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Leaching behaviour and environmental risk assessment of heavy metals from electronic solder in acidified soil

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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.

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Acknowledgments

The authors wish to acknowledge the financial support of the National Science and Technology Basic Project of the Ministry of Science and Technology of China (No. 2012FY11300), National Natural Science Foundation of China (NNSFC) under the granted (No. 51171037, No. 51134013 and No. 51101024) and the Science Research Fund of Henan Provincial Education Department (No. 14B430009).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Xiaodong Lao, Congqian Cheng, Xiaohua Min, Jie Zhao & Dayu Zhou

  2. School of Physics and Electromechanical Engineering, Zhoukou Normal University, Zhoukou, 466000, China

    Xiaodong Lao

  3. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083, China

    Xiaogang Li

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  1. Xiaodong Lao
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  2. Congqian Cheng
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  3. Xiaohua Min
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  4. Jie Zhao
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  5. Dayu Zhou
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  6. Xiaogang Li
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Correspondence to Jie Zhao.

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Responsible editor: Zhihong Xu

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Lao, X., Cheng, C., Min, X. et al. Leaching behaviour and environmental risk assessment of heavy metals from electronic solder in acidified soil. Environ Sci Pollut Res 22, 17683–17690 (2015). https://doi.org/10.1007/s11356-015-4868-x

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  • DOI: https://doi.org/10.1007/s11356-015-4868-x

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