Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.jhazmat.2007.06.020
DC Field | Value | |
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dc.title | Photodegradation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans: Direct photolysis and photocatalysis processes | |
dc.contributor.author | Wu, C.-H. | |
dc.contributor.author | Ng, H.-Y. | |
dc.date.accessioned | 2014-10-08T08:33:17Z | |
dc.date.available | 2014-10-08T08:33:17Z | |
dc.date.issued | 2008-03-01 | |
dc.identifier.citation | Wu, C.-H., Ng, H.-Y. (2008-03-01). Photodegradation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans: Direct photolysis and photocatalysis processes. Journal of Hazardous Materials 151 (2-3) : 507-514. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jhazmat.2007.06.020 | |
dc.identifier.issn | 03043894 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/87590 | |
dc.description.abstract | This study employed direct photolysis to treat mixed polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) solutions. The solutions included a synthetic standard 17 2, 3, 7, 8-substituted congeners solution and a practical liquid extracted from the bag filter ash of an electric arc furnace. Additionally, this work utilized a coupled catalyst (ZnO/SnO2) under UV irradiation for photocatalytic degradation of 1, 2, 3, 6, 7, 8-HxCDD and OCDD. The direct photolysis rate of PCDFs was faster than that of PCDDs. The degradation rate of international toxicity equivalency quantity (I-TEQ) for PCDDs and PCDFs in the synthetic standard solution was 1.369 and 1.472 h-1, respectively, and that in the ash-extracted solution was 0.061 and 0.117 h-1, respectively. The rate of photocatalytic degradation declined as the number of chlorine atoms increased. No 2, 3, 7, 8-substituted congeners were identified during photocatalytic degradation; additionally, the photolytic rate of the UV/coupled catalyst was higher than that of UV/single catalyst system. Experimental results suggested that the primary degradation pathway for direct photolysis and photocatalysis of PCDD/Fs was the C{single bond}Cl cleavage and C{single bond}O cleavage, respectively. © 2007 Elsevier B.V. All rights reserved. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jhazmat.2007.06.020 | |
dc.source | Scopus | |
dc.subject | Coupled catalyst | |
dc.subject | Direct photolysis | |
dc.subject | PCDD/Fs | |
dc.subject | Photocatalysis | |
dc.type | Article | |
dc.contributor.department | DIVISION OF ENVIRONMENTAL SCIENCE & ENGG | |
dc.description.doi | 10.1016/j.jhazmat.2007.06.020 | |
dc.description.sourcetitle | Journal of Hazardous Materials | |
dc.description.volume | 151 | |
dc.description.issue | 2-3 | |
dc.description.page | 507-514 | |
dc.description.coden | JHMAD | |
dc.identifier.isiut | 000253829200026 | |
Appears in Collections: | Staff Publications |
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