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Carbonate-activated hydrogen peroxide oxidation process for azo dye decolorization: Process, kinetics, and mechanisms.
Chemosphere. 2018 Feb; 192:372-378.C

Abstract

Advanced oxidation processes offer effective solutions in treating wastewater from various industries. This study is the first time to investigate the potential of carbonate-activated hydrogen peroxide (CAP) oxidation process for the removal of organic pollutant from highly alkaline wastewaters. Azo dye acid orange 7 (AO7) was selected as a model pollutant. The influences of various parameters on AO7 decolorization by the CAP oxidation were evaluated. Furthermore, the active species involved in AO7 degradation were explored using scavenger experiments and electron spin resonance analysis. Additionally, AO7 degradation products by the CAP oxidation were identified to elucidate possible transformation pathways. Results showed that the CAP oxidation had better AO7 decolorization performance compared to bicarbonate-activated hydrogen peroxide method. The AO7 decolorization efficiency augmented from 3.70 ± 0.76% to 54.27 ± 2.65% when carbonate concentration was increased from 0 to 50 mM at pH 13.0, and then changed slightly with further increasing carbonate concentration to 70 mM. It increased almost linearly from 5.95 ± 0.32% to 94.03 ± 0.39% as H2O2 concentration was increased from 5 to 50 mM. Moreover, trace amount of Co(II) could facilitate AO7 decolorization by the CAP reaction. Superoxide and carbonate radicals might be the main reactive oxygen species involved in the CAP process. Finally, a possible degradation pathway of AO7 by the CAP oxidation was proposed based on the identified products.

Authors+Show Affiliations

CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, China. Electronic address: yangmu@ustc.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29121567

Citation

Li, Yang, et al. "Carbonate-activated Hydrogen Peroxide Oxidation Process for Azo Dye Decolorization: Process, Kinetics, and Mechanisms." Chemosphere, vol. 192, 2018, pp. 372-378.
Li Y, Li L, Chen ZX, et al. Carbonate-activated hydrogen peroxide oxidation process for azo dye decolorization: Process, kinetics, and mechanisms. Chemosphere. 2018;192:372-378.
Li, Y., Li, L., Chen, Z. X., Zhang, J., Gong, L., Wang, Y. X., Zhao, H. Q., & Mu, Y. (2018). Carbonate-activated hydrogen peroxide oxidation process for azo dye decolorization: Process, kinetics, and mechanisms. Chemosphere, 192, 372-378. https://doi.org/10.1016/j.chemosphere.2017.10.126
Li Y, et al. Carbonate-activated Hydrogen Peroxide Oxidation Process for Azo Dye Decolorization: Process, Kinetics, and Mechanisms. Chemosphere. 2018;192:372-378. PubMed PMID: 29121567.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Carbonate-activated hydrogen peroxide oxidation process for azo dye decolorization: Process, kinetics, and mechanisms. AU - Li,Yang, AU - Li,Lei, AU - Chen,Zi-Xi, AU - Zhang,Jie, AU - Gong,Li, AU - Wang,Yi-Xuan, AU - Zhao,Han-Qing, AU - Mu,Yang, Y1 - 2017/11/06/ PY - 2017/05/15/received PY - 2017/10/23/revised PY - 2017/10/24/accepted PY - 2017/11/10/pubmed PY - 2018/2/13/medline PY - 2017/11/10/entrez KW - Azo dye KW - Carbonate KW - Cobalt KW - Decolorization KW - Peroxide SP - 372 EP - 378 JF - Chemosphere JO - Chemosphere VL - 192 N2 - Advanced oxidation processes offer effective solutions in treating wastewater from various industries. This study is the first time to investigate the potential of carbonate-activated hydrogen peroxide (CAP) oxidation process for the removal of organic pollutant from highly alkaline wastewaters. Azo dye acid orange 7 (AO7) was selected as a model pollutant. The influences of various parameters on AO7 decolorization by the CAP oxidation were evaluated. Furthermore, the active species involved in AO7 degradation were explored using scavenger experiments and electron spin resonance analysis. Additionally, AO7 degradation products by the CAP oxidation were identified to elucidate possible transformation pathways. Results showed that the CAP oxidation had better AO7 decolorization performance compared to bicarbonate-activated hydrogen peroxide method. The AO7 decolorization efficiency augmented from 3.70 ± 0.76% to 54.27 ± 2.65% when carbonate concentration was increased from 0 to 50 mM at pH 13.0, and then changed slightly with further increasing carbonate concentration to 70 mM. It increased almost linearly from 5.95 ± 0.32% to 94.03 ± 0.39% as H2O2 concentration was increased from 5 to 50 mM. Moreover, trace amount of Co(II) could facilitate AO7 decolorization by the CAP reaction. Superoxide and carbonate radicals might be the main reactive oxygen species involved in the CAP process. Finally, a possible degradation pathway of AO7 by the CAP oxidation was proposed based on the identified products. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29121567/Carbonate_activated_hydrogen_peroxide_oxidation_process_for_azo_dye_decolorization:_Process_kinetics_and_mechanisms_ DB - PRIME DP - Unbound Medicine ER -