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首页> 美国卫生研究院文献>PLoS Clinical Trials >Emission characteristics of diethylhexyl phthalate (DEHP) from building materials determined using a passive flux sampler and micro-chamber
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Emission characteristics of diethylhexyl phthalate (DEHP) from building materials determined using a passive flux sampler and micro-chamber

机译：使用无源通量采样器和微腔室测定的邻苯二甲酸二乙基己酯（DEHP）的建筑材料排放特性

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摘要

Emission rates of diethylhexyl phthalate (DEHP) from building materials, such as vinyl floorings and wall paper, determined using a passive flux sampler (PFS) were constant over the week-long measurement period. Emission rates for vinyl floorings and wallpaper were linearly correlated to the inverse of diffusion distance, which corresponds to the internal depth of the PFS. Surface-air DEHP concentrations (y0) were estimated as 1.3–2.3 μg/m3 for materials having a boundary layer molecular diffusion rate-limiting step. The partition coefficient (Kmaterial-air) was estimated as 3.3–7.5 × 1010 for these materials. Additionally, emission rates of DEHP from same building materials determined using a micro-chamber were 4.5–6.1 μg/m2/h. Mass transfer coefficients in the micro-chamber (hm) were estimated by comparing the results using the PFS and micro-chamber, and these were 1.1–1.2 × 10−3 and 8.1 × 10−4 m/s for vinyl floorings (smooth surface) and wallpaper (rough surface), respectively. The thickness of boundary layer on the surface of building materials in the micro-chamber were estimated to be 2.5–2.6 and 3.7 mm for vinyl floorings and wallpaper, respectively.
机译：使用被动式通量采样器（PFS）确定的建筑材料（例如，乙烯基地板和墙纸）中邻苯二甲酸二乙基己酯（DEHP）的排放速率在一周的测量期内保持恒定。乙烯基地板和墙纸的排放速率与扩散距离的倒数线性相关，扩散距离与PFS的内部深度相对应。对于具有边界层分子扩散速率限制步骤的材料，表面空气的DEHP浓度（y0）估计为1.3–2.3μg/ m 3 。这些材料的分配系数（Kmaterial-air）估计为3.3–7.5×10 10 。此外，使用微腔室测定的相同建筑材料中DEHP的排放速率为4.5–6.1μg/ m 2 / h。通过使用PFS和微腔室比较结果来估算微腔中的传质系数（hm），它们是1.1–1.2×10 -3 和8.1×10 -乙烯基地板（光滑表面）和墙纸（粗糙表面）的速度分别为4 m / s。对于微型地板和墙纸，微室中建筑材料表面的边界层厚度估计分别为2.5-2.6和3.7 mm。

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