Bohne J E, Cohen B S
Am Ind Hyg Assoc J. 1985 Feb;46(2):73-9. doi: 10.1080/15298668591394428.
The fabric used for work clothing at an industrial site can significantly influence personal monitor (PM) exposure estimates because dust resuspension from clothing can increase the concentration at the sampler inlet. The magnitude of the effect depends on removal forces and on the interaction of the contaminant particles with work garments. Aerosol deposition and resuspension on cotton and Nomex aramid fabrics was evaluated at a beryllium refinery. Electrostatically charged cotton backdrops collected more beryllium than neutral controls, but electronegative Nomex backdrops did not. Moving fabrics collected more beryllium than did stationary controls. When contaminated fabrics were agitated, PMs mounted 2.5 cm in front of the fabric collected more beryllium than monitors above the fabric, positioned to simulate the nose or mouth. The difference between the air concentrations measured by these PMs increased with Be loading and tended to level off for highly contaminated fabric. Cotton resuspended a larger fraction of its contaminant load than Nomex. These results are consistent with current knowledge of the behavior of particles on fabric fibers. Aerosol resuspension from garments is an important consideration in assessing inhalation exposure to toxic dusts. A garment may attract and retain toxic particles. This contamination is then available for later resuspension.
工业场所工作服装所用的织物会显著影响个人监测器（PM）的暴露估计值，因为衣物上的灰尘再悬浮会增加采样器入口处的浓度。影响的程度取决于去除力以及污染物颗粒与工作服的相互作用。在一家铍精炼厂对棉织物和Nomex芳纶织物上的气溶胶沉积和再悬浮情况进行了评估。带静电的棉质背景收集到的铍比中性对照物更多，但带负电的Nomex背景则不然。移动的织物收集到的铍比静止的对照物更多。当对受污染的织物进行搅动时，位于织物前方2.5厘米处的个人监测器收集到的铍比位于织物上方模拟鼻子或嘴巴位置的监测器更多。这些个人监测器测得的空气浓度差异随铍负载量增加而增大，对于高度受污染的织物，该差异趋于平稳。棉织物再悬浮的污染物负载比例比Nomex织物更大。这些结果与目前关于颗粒在织物纤维上行为的认识一致。在评估吸入有毒粉尘的暴露情况时，衣物上的气溶胶再悬浮是一个重要的考虑因素。衣物可能会吸引并留住有毒颗粒。这些污染物随后可供后续再悬浮。
