Oxidation of herbicides by in situ synthesized hydrogen peroxide and fenton's reagent in an electrochemical flow reactor: study of the degradation of 2,4-dichlorophenoxyacetic acid

dc.creatorBadellino, C
dc.creatorRodrigues, CA
dc.creatorBertazzoli, R
dc.date2007
dc.dateAPR
dc.date2014-11-14T03:26:45Z
dc.date2015-11-26T16:04:01Z
dc.date2014-11-14T03:26:45Z
dc.date2015-11-26T16:04:01Z
dc.date.accessioned2018-03-28T22:53:13Z
dc.date.available2018-03-28T22:53:13Z
dc.identifierJournal Of Applied Electrochemistry. Springer, v. 37, n. 4, n. 451, n. 459, 2007.
dc.identifier0021-891X
dc.identifierWOS:000244689100005
dc.identifier10.1007/s10800-006-9275-z
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/81566
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/81566
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/81566
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1265400
dc.descriptionThis paper reports an investigation of H2O2 electrogeneration in a flow electrochemical reactor with RVC cathode, and the optimization of the O-2 reduction rate relative to cell potential. A study of the simultaneous oxidation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) by the in situ electrogenerated H2O2 is also reported. Experiments were performed in 0.3 M K2SO4 at pH 10 and 2.5. Maximum hydrogen peroxide generation rate was reached at -1.6 V versus Pt for both acidic and alkaline solutions. Then, 100 mg L-1 of 2,4-D was added to the solution. 2,4-D, its aromatic intermediates such as chlorophenols, chlororesorcinol and chlorinated quinone, as well as TOC were removed at different rates depending on pH, the use of UV radiation and addition of Fe(II). The acidic medium favored the hydroxylation reaction, and first order apparent rate constants for TOC removal ranged from 10(-5) to 10(-4) s(-1) stop. In the presence of UV and iron, more than 90% of TOC was removed. This value indicates that some of the intermediates derived from 2,4-D decomposition remained in solution, mainly as more biodegradable light aliphatic compounds.
dc.description37
dc.description4
dc.description451
dc.description459
dc.languageen
dc.publisherSpringer
dc.publisherDordrecht
dc.publisherHolanda
dc.relationJournal Of Applied Electrochemistry
dc.relationJ. Appl. Electrochem.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjecthydrogen peroxide
dc.subjectelectrosynthesis
dc.subjectelectro-Fenton reagent
dc.subjectoxygen reduction
dc.subject2,4-dichlorophenoxyacetic acid
dc.subjectOxygen-diffusion Cathode
dc.subjectPtfe O-2-fed Cathode
dc.subjectAqueous-solutions
dc.subjectAniline
dc.subject2,4-d
dc.subjectMineralization
dc.subjectFormaldehyde
dc.subjectRemoval
dc.subjectDestruction
dc.subjectExposure
dc.titleOxidation of herbicides by in situ synthesized hydrogen peroxide and fenton's reagent in an electrochemical flow reactor: study of the degradation of 2,4-dichlorophenoxyacetic acid
dc.typeArtículos de revistas


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