Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China; Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
Chemosphere. 2021 Jul;275:130022. doi: 10.1016/j.chemosphere.2021.130022. Epub 2021 Feb 20.
The dismantling of electrical and electronic waste (e-waste) can release various Volatile organic compounds (VOCs), impacting the surrounding ambient environment. We investigated the spatio-temporal characteristics and health risks of the ambient VOCs emitted in a typical e-waste dismantling region by conducting multi-site sampling campaigns in four seasons. The pollution of benzene, toluene, ethylbenzene, and xylenes (BTEX) in the e-waste dismantling park has relation to e-waste dismantling by seasonal trend analysis. The highest concentrations of most VOCs occurred in winter and autumn, while the lowest levels were observed in summer and spring. The spatial distribution map revealed the e-waste dismantling park to be a hotspot of BTEX, 1,2-dichloropropane (1,2-DCP), and 1,2-dichloroethane (1,2-DCA), while two major residential areas were also the hotspots of BTEX. The e-waste emission source contributed 20.14% to the total VOCs in the e-waste dismantling park, while it was absent in the major residential and rural areas. The cancer risk assessment showed that six VOCs exceeded 1.0 × 10 in the e-waste dismantling park, while only three or four compounds exceeded this risk in other areas. The noncancer risks of all compounds were below the safety threshold. This study supplements the existing knowledge on VOC pollution from e-waste dismantling and expands the research scope of chemical pollution caused by e-waste.
电子废物（e-waste）的拆解会释放出各种挥发性有机化合物（VOCs），从而影响周围的环境。我们通过在四个季节进行多地点采样活动，研究了典型电子废物拆解区环境 VOCs 的时空特征和健康风险。苯、甲苯、乙苯和二甲苯（BTEX）在电子废物拆解园区的污染与按季节的趋势分析拆解电子废物有关。大多数 VOCs 的最高浓度出现在冬季和秋季，而最低水平则出现在夏季和春季。空间分布图谱显示，电子废物拆解园区是 BTEX、1,2-二氯丙烷（1,2-DCP）和 1,2-二氯乙烷（1,2-DCA）的热点地区，而两个主要居民区也是 BTEX 的热点地区。电子废物排放源对电子废物拆解园区内总 VOCs 的贡献率为 20.14%，而在主要居民区和农村地区则不存在。癌症风险评估表明，在电子废物拆解园区内，有六种 VOCs 的风险超过 1.0×10，而在其他地区，只有三四种化合物的风险超过这一水平。所有化合物的非癌症风险均低于安全阈值。本研究补充了电子废物拆解过程中 VOC 污染的现有知识，并扩展了电子废物引起的化学污染的研究范围。
