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Degradation and decolorization of a biodegradable-resistant polymeric dye by chelator-mediated Fenton reactions.
Chemosphere. 2006 Jun; 63(10):1764-72.C

Abstract

Chelator-mediated Fenton reactions (CMFRs) were used to decolorize a biodegradable-resistant polymeric dye (Poly R-478). Screening of different iron chelators was performed on Fe(3+)-reduction activity. All chelators showed Fe(3+)-reduction activity over a wide range of pH (2-7) and each mol of catecholate chelators (3,4-dihydroxiphenilacetic acid--DOPAC and 2,3-dihydroxibenzoic acid--DHBA) reduced about 5-6 moles of Fe(3+) whereas hydroxamate chelators (acetohydroxamic acid-AHA and desferrioxamine B-DFB) reduced Fe(3+) stoichiometrically. The most effective decolorization of Poly R-478 was achieved by CMFR using catecholate chelators. In addition, a 2(4) factorial design was performed with the aim of evaluating the effects of the variables considered in this study (pH, [DOPAC], [Fe(3+)] and [H(2)O(2)]) and optimizing the dye decolorization, using response surface methodology. Statistical analysis of results showed that, in the range studied, except for Fe(3+), all variables have a significant effect on dye decolorization. A second-order model is proposed to represent the Poly R-478 decolorization. At optimum conditions, complete decolorization of the dye (degradation of the chromophoric group) and also complete chemical degradation of the dye was observed.

Authors+Show Affiliations

Department of Biotechnology, Faculdade de Engenharia Química de Lorena-FAENQUIL, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16289212

Citation

Arantes, Valdeir, et al. "Degradation and Decolorization of a Biodegradable-resistant Polymeric Dye By Chelator-mediated Fenton Reactions." Chemosphere, vol. 63, no. 10, 2006, pp. 1764-72.
Arantes V, Baldocchi C, Milagres AM. Degradation and decolorization of a biodegradable-resistant polymeric dye by chelator-mediated Fenton reactions. Chemosphere. 2006;63(10):1764-72.
Arantes, V., Baldocchi, C., & Milagres, A. M. (2006). Degradation and decolorization of a biodegradable-resistant polymeric dye by chelator-mediated Fenton reactions. Chemosphere, 63(10), 1764-72.
Arantes V, Baldocchi C, Milagres AM. Degradation and Decolorization of a Biodegradable-resistant Polymeric Dye By Chelator-mediated Fenton Reactions. Chemosphere. 2006;63(10):1764-72. PubMed PMID: 16289212.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation and decolorization of a biodegradable-resistant polymeric dye by chelator-mediated Fenton reactions. AU - Arantes,Valdeir, AU - Baldocchi,Carolina, AU - Milagres,Adriane Maria Ferreira, Y1 - 2005/11/09/ PY - 2005/07/28/received PY - 2005/09/16/revised PY - 2005/09/19/accepted PY - 2005/11/18/pubmed PY - 2006/8/19/medline PY - 2005/11/18/entrez SP - 1764 EP - 72 JF - Chemosphere JO - Chemosphere VL - 63 IS - 10 N2 - Chelator-mediated Fenton reactions (CMFRs) were used to decolorize a biodegradable-resistant polymeric dye (Poly R-478). Screening of different iron chelators was performed on Fe(3+)-reduction activity. All chelators showed Fe(3+)-reduction activity over a wide range of pH (2-7) and each mol of catecholate chelators (3,4-dihydroxiphenilacetic acid--DOPAC and 2,3-dihydroxibenzoic acid--DHBA) reduced about 5-6 moles of Fe(3+) whereas hydroxamate chelators (acetohydroxamic acid-AHA and desferrioxamine B-DFB) reduced Fe(3+) stoichiometrically. The most effective decolorization of Poly R-478 was achieved by CMFR using catecholate chelators. In addition, a 2(4) factorial design was performed with the aim of evaluating the effects of the variables considered in this study (pH, [DOPAC], [Fe(3+)] and [H(2)O(2)]) and optimizing the dye decolorization, using response surface methodology. Statistical analysis of results showed that, in the range studied, except for Fe(3+), all variables have a significant effect on dye decolorization. A second-order model is proposed to represent the Poly R-478 decolorization. At optimum conditions, complete decolorization of the dye (degradation of the chromophoric group) and also complete chemical degradation of the dye was observed. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/16289212/Degradation_and_decolorization_of_a_biodegradable_resistant_polymeric_dye_by_chelator_mediated_Fenton_reactions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(05)01124-0 DB - PRIME DP - Unbound Medicine ER -