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Article: Electrochemical wastewater disinfection: Identification of its principal germicidal actions

TitleElectrochemical wastewater disinfection: Identification of its principal germicidal actions
Authors
KeywordsChlorination
Disinfection
Ozonization
Wastewater treatment
Issue Date2004
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html
Citation
Journal of Environmental Engineering, 2004, v. 130 n. 10, p. 1217-1221 How to Cite?
AbstractLaboratory experiments were carried out to investigate the mechanisms of electrochemical (EC) wastewater disinfection. Artificial wastewater contaminated by Escherichia coli (E. coli) culture, and which contained different salts of NaCl, Na 2SO 4, and NaNO 3, was used as the test medium. The experimental results do not favor the hypotheses that the EC bactericidal action was due to cell destruction by the electric field and the production of persulfate. In comparison to direct chlorination, the EC process displayed a much stronger disinfecting capability than that of electrochlorination assumed for EC disinfection. Observations with scanning electron microscopy on the E. coli bacteria of wastewater treated by different means of disinfection suggested that the cells were likely killed during the EC treatment by chemical products with oxidizing and germicidal powers similar to that of ozone and much stronger than that of chlorine. All of the findings support the theory that the major killing function of EC disinfection is provided by short-lived and high-energy intermediate EC products, such as free radicals. © ASCE.
Persistent Identifierhttp://hdl.handle.net/10722/150678
ISSN
2015 Impact Factor: 1.125
2015 SCImago Journal Rankings: 0.462
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, XYen_HK
dc.contributor.authorDiao, HFen_HK
dc.contributor.authorFan, XJen_HK
dc.contributor.authorGu, Jen_HK
dc.contributor.authorDing, Fen_HK
dc.contributor.authorTong, ASFen_HK
dc.date.accessioned2012-06-26T06:06:43Z-
dc.date.available2012-06-26T06:06:43Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal of Environmental Engineering, 2004, v. 130 n. 10, p. 1217-1221en_HK
dc.identifier.issn0733-9372en_HK
dc.identifier.urihttp://hdl.handle.net/10722/150678-
dc.description.abstractLaboratory experiments were carried out to investigate the mechanisms of electrochemical (EC) wastewater disinfection. Artificial wastewater contaminated by Escherichia coli (E. coli) culture, and which contained different salts of NaCl, Na 2SO 4, and NaNO 3, was used as the test medium. The experimental results do not favor the hypotheses that the EC bactericidal action was due to cell destruction by the electric field and the production of persulfate. In comparison to direct chlorination, the EC process displayed a much stronger disinfecting capability than that of electrochlorination assumed for EC disinfection. Observations with scanning electron microscopy on the E. coli bacteria of wastewater treated by different means of disinfection suggested that the cells were likely killed during the EC treatment by chemical products with oxidizing and germicidal powers similar to that of ozone and much stronger than that of chlorine. All of the findings support the theory that the major killing function of EC disinfection is provided by short-lived and high-energy intermediate EC products, such as free radicals. © ASCE.en_HK
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.htmlen_HK
dc.relation.ispartofJournal of Environmental Engineeringen_HK
dc.rightsJournal of Environmental Engineering. Copyright © American Society of Civil Engineers.-
dc.subjectChlorinationen_HK
dc.subjectDisinfectionen_HK
dc.subjectOzonizationen_HK
dc.subjectWastewater treatmenten_HK
dc.titleElectrochemical wastewater disinfection: Identification of its principal germicidal actionsen_HK
dc.typeArticleen_HK
dc.identifier.emailLi, XY: xlia@hkucc.hku.hken_HK
dc.identifier.emailGu, J: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1061/(ASCE)0733-9372(2004)130:10(1217)en_HK
dc.identifier.scopuseid_2-s2.0-8744291720en_HK
dc.identifier.hkuros98022-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-8744291720&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume130en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1217en_HK
dc.identifier.epage1221en_HK
dc.identifier.isiWOS:000224677600017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK
dc.identifier.scopusauthoridDiao, HF=7004492029en_HK
dc.identifier.scopusauthoridFan, FXJ=7102227619en_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK
dc.identifier.scopusauthoridDing, F=55167806900en_HK
dc.identifier.scopusauthoridTong, ASF=7103351478en_HK

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