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DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT.

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dc.creatorCLAUDIA ANDREA OVIEDO SILVA
dc.date2007
dc.date.accessioned2025-01-10T14:35:51Z
dc.date.available2025-01-10T14:35:51Z
dc.date.issued2007
dc.description.abstractDEGRADATION OF EDTA IN A TOTAL CHLORINE FREE (TCF) CELLULOSE PULP BLEACHING EFFLUENT, USING UV AND UV/H2O2 IN PRESENCE AND ABSENCE OF IRON, WAS STUDIED. ALL EXPERIENCES WERE CONDUCTED IN AN ANNULAR PHOTOLYTIC REACTOR AT PH 9, 20°C, AND 0.38 MM (110 MGL-1) EDTA CONCENTRATION. EDTA DEGRADATION FOLLOWED A FIRST ORDER APPARENT KINETICS, WITH RATE CONSTANT IN THE RANGE OF 0.02?0.72 MIN-1, DEPENDING ON THE INITIAL HYDROGEN PEROXIDE CONCENTRATION AND IRON CONTENT. UV TREATMENT WITHOUT PEROXIDE YIELDED 100 % DEGRADATION OF FE(III)-EDTA IN 40 MINUTES OF REACTION, BUT LOW COD (8 %) AND TOC (13 %) REMOVAL. PEROXIDE ADDITION (3.3 MM)INCREASED FE(III)-EDTA DEGRADATION RATES BY UV TREATMENT, RESULTING IN 100% REMOVAL AFTER 20 MINUTES, AND GREATER COD (28 %) AND TOC (36 %) REDUCTIONS. IN ABSENCE OF IRON, PEROXIDE ADDITION WAS REQUIRED TO OBTAIN EDTA DEGRADATIONYIELDS ABOVE 50% AFTER 1 H TREATMENT. RESULTS PRESENTED HERE SHOW THAT UV/H2O2 TREATMENT COULD BE SUITABLE AS A PRELIMINARY STAGE BEFORE A BIOLOGICAL TREATMENT.
dc.formatapplication/pdf
dc.identifier.doihttp://dx.doi.org/10.4067/S0717-97072007000100003
dc.identifier.issn0717-9707
dc.identifier.issn0717-9707
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/8124
dc.languagespa
dc.publisherJOURNAL OF THE CHILEAN CHEMICAL SOCIETY
dc.relation.urihttp://dx.doi.org/10.4067/S0717-97072007000100003
dc.rightsPUBLICADA
dc.subjectUV/H2O2 treatment
dc.subjectTCF effluent.
dc.subjecteffluent treatment
dc.subjectEDTA
dc.subjectAOTs
dc.titleDEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT.
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE QUIMICA
ubb.SedeCONCEPCIÓN
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