Reductive dechlorination for remediation of polychlorinated biphenyls

► Reductive methods for PCB remediation published in the last decade are reviewed. ► Catalytic HDC with H2 and Fe-based reductive dechlorination are major methods. ► The nano-technology enhances the PCB remediation efficiency. ► The supercritical fluid technology makes the process more environmental...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2012-08, Vol.88 (7), p.757-768
Main Authors: Wu, Ben-Zen, Chen, Hsiang-Yu, Wang, Shaofen J, Wai, Chien M., Liao, Weisheng, Chiu, KongHwa
Format: Article
Language:English
Subjects:
Applied sciences
Biodegradation, Environmental
Catalyst
Chlorine - chemistry
Dechlorination
Environmental Monitoring
Environmental Pollutants - chemistry
Exact sciences and technology
Global environmental pollution
Hydrogen - chemistry
Oxidation-Reduction
Pollution
Polychlorinated biphenyls (PCBs)
Polychlorinated Biphenyls - chemistry
Reduction
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Summary:► Reductive methods for PCB remediation published in the last decade are reviewed. ► Catalytic HDC with H2 and Fe-based reductive dechlorination are major methods. ► The nano-technology enhances the PCB remediation efficiency. ► The supercritical fluid technology makes the process more environmentally friendly. Technologies such as thermal, oxidative, reductive, and microbial methods for the remediation of polychlorinated biphenyls (PCBs) have previously been reviewed. Based on energy consumption, formation of PCDD/F, and remediation efficiency, reductive methods have emerged as being advantageous for remediation of PCBs. However, many new developments in this field have not been systematically reviewed. Therefore, reductive technologies published in the last decade related to remediation of PCBs will be reviewed here. Three categories, including catalytic hydrodechlorination with H2, Fe-based reductive dechlorination, and other reductive dechlorination methods (e.g., hydrogen-transfer dechlorination, base-catalyzed dechlorination, and sodium dispersion) are specifically reviewed. In addition, the advantages of each remediation technology are discussed. In this review, 108 articles are referenced.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2012.03.056