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Efficient decolorization of azo dye Reactive Black B involving aromatic fragment degradation in buffered Co2+/PMS oxidative processes with a ppb level dosage of Co2+-catalyst.
J Hazard Mater. 2009 Oct 30; 170(2-3):1110-8.JH

Abstract

In order to generate powerful radicals as oxidizing species for the complete decolorization and degradation of azo dye Reactive Black B (RBB) at near neutral pH (pH 6), homogeneous activation of peroxymonosulfate (Oxone: PMS) by the trace Co2+-catalysts was explored. We not only took advantage of the high oxidation-reduction potential of produced hydroxyl and sulfite radicals but also an opportunity to oxidize RBB to less complex compounds with extremely low dosages, especially the ppb level of the Co2+-catalyst (stoichiometric ratio: [Co2+](0)/[RBB](0)=1.7 x 10(-6)-1.7 x 10(-5); [PMS](0)/[RBB](0)=8-32). Anion effects and pH effects were also carried out and discussed to simulate an actual application such as that of a textile waste stream. Both the degradations of RBB and its derivative aromatic fragments were illustrated successfully at UV-visable absorptions of 591 and 310 nm, respectively, and the possible relationships between them were also proposed and discussed, based on the experimental results. The RBB degradation in this Co2+/PMS oxidative process successfully formulated a pseudo-first-order kinetic model at an isothermal condition of 25 degrees C with or without different anions present. The initial rate and rate constant were calculated under different comparative conditions, and the results indicate that the activity of both RBB decolorization and its degradation are not obviously dependent on the PMS concentration, but rather are related to the Co2+ dosage.

Authors+Show Affiliations

Department of Chemical Engineering, National Cheng Kung University, Tainan City 701, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19541412

Citation

Huang, Yao-Hui, et al. "Efficient Decolorization of Azo Dye Reactive Black B Involving Aromatic Fragment Degradation in Buffered Co2+/PMS Oxidative Processes With a Ppb Level Dosage of Co2+-catalyst." Journal of Hazardous Materials, vol. 170, no. 2-3, 2009, pp. 1110-8.
Huang YH, Huang YF, Huang CI, et al. Efficient decolorization of azo dye Reactive Black B involving aromatic fragment degradation in buffered Co2+/PMS oxidative processes with a ppb level dosage of Co2+-catalyst. J Hazard Mater. 2009;170(2-3):1110-8.
Huang, Y. H., Huang, Y. F., Huang, C. I., & Chen, C. Y. (2009). Efficient decolorization of azo dye Reactive Black B involving aromatic fragment degradation in buffered Co2+/PMS oxidative processes with a ppb level dosage of Co2+-catalyst. Journal of Hazardous Materials, 170(2-3), 1110-8. https://doi.org/10.1016/j.jhazmat.2009.05.091
Huang YH, et al. Efficient Decolorization of Azo Dye Reactive Black B Involving Aromatic Fragment Degradation in Buffered Co2+/PMS Oxidative Processes With a Ppb Level Dosage of Co2+-catalyst. J Hazard Mater. 2009 Oct 30;170(2-3):1110-8. PubMed PMID: 19541412.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient decolorization of azo dye Reactive Black B involving aromatic fragment degradation in buffered Co2+/PMS oxidative processes with a ppb level dosage of Co2+-catalyst. AU - Huang,Yao-Hui, AU - Huang,Yi-Fong, AU - Huang,Chun-Ing, AU - Chen,Chuh-Yung, Y1 - 2009/05/22/ PY - 2008/12/23/received PY - 2009/04/20/revised PY - 2009/05/19/accepted PY - 2009/6/23/entrez PY - 2009/6/23/pubmed PY - 2009/12/16/medline SP - 1110 EP - 8 JF - Journal of hazardous materials JO - J Hazard Mater VL - 170 IS - 2-3 N2 - In order to generate powerful radicals as oxidizing species for the complete decolorization and degradation of azo dye Reactive Black B (RBB) at near neutral pH (pH 6), homogeneous activation of peroxymonosulfate (Oxone: PMS) by the trace Co2+-catalysts was explored. We not only took advantage of the high oxidation-reduction potential of produced hydroxyl and sulfite radicals but also an opportunity to oxidize RBB to less complex compounds with extremely low dosages, especially the ppb level of the Co2+-catalyst (stoichiometric ratio: [Co2+](0)/[RBB](0)=1.7 x 10(-6)-1.7 x 10(-5); [PMS](0)/[RBB](0)=8-32). Anion effects and pH effects were also carried out and discussed to simulate an actual application such as that of a textile waste stream. Both the degradations of RBB and its derivative aromatic fragments were illustrated successfully at UV-visable absorptions of 591 and 310 nm, respectively, and the possible relationships between them were also proposed and discussed, based on the experimental results. The RBB degradation in this Co2+/PMS oxidative process successfully formulated a pseudo-first-order kinetic model at an isothermal condition of 25 degrees C with or without different anions present. The initial rate and rate constant were calculated under different comparative conditions, and the results indicate that the activity of both RBB decolorization and its degradation are not obviously dependent on the PMS concentration, but rather are related to the Co2+ dosage. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19541412/Efficient_decolorization_of_azo_dye_Reactive_Black_B_involving_aromatic_fragment_degradation_in_buffered_Co2+/PMS_oxidative_processes_with_a_ppb_level_dosage_of_Co2+_catalyst_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00851-6 DB - PRIME DP - Unbound Medicine ER -