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Excellent performance of cobalt-impregnated activated carbon in peroxymonosulfate activation for acid orange 7 oxidation.
Environ Sci Pollut Res Int. 2017 Apr; 24(10):9651-9661.ES

Abstract

Cobalt-impregnated activated carbon (GAC/Co) was used to produce sulfate radical (SO4·-) from peroxymonosulfate (PMS) in aqueous solution (hereafter called PMS activation). We evaluated its effectiveness by examining the degradation of orange acid 7 (AO7). GAC/Co exhibited high activity to activate PMS to degrade AO7. The degradation efficiency of AO7 increased with increasing dosage of GAC/Co or PMS and elevated temperatures. pH 8 was most favorable for the degradation of AO7 by GAC/Co-activated PMS. The radical quenching experiments indicated that the reactions most likely took place both in the bulk solution and on the surface of GAC/Co. We found that SO4·- played a dominant role in AO7 degradation. Sodium chloride (NaCl) which presents in most dye wastewater had a significant impact on AO7 degradation. Low dosages (<0.4 M) of NaCl showed a slight inhibitory effect, whereas high dosages (0.8 M) increased the reaction rate. HOCl was confirmed as the main contributor for accelerating AO7 degradation with high concentration of NaCl. In a continuous-flow reaction with an empty-bed contact time of 1.35 min, AO7 was not detected in the effluent for 0 to 18.72 L of treated influent volume (156 h) and 85% removal efficiency was still observed after 40.32 L of treated volume (336 h). Finally, the azo bond and the naphthalene structure in AO7 were destroyed and the degradation pathway was proposed.

Authors+Show Affiliations

School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215001, People's Republic of China. Brook Byers Institute for Sustainable Systems and the School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215001, People's Republic of China. chenjiabincn@163.com.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215001, People's Republic of China.Brook Byers Institute for Sustainable Systems and the School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.Brook Byers Institute for Sustainable Systems and the School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA. john.crittenden@ce.gatech.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28251528

Citation

Huang, Tianyin, et al. "Excellent Performance of Cobalt-impregnated Activated Carbon in Peroxymonosulfate Activation for Acid Orange 7 Oxidation." Environmental Science and Pollution Research International, vol. 24, no. 10, 2017, pp. 9651-9661.
Huang T, Chen J, Wang Z, et al. Excellent performance of cobalt-impregnated activated carbon in peroxymonosulfate activation for acid orange 7 oxidation. Environ Sci Pollut Res Int. 2017;24(10):9651-9661.
Huang, T., Chen, J., Wang, Z., Guo, X., & Crittenden, J. C. (2017). Excellent performance of cobalt-impregnated activated carbon in peroxymonosulfate activation for acid orange 7 oxidation. Environmental Science and Pollution Research International, 24(10), 9651-9661. https://doi.org/10.1007/s11356-017-8648-7
Huang T, et al. Excellent Performance of Cobalt-impregnated Activated Carbon in Peroxymonosulfate Activation for Acid Orange 7 Oxidation. Environ Sci Pollut Res Int. 2017;24(10):9651-9661. PubMed PMID: 28251528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Excellent performance of cobalt-impregnated activated carbon in peroxymonosulfate activation for acid orange 7 oxidation. AU - Huang,Tianyin, AU - Chen,Jiabin, AU - Wang,Zhongming, AU - Guo,Xin, AU - Crittenden,John C, Y1 - 2017/03/01/ PY - 2016/11/29/received PY - 2017/02/16/accepted PY - 2017/3/3/pubmed PY - 2017/6/6/medline PY - 2017/3/3/entrez KW - Activated carbon KW - Chloride KW - Cobalt KW - Orange acid 7 KW - Peroxymonosulfate SP - 9651 EP - 9661 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 24 IS - 10 N2 - Cobalt-impregnated activated carbon (GAC/Co) was used to produce sulfate radical (SO4·-) from peroxymonosulfate (PMS) in aqueous solution (hereafter called PMS activation). We evaluated its effectiveness by examining the degradation of orange acid 7 (AO7). GAC/Co exhibited high activity to activate PMS to degrade AO7. The degradation efficiency of AO7 increased with increasing dosage of GAC/Co or PMS and elevated temperatures. pH 8 was most favorable for the degradation of AO7 by GAC/Co-activated PMS. The radical quenching experiments indicated that the reactions most likely took place both in the bulk solution and on the surface of GAC/Co. We found that SO4·- played a dominant role in AO7 degradation. Sodium chloride (NaCl) which presents in most dye wastewater had a significant impact on AO7 degradation. Low dosages (<0.4 M) of NaCl showed a slight inhibitory effect, whereas high dosages (0.8 M) increased the reaction rate. HOCl was confirmed as the main contributor for accelerating AO7 degradation with high concentration of NaCl. In a continuous-flow reaction with an empty-bed contact time of 1.35 min, AO7 was not detected in the effluent for 0 to 18.72 L of treated influent volume (156 h) and 85% removal efficiency was still observed after 40.32 L of treated volume (336 h). Finally, the azo bond and the naphthalene structure in AO7 were destroyed and the degradation pathway was proposed. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/28251528/Excellent_performance_of_cobalt_impregnated_activated_carbon_in_peroxymonosulfate_activation_for_acid_orange_7_oxidation_ L2 - https://dx.doi.org/10.1007/s11356-017-8648-7 DB - PRIME DP - Unbound Medicine ER -