| Title: | Emission of particulate and gaseous pollutants from household laser processing machine |
| Author(s): | Ko HS; Jeong SB; Phyo S; Lee J; Jung JH; |
| Address: | "Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea; Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Graduate School of Energy and Environment, Korea University, Seoul 02841, Republic of Korea. Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Graduate School of Energy and Environment, Korea University, Seoul 02841, Republic of Korea. Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea. Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea. Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea. Electronic address: jaehee@sejong.ac.kr" |
| DOI: | 10.1016/j.jes.2020.10.018 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "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 mW, the mode diameters of particles were <150 nm, and PNCs were >2.0 x 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 x 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" |
| Keywords: | "*Air Pollutants/analysis *Air Pollution, Indoor/analysis Environmental Monitoring *Environmental Pollutants Gases Lasers Particle Size Particulate Matter/analysis Emission Indoor air quality (IAQ) Laser processing Ultrafine particles (UFPs) Volatile organ;" |
| Notes: | "MedlineKo, Hyun Sik Jeong, Sang Bin Phyo, Sooyeol Lee, Jiwon Jung, Jae Hee eng Netherlands 2021/03/22 J Environ Sci (China). 2021 May; 103:148-156. doi: 10.1016/j.jes.2020.10.018. Epub 2020 Nov 16" |
