射了具有不同挥发性的VOC,并测量了它们的表面吸收动力学.
- 计算了室内表面水库的有效厚度和分区能力.
主要成果:
- 室内表面水库具有惊人的大分区容量,在微米范围内平均具有八醇等效厚度.
- 透性和多孔性材料,如油漆表面和木材被确定为主要的VOC储库,而不仅仅是薄有机薄膜.
- 具有高八醇-空气分割系数 (KOA > 10 ^ 5) 的VOC主要被隔离在这些表面储中,阻碍了通过通风去除.
结论:
- 室内表面具有相当大的吸收VOC的能力,显著影响其环境命运.
- 较大的隔离能力意味着许多有机污染物的室内居住时间比以前预测的要长.
- 这项研究需要对预测VOC行为和室内环境中人类暴露的模型进行重新评估.
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