Bugarski Aleksandar D, Barone Teresa L, Hummer Jon A
National Institute for Occupational Safety and Health, Pittsburgh Mining Research Division, Pittsburgh, PA 15236, USA.
Int J Min Sci Technol. 2020 Apr;30(4):449-454. doi: 10.1016/j.ijmst.2020.05.002.
Researchers from the National Institute for Occupational Safety and Health (NIOSH) conducted a study in an isolated zone of an underground mine to characterize aerosols generated by: (1) a diesel-powered personnel carrier vehicle operated over a simulated light-duty cycle and (2) the simulated repair of existing equipment using manual metal arc welding (MMAW). Both the diesel-powered vehicle and MMAW process contributed to concentrations of nano and ultrafine aerosols in the mine air. The welding process also contributed to aerosols with electrical mobility and aerodynamic mobility count median diameters of approximately 140 and 480 nm, respectively. The welding particles collected on the filters contained carbon, iron, manganese, calcium, and aluminum.
美国国家职业安全与健康研究所（NIOSH）的研究人员在一个地下矿井的隔离区域进行了一项研究，以表征由以下情况产生的气溶胶：（1）一辆柴油动力载人运输车辆在模拟的轻型工作循环下运行；（2）使用手工金属电弧焊（MMAW）对现有设备进行模拟维修。柴油动力车辆和MMAW工艺都导致了矿井空气中纳米和超细气溶胶的浓度增加。焊接过程还产生了电迁移率和空气动力学迁移率计数中值直径分别约为140纳米和480纳米的气溶胶。过滤器上收集的焊接颗粒含有碳、铁、锰、钙和铝。
