Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 302, Issue -, Pages 395-403Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2015.10.006
Keywords
VOCs; E-waste dismantling; Advanced oxidation technologies; Integrated EP-PC-ozonation technique; Risk assessment
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Funding
- Science and Technology Project of Guangdong Province, China [2012A032300017, 20138091500084]
- Cooperation Projects of the Chinese Academy of Science
- Foshan Government [2012HY100101]
- Natural Science Foundation of Guangdong Province, China [S2012030006604]
- NSFC [41425015, 41373102, 21307132]
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Volatile organic compounds (VOCs) emitted during the electronic waste dismantling process (EWDP) were treated at a pilot scale, using integrated electrostatic precipitation (EP)-advanced oxidation technologies (AOTs, subsequent photocatalysis (PC) and ozonation). Although no obvious alteration was seen in VOC concentration and composition, EP technology removed 47.2% of total suspended particles, greatly reducing the negative effect of particles on subsequent AOTs. After the AOT treatment, average removal efficiencies of 95.7%, 95.4%, 87.4%, and 97.5% were achieved for aromatic hydrocarbons, aliphatic hydrocarbons, halogenated hydrocarbons, as well as nitrogen- and oxygen-containing compounds, respectively, over 60-day treatment period. Furthermore, high elimination capacities were also seen using hybrid technique of PC with ozonation; this was due to the PC unit's high loading rates and excellent pre-treatment abilities, and the ozonation unit's high elimination capacity. In addition, the non-cancer and cancer risks, as well as the occupational exposure cancer risk, for workers exposed to emitted VOCs in workshop were reduced dramatically after the integrated technique treatment. Results demonstrated that the integrated technique led to highly efficient and stable VOC removal from EWDP emissions at a pilot scale. This study points to an efficient approach for atmospheric purification and improving human health in e-waste recycling regions. (C) 2015 Elsevier B.V. All rights reserved.
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