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Article: Degradation of melatonin by UV, UV/H2O2, Fe2+/H2O2 and UV/Fe2+/H2O2 processes

TitleDegradation of melatonin by UV, UV/H2O2, Fe2+/H2O2 and UV/Fe2+/H2O2 processes
Authors
KeywordsAdvanced oxidation processes
Comparison
Degradation
Kinetics
Melatonin
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppur
Citation
Separation And Purification Technology, 2009, v. 68 n. 2, p. 261-266 How to Cite?
AbstractMelatonin is a hormone, which may suppress the production of testosterone, decrease semen quality, and affect sexual activity and reproduction of animals and humans. Degradation of melatonin in aqueous solutions were investigated and compared by different advanced oxidation processes, including ultraviolet radiation (UV) alone, ultraviolet radiation assisted by hydrogen peroxide (UV/H2O2), Fenton's reagents (Fe2+/H2O2), and combination of Fenton's reagent with UV light (photo-Fenton, UV/H2O2/Fe2+). The experiments were conducted in a laboratory-scale batch photoreactor equipped with a 8 W low-pressure mercury lamp. The degradation of melatonin by all these processes was found to follow pseudo-first-order reaction kinetics. The effect of pH on the degradation of melatonin in the UV irradiation process was studied, and found that removal efficiencies of melatonin were 18%, 28% and 32% at 60 min and the rate constants were 0.0018, 0.0030 and 0.0048 min-1 at pH value of 4.0, 7.0 and 10.0, respectively. The degradation efficiency of melatonin was greatly enhanced by UV/H2O2 process. Furthermore, effects of operating parameters (pH and concentrations of Fe2+ and H2O2) on the degradation of melatonin by Fenton's reagent were investigated, and the degradation of melatonin was more efficient by Fenton's reagent than by UV/H2O2 process. The fastest degradation of melatonin and highest TOC removal was achieved by UV/Fe2+/H2O2 process among the four different processes tested. © 2009 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/71689
ISSN
2015 Impact Factor: 3.299
2015 SCImago Journal Rankings: 1.100
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Polytechnic UniversityG-YXOM
CRCG (The University of Hong Kong Committee on Research and Conference Grants)
Funding Information:

This research was partially supported by the Postdoctoral Fellowship from The Hong Kong Polytechnic University (project no: G-YXOM), and the CRCG (The University of Hong Kong Committee on Research and Conference Grants).

References

 

DC FieldValueLanguage
dc.contributor.authorXu, XRen_HK
dc.contributor.authorLi, XYen_HK
dc.contributor.authorLi, XZen_HK
dc.contributor.authorLi, HBen_HK
dc.date.accessioned2010-09-06T06:34:16Z-
dc.date.available2010-09-06T06:34:16Z-
dc.date.issued2009en_HK
dc.identifier.citationSeparation And Purification Technology, 2009, v. 68 n. 2, p. 261-266en_HK
dc.identifier.issn1383-5866en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71689-
dc.description.abstractMelatonin is a hormone, which may suppress the production of testosterone, decrease semen quality, and affect sexual activity and reproduction of animals and humans. Degradation of melatonin in aqueous solutions were investigated and compared by different advanced oxidation processes, including ultraviolet radiation (UV) alone, ultraviolet radiation assisted by hydrogen peroxide (UV/H2O2), Fenton's reagents (Fe2+/H2O2), and combination of Fenton's reagent with UV light (photo-Fenton, UV/H2O2/Fe2+). The experiments were conducted in a laboratory-scale batch photoreactor equipped with a 8 W low-pressure mercury lamp. The degradation of melatonin by all these processes was found to follow pseudo-first-order reaction kinetics. The effect of pH on the degradation of melatonin in the UV irradiation process was studied, and found that removal efficiencies of melatonin were 18%, 28% and 32% at 60 min and the rate constants were 0.0018, 0.0030 and 0.0048 min-1 at pH value of 4.0, 7.0 and 10.0, respectively. The degradation efficiency of melatonin was greatly enhanced by UV/H2O2 process. Furthermore, effects of operating parameters (pH and concentrations of Fe2+ and H2O2) on the degradation of melatonin by Fenton's reagent were investigated, and the degradation of melatonin was more efficient by Fenton's reagent than by UV/H2O2 process. The fastest degradation of melatonin and highest TOC removal was achieved by UV/Fe2+/H2O2 process among the four different processes tested. © 2009 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppuren_HK
dc.relation.ispartofSeparation and Purification Technologyen_HK
dc.subjectAdvanced oxidation processesen_HK
dc.subjectComparisonen_HK
dc.subjectDegradationen_HK
dc.subjectKineticsen_HK
dc.subjectMelatoninen_HK
dc.titleDegradation of melatonin by UV, UV/H2O2, Fe2+/H2O2 and UV/Fe2+/H2O2 processesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1383-5866&volume=68&spage=261&epage=266&date=2009&atitle=Degradation+of+melatonin+by+UV,+UV/H2O2,+Fe2+/H2O2+and+UV/Fe2+/H2O2+processesen_HK
dc.identifier.emailLi, XY:xlia@hkucc.hku.hken_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.seppur.2009.05.013en_HK
dc.identifier.scopuseid_2-s2.0-67650127114en_HK
dc.identifier.hkuros164566en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67650127114&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume68en_HK
dc.identifier.issue2en_HK
dc.identifier.spage261en_HK
dc.identifier.epage266en_HK
dc.identifier.isiWOS:000268648200021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridXu, XR=7405293882en_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK
dc.identifier.scopusauthoridLi, XZ=24436480000en_HK
dc.identifier.scopusauthoridLi, HB=25649944400en_HK
dc.identifier.citeulike5188697-

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