期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Emission of particulate and gaseous pollutants from household laser processing machine
1
作者 Hyun Sik Ko Sang Bin Jeong +2 位作者 Sooyeol Phyo Jiwon Lee jae hee jung 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第5期148-156,共9页
Indoor air quality(IAQ) directly affects the health of occupants. Household manufacturing equipment(HME) used for hobbies or educational purposes is a new and unexplored source of air pollution. In this study, we eval... Indoor air quality(IAQ) directly affects the health of occupants. Household manufacturing equipment(HME) used for hobbies or educational purposes is a new and unexplored source of air pollution. In this study, we evaluated the characteristics of particulate and gaseous pollutants produced by a household laser processing equipment(HLPE). Various target materials were tested using a commercial HLPE under various operating conditions of laser power and sheath air flow rate. The mode diameters of the emitted particles gradually decreased as laser power increased, while the particle number concentration(PNC) and particle emission rate(PER) increased. In addition, as the sheath air flow rate quadrupled from 10 to 40 L/min, the mode diameter of the emitted particles decreased by nearly 25%, but the effect on the PNC was insignificant. When the laser induced the target materials at 53 m W, the mode diameters of particles were < 150 nm, and PNCs were > 2.0 × 10^(4) particles/cm^(3). Particularly, analyses of sampled aerosols indicated that harmful substances such as sulfur and barium were present in particles emitted from leather. The carcinogenic gaseous pollutants such as acrylonitrile, acetaldehyde, 1,3-butadiene, benzene, and C 8 aromatics(ethylbenzene) were emitted from all target materials. In an actual indoor environment, the PNC of inhalable ultrafine particles(UFPs) was > 5 × 10^(4) particles/cm^(3) during 30 min of HLPE operation. Our results suggest that more meticulous control methods are needed, including the use of less harmful target materials along with filters or adsorbents that prevent emission of pollutants. 展开更多
关键词 Indoor air quality(IAQ) EMISSION Laser processing Ultrafine particles(UFPs) Volatile organic compounds(VOCs)
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部