title: The cytotoxic and genetoxic effects of dust and soil samples from E-waste recycling area on L02 cells.
abstract: Electrical and electronic waste (E-waste) has now become the fastest growing solid waste around the world. Primitive recycling operations for E-waste have resulted in severe contamination of toxic metals and organic chemicals in the related areas. In this study, six dust and soil samples collected from E-waste recycling workshops and open-burning sites in Longtang were analyzed to investigate their cytotoxicity and genotoxicity on L02 cells. These six samples were: dust No. 1 collected at the gate of the workshop; dust No. 2 collected from air conditioning compressor dismantling site; dust No. 3 collected from where some motors, wires, and aluminium products since the 1980s were dismantled; soil No. 1 collected at the circuit board acid washing site; soil No. 2 collected from a wire open-burning site; soil No. 3 collected near a fiber open-burning site. At the same time, two control soil samples were collected from farmlands approximately 8 km away from the dismantling workshops. The results showed that all of these samples could inhibit cell proliferation and cause cell membrane lesion, among which dust No. 3 and soil No. 2 had the strongest toxicity. Moreover, the comet assay showed that the dust No. 3 had the most significant capability to cause DNA single-strand beaks (SSB), while the road dust (dust No. 1) collected at the gate of the workshop, a relatively farer site, showed the slightest capability to induce DNA SSB. The intracellular reactive oxygen species (ROS) detection showed that ROS level was elevated with the increase of dust and soil samples concentration. Dust No. 3 and soil No. 2 had the highest ROS level, followed by dust No. 2 and 1, soil No. 3 and 1. All of the above results indicated that polluted soil and dust from the E-waste area had cytotoxicity and genotoxicity on L02 cells, the mechanism might involve the increased ROS level and consequent DNA SSB.
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China.
authors.forename: Liulin
authors.initials: L
authors.lastname: Wang
authors.forename: Meiling
authors.initials: M
authors.lastname: Hou
authors.forename: Jing
authors.initials: J
authors.lastname: An
authors.forename: Yufang
authors.initials: Y
authors.lastname: Zhong
authors.forename: Xuetong
authors.initials: X
authors.lastname: Wang
authors.forename: Yangjun
authors.initials: Y
authors.lastname: Wang
authors.forename: Minghong
authors.initials: M
authors.lastname: Wu
authors.forename: Xinhui
authors.initials: X
authors.lastname: Bi
authors.forename: Guoying
authors.initials: G
authors.lastname: Sheng
authors.forename: Jiamo
authors.initials: J
authors.lastname: Fu
mesh_terms: D002460:Cell Line; D002462:Cell Membrane / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D002681:China; D020552:Comet Assay; D053904:DNA Breaks, Single-Stranded / Q000187:drug effects; D004391:Dust; D059029:Electronic Waste / Q000009:adverse effects*; D006801:Humans; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D009153:Mutagens / Q000633:toxicity*; D017382:Reactive Oxygen Species / Q000378:metabolism; D059027:Recycling; D012987:Soil; D012989:Soil Pollutants / Q000633:toxicity*
chemical_list: D004391:Dust; D009153:Mutagens; D017382:Reactive Oxygen Species; D012987:Soil; D012989:Soil Pollutants