High Magnetic Property and Toxicity of Particulate Matter Generated during Welding and Cutting Processes  

作　　者：Wei Cui Zizhen Ma Yuanzheng Chen Shuya Li Di Wu Xiu Chen Yuankai Shao Yuzhe Liu Qing Li Jianmin Chen 

机构地区：[1]Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Department of Environmental Science and Engineering,Fudan University,Shanghai 200433,China [2]School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China [3]Shanghai Institute of Eco-Chongming(SIEC),Shanghai 200062,China [4]National Engineering Laboratory for Mobile Source Emission Control Technology,China Automotive Technology&Research Center Co.,Ltd,Tianjin 300300,China

出　　处：《Environment & Health》2024年第6期381-389,共9页环境与健康（英文）

基　　金：supported by the National Natural Science Foundation of China(T2122006,U22A20405,92143301,and 22106081);China Postdoctoral Science Foundation(BX20220088 and 2022M710741).

摘　　要：Magnetic particulate matter(PM)has raised increasing concern due to its abundant presence in ambient air and negative health impact.However,there is still a lack of comprehensive understanding of their emission sources and toxicities.We here report the observation of high magnetic property and toxicity of PM generated during typical welding and cutting processes.Magnetite,formed during high-temperature operation with less oxygen pressure,was revealed to be the major magnetic contributor.The averaged saturation magnetization and magnetic susceptibility values of fine PM(PM_(2.5))from welding processes are 1.4−4.2 times greater than those of PM emitted from other unintended emission sources,including iron and steel plants and brake wear,while they are 2.0−5.7 times greater for the cutting processes.Furthermore,PM_(2.5)from welding and cutting processes are nearly 3.5−4.5 times more neurovirulent and 2.1−7.0 times more likely to induce oxidative stress than those from other magnetic sources in the nerve cells lines.Moreover,all of these magnetic PM_(2.5)exhibit greater negative health effects than typical atmospheric PM_(2.5)collected in Shanghai urban regions.These new findings suggest that appropriate occupational protection measures should be implemented for the welding and cutting process to reduce adverse health impacts.

关 键 词：pollutant emission magnetic property particulate matters MAGNETITE welding and cutting 

分 类 号：X51[环境科学与工程—环境工程]