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

Degradation 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 followe...

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Autores principales:	Baeza,Carolina, Oviedo,Claudia, Zaror,Claudio, Rodríguez,Jaime, Freer,Juanita
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2007
Materias:	AOTs UV/H2O2 treatment EDTA effluent treatment TCF effluent
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072007000100003
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spelling	oai:scielo:S0717-970720070001000032007-05-07DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENTBaeza,CarolinaOviedo,ClaudiaZaror,ClaudioRodríguez,JaimeFreer,Juanita AOTs UV/H2O2 treatment EDTA effluent treatment TCF effluent Degradation 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 treatmentinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.52 n.1 20072007-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072007000100003en10.4067/S0717-97072007000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	AOTs UV/H2O2 treatment EDTA effluent treatment TCF effluent
spellingShingle	AOTs UV/H2O2 treatment EDTA effluent treatment TCF effluent Baeza,Carolina Oviedo,Claudia Zaror,Claudio Rodríguez,Jaime Freer,Juanita DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
description	Degradation 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
author	Baeza,Carolina Oviedo,Claudia Zaror,Claudio Rodríguez,Jaime Freer,Juanita
author_facet	Baeza,Carolina Oviedo,Claudia Zaror,Claudio Rodríguez,Jaime Freer,Juanita
author_sort	Baeza,Carolina
title	DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
title_short	DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
title_full	DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
title_fullStr	DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
title_full_unstemmed	DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT
title_sort	degradation of edta in a total chlorine free cellulose pulp bleaching effluent by uv/h2o2 treatment
publisher	Sociedad Chilena de Química
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072007000100003
work_keys_str_mv	AT baezacarolina degradationofedtainatotalchlorinefreecellulosepulpbleachingeffluentbyuvh2o2treatment AT oviedoclaudia degradationofedtainatotalchlorinefreecellulosepulpbleachingeffluentbyuvh2o2treatment AT zarorclaudio degradationofedtainatotalchlorinefreecellulosepulpbleachingeffluentbyuvh2o2treatment AT rodriguezjaime degradationofedtainatotalchlorinefreecellulosepulpbleachingeffluentbyuvh2o2treatment AT freerjuanita degradationofedtainatotalchlorinefreecellulosepulpbleachingeffluentbyuvh2o2treatment
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DEGRADATION OF EDTA IN A TOTAL CHLORINE FREE CELLULOSE PULP BLEACHING EFFLUENT BY UV/H2O2 TREATMENT

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