National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark.
National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark.
J Hazard Mater. 2018 Jan 5;341:218-227. doi: 10.1016/j.jhazmat.2017.07.045. Epub 2017 Jul 29.
Here, we studied the particle release rate during Electrostatic spray deposition of anatase-(TiO)-based photoactive coating onto tiles and wallpaper using a commercially available electrostatic spray device. Spraying was performed in a 20.3m test chamber while measuring concentrations of 5.6nm to 31μm-size particles and volatile organic compounds (VOC), as well as particle deposition onto room surfaces and on the spray gun user hand. The particle emission and deposition rates were quantified using aerosol mass balance modelling. The geometric mean particle number emission rate was 1.9×10s and the mean mass emission rate was 381μgs. The respirable mass emission-rate was 65% lower than observed for the entire measured size-range. The mass emission rates were linearly scalable (±ca. 20%) to the process duration. The particle deposition rates were up to 15h for <1μm-size and the deposited particles consisted of mainly TiO, TiO mixed with Cl and/or Ag, TiO particles coated with carbon, and Ag particles with size ranging from 60nm to ca. 5μm. As expected, no significant VOC emissions were observed as a result of spraying. Finally, we provide recommendations for exposure model parameterization.
在这里，我们使用市售的静电喷雾设备，研究了锐钛矿-(TiO)-基光活性涂层在瓷砖和壁纸上电喷雾沉积过程中的颗粒释放速率。在 20.3m 的测试室中进行喷雾，同时测量 5.6nm 至 31μm 粒径的颗粒和挥发性有机化合物 (VOC) 的浓度，以及颗粒在房间表面和喷枪使用者手上的沉积。使用气溶胶质量平衡模型对颗粒排放和沉积速率进行定量。几何平均颗粒数排放率为 1.9×10s，平均质量排放率为 381μgs。可吸入质量排放率比整个测量粒径范围内观察到的低 65%。质量排放率与过程持续时间呈线性比例关系（±约 20%）。对于 <1μm 粒径的颗粒，沉积速率高达 15h，沉积的颗粒主要由 TiO、TiO 与 Cl 和/或 Ag 混合、涂有碳的 TiO 颗粒以及粒径为 60nm 至约 5μm 的 Ag 颗粒组成。不出所料，由于喷雾没有观察到明显的 VOC 排放。最后，我们为暴露模型参数化提供了建议。
