title: Leaching behaviour and environmental risk assessment of heavy metals from electronic solder in acidified soil.
abstract: The leaching behaviour of Sn and Pb elements from eutectic SnPb solder of electronic waste in acidic soil was investigated through acidification with HCl-H2SO4 solution and compared with saline solution. The amounts of Sn and Pb elements leached, when subjected to acidic soil, are higher than those with saline soil. Evidence for the significantly preferential release of Sn into the leachate is provided; the galvanic couple accelerated such preferential release. Surface product analysis reveals the slight damage of SnPb in saline soil. Serious dissolution due to electrochemical reaction and a thick, porous PbSO4 surface layer are observed in acidified soil, suggesting more severe toxicity potential of Pb in soil rather than in water.
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China.|School of Physics and Electromechanical Engineering, Zhoukou Normal University, Zhoukou, 466000, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Lao
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Congqian
authors.initials: C
authors.lastname: Cheng
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Min
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China. jiezhao@dlut.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China.
authors.forename: Dayu
authors.initials: D
authors.lastname: Zhou
authors.affiliation: Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Li
mesh_terms: D059029:Electronic Waste / Q000032:analysis; D007854:Lead / Q000032:analysis*; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014001:Tin / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D007854:Lead; D014001:Tin; C032722:lead sulfate
keywords: Acidified soil; Electronic solder; ICP-MS; Leaching