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Activated carbon catalyzed persulfate oxidation of Azo dye acid orange 7 at ambient temperature.
J Hazard Mater. 2011 Feb 15; 186(1):659-66.JH

Abstract

Persulfate (PS) oxidative degradation of azo dye acid orange 7 (AO7) in an aqueous solution was studied in the presence of suspended granular activated carbon (GAC) at ambient temperature (e.g., 25°C). It was observed that there existed a remarkable synergistic effect in the GAC/PS combined system. Higher PS concentration and GAC dosage resulted in higher AO7 degrading rates. Near-neutral was the optimal initial pH. Adsorption had an adverse effect on AO7 degradation. AO7 had not only a good decolorization, but a good mineralization. The decomposition of PS followed a first-order kinetics behavior both in the presence and in the absence of AO7. Radical mechanism was studied and three radical scavengers (methanol (MA), tert-butanol (TBA), phenol) were used to determine the kind of major active species taking part in the degradation of AO7 and the location of degradation reaction. It was assumed that the degradation of AO7 did not occur in the liquid phase, but in the porous bulk and boundary layer on the external surface of GAC. SO(4)(-•) or HO•, generated on or near the surface of GAC, played a major role in the AO7 degradation. Finally, the recovery performance of GAC was studied through the GAC reuse experiments.

Authors+Show Affiliations

Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China. shiningpup@hotmail.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21145652

Citation

Yang, Shiying, et al. "Activated Carbon Catalyzed Persulfate Oxidation of Azo Dye Acid Orange 7 at Ambient Temperature." Journal of Hazardous Materials, vol. 186, no. 1, 2011, pp. 659-66.
Yang S, Yang X, Shao X, et al. Activated carbon catalyzed persulfate oxidation of Azo dye acid orange 7 at ambient temperature. J Hazard Mater. 2011;186(1):659-66.
Yang, S., Yang, X., Shao, X., Niu, R., & Wang, L. (2011). Activated carbon catalyzed persulfate oxidation of Azo dye acid orange 7 at ambient temperature. Journal of Hazardous Materials, 186(1), 659-66. https://doi.org/10.1016/j.jhazmat.2010.11.057
Yang S, et al. Activated Carbon Catalyzed Persulfate Oxidation of Azo Dye Acid Orange 7 at Ambient Temperature. J Hazard Mater. 2011 Feb 15;186(1):659-66. PubMed PMID: 21145652.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activated carbon catalyzed persulfate oxidation of Azo dye acid orange 7 at ambient temperature. AU - Yang,Shiying, AU - Yang,Xin, AU - Shao,Xueting, AU - Niu,Rui, AU - Wang,Leilei, Y1 - 2010/11/20/ PY - 2010/09/03/received PY - 2010/11/12/revised PY - 2010/11/12/accepted PY - 2010/12/15/entrez PY - 2010/12/15/pubmed PY - 2011/6/3/medline SP - 659 EP - 66 JF - Journal of hazardous materials JO - J Hazard Mater VL - 186 IS - 1 N2 - Persulfate (PS) oxidative degradation of azo dye acid orange 7 (AO7) in an aqueous solution was studied in the presence of suspended granular activated carbon (GAC) at ambient temperature (e.g., 25°C). It was observed that there existed a remarkable synergistic effect in the GAC/PS combined system. Higher PS concentration and GAC dosage resulted in higher AO7 degrading rates. Near-neutral was the optimal initial pH. Adsorption had an adverse effect on AO7 degradation. AO7 had not only a good decolorization, but a good mineralization. The decomposition of PS followed a first-order kinetics behavior both in the presence and in the absence of AO7. Radical mechanism was studied and three radical scavengers (methanol (MA), tert-butanol (TBA), phenol) were used to determine the kind of major active species taking part in the degradation of AO7 and the location of degradation reaction. It was assumed that the degradation of AO7 did not occur in the liquid phase, but in the porous bulk and boundary layer on the external surface of GAC. SO(4)(-•) or HO•, generated on or near the surface of GAC, played a major role in the AO7 degradation. Finally, the recovery performance of GAC was studied through the GAC reuse experiments. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/21145652/Activated_carbon_catalyzed_persulfate_oxidation_of_Azo_dye_acid_orange_7_at_ambient_temperature_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(10)01483-4 DB - PRIME DP - Unbound Medicine ER -