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Degradation of Acid Orange 7 using peroxymonosulfate catalyzed by granulated activated carbon and enhanced by electrolysis.
Chemosphere. 2017 Dec; 188:139-147.C

Abstract

Electrochemistry coupled with granulated activated carbon catalysis of peroxymonosulfate (electro/GAC/PMS) as a novel wastewater treatment process was performed for the degradation of Acid Orange 7 (AO7) in aqueous solution. The decolorization of AO7 was compared under different permutations and combinations of electro-oxidation, GAC and PMS. It showed that the electro/GAC/PMS process was the most effective and the decolorization of AO7 followed pseudo-first order kinetics. The surface chemistry of GAC samples was analyzed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Compared with the fresh samples, π-electron density and hydroxyl group content decreased under the GAC/PMS system, but kept the similar values under the electro/GAC/PMS system. Electron paramagnetic resonance and radical scavenger studies were used to verify the formation of sulfate radicals (SO4-) and hydroxyl radicals (OH). The optimized conditions were found to be: current density 8 mA cm-2; PMS concentration 5 mM; GAC dosage 0.5 g L-1; and initial pH value 5.0. GAC recycling experiments over 4 runs showed some decrease in reactivity. Overall, the results indicate that 100% color removal was readily achieved and 50.4% of TOC was removed which shows high efficiency of the electro/GAC/PMS process.

Authors+Show Affiliations

Department of Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China.Department of Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China.Department of Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China.Department of Environmental Engineering, Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China. Electronic address: eeng@whu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28881241

Citation

Li, Jing, et al. "Degradation of Acid Orange 7 Using Peroxymonosulfate Catalyzed By Granulated Activated Carbon and Enhanced By Electrolysis." Chemosphere, vol. 188, 2017, pp. 139-147.
Li J, Lin H, Zhu K, et al. Degradation of Acid Orange 7 using peroxymonosulfate catalyzed by granulated activated carbon and enhanced by electrolysis. Chemosphere. 2017;188:139-147.
Li, J., Lin, H., Zhu, K., & Zhang, H. (2017). Degradation of Acid Orange 7 using peroxymonosulfate catalyzed by granulated activated carbon and enhanced by electrolysis. Chemosphere, 188, 139-147. https://doi.org/10.1016/j.chemosphere.2017.08.137
Li J, et al. Degradation of Acid Orange 7 Using Peroxymonosulfate Catalyzed By Granulated Activated Carbon and Enhanced By Electrolysis. Chemosphere. 2017;188:139-147. PubMed PMID: 28881241.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of Acid Orange 7 using peroxymonosulfate catalyzed by granulated activated carbon and enhanced by electrolysis. AU - Li,Jing, AU - Lin,Heng, AU - Zhu,Kangmeng, AU - Zhang,Hui, Y1 - 2017/08/28/ PY - 2017/03/15/received PY - 2017/08/25/revised PY - 2017/08/26/accepted PY - 2017/9/8/pubmed PY - 2018/1/5/medline PY - 2017/9/8/entrez KW - Acid Orange 7 KW - Electrochemical KW - Granulated activated carbon KW - Peroxymonosulfate KW - Reactive radical SP - 139 EP - 147 JF - Chemosphere JO - Chemosphere VL - 188 N2 - Electrochemistry coupled with granulated activated carbon catalysis of peroxymonosulfate (electro/GAC/PMS) as a novel wastewater treatment process was performed for the degradation of Acid Orange 7 (AO7) in aqueous solution. The decolorization of AO7 was compared under different permutations and combinations of electro-oxidation, GAC and PMS. It showed that the electro/GAC/PMS process was the most effective and the decolorization of AO7 followed pseudo-first order kinetics. The surface chemistry of GAC samples was analyzed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Compared with the fresh samples, π-electron density and hydroxyl group content decreased under the GAC/PMS system, but kept the similar values under the electro/GAC/PMS system. Electron paramagnetic resonance and radical scavenger studies were used to verify the formation of sulfate radicals (SO4-) and hydroxyl radicals (OH). The optimized conditions were found to be: current density 8 mA cm-2; PMS concentration 5 mM; GAC dosage 0.5 g L-1; and initial pH value 5.0. GAC recycling experiments over 4 runs showed some decrease in reactivity. Overall, the results indicate that 100% color removal was readily achieved and 50.4% of TOC was removed which shows high efficiency of the electro/GAC/PMS process. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28881241/Degradation_of_Acid_Orange_7_using_peroxymonosulfate_catalyzed_by_granulated_activated_carbon_and_enhanced_by_electrolysis_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(17)31376-0 DB - PRIME DP - Unbound Medicine ER -