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Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a Co-NiOx catalyst.
Water Sci Technol. 2017 Sep; 76(5-6):1436-1446.WS

Abstract

Sulfate radical-based advanced oxidation processes have had considerable attention due to the highly oxidizing function of sulfate radicals (SO4-·) resulting in acceleration of organic pollutants degradation in aqueous environments. A Co-Ni mixed oxide nanocatalyst, which was prepared by the sol-gel method, was employed to activate peroxymonosulfate (PMS, HSO5-) to produce SO4-· with Acid Orange 7 (AO7) selected as a radical probe. The catalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The characterization results indicated that the ingredient of the catalyst had been changed and the amount of surface hydroxyl increased significantly with the addition of Ni. Therefore, it proved that Co-NiOx catalyst was more effective than CoOx to activate PMS. Moreover, ultrasound (US) can increase the degradation rate of AO7 and US/Co-NiOx/PMS system. This study also focused on some synthesis parameters and the system reached the maximum efficiency under the condition when [PMS] = 0.4 mM, [catalyst] = 0.28 g/L, Pus = 200 W. The AO7 removal in these systems follows first order kinetics. Last but not least, quenching studies was conducted which indicated that the amount of hydroxyl radicals (·OH) increases with the increase of initial pH and SO4-· was the primary reactive oxidant for AO7 degradation.

Authors+Show Affiliations

College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture and Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28953470

Citation

Wei, Chenmo, et al. "Ultrasound Enhanced Heterogeneous Activation of Peroxymonosulfate By a Co-NiOx Catalyst." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 76, no. 5-6, 2017, pp. 1436-1446.
Wei C, Zhang J, Zhang Y, et al. Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a Co-NiOx catalyst. Water Sci Technol. 2017;76(5-6):1436-1446.
Wei, C., Zhang, J., Zhang, Y., Zhang, G., Zhou, P., Li, W., Liang, J., Liu, Y., & Zhang, W. (2017). Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a Co-NiOx catalyst. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 76(5-6), 1436-1446. https://doi.org/10.2166/wst.2017.316
Wei C, et al. Ultrasound Enhanced Heterogeneous Activation of Peroxymonosulfate By a Co-NiOx Catalyst. Water Sci Technol. 2017;76(5-6):1436-1446. PubMed PMID: 28953470.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a Co-NiOx catalyst. AU - Wei,Chenmo, AU - Zhang,Jing, AU - Zhang,Yongli, AU - Zhang,Gucheng, AU - Zhou,Peng, AU - Li,Wenshu, AU - Liang,Juan, AU - Liu,Ya, AU - Zhang,Wei, PY - 2017/9/28/entrez PY - 2017/9/28/pubmed PY - 2018/2/24/medline SP - 1436 EP - 1446 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 76 IS - 5-6 N2 - Sulfate radical-based advanced oxidation processes have had considerable attention due to the highly oxidizing function of sulfate radicals (SO4-·) resulting in acceleration of organic pollutants degradation in aqueous environments. A Co-Ni mixed oxide nanocatalyst, which was prepared by the sol-gel method, was employed to activate peroxymonosulfate (PMS, HSO5-) to produce SO4-· with Acid Orange 7 (AO7) selected as a radical probe. The catalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The characterization results indicated that the ingredient of the catalyst had been changed and the amount of surface hydroxyl increased significantly with the addition of Ni. Therefore, it proved that Co-NiOx catalyst was more effective than CoOx to activate PMS. Moreover, ultrasound (US) can increase the degradation rate of AO7 and US/Co-NiOx/PMS system. This study also focused on some synthesis parameters and the system reached the maximum efficiency under the condition when [PMS] = 0.4 mM, [catalyst] = 0.28 g/L, Pus = 200 W. The AO7 removal in these systems follows first order kinetics. Last but not least, quenching studies was conducted which indicated that the amount of hydroxyl radicals (·OH) increases with the increase of initial pH and SO4-· was the primary reactive oxidant for AO7 degradation. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/28953470/Ultrasound_enhanced_heterogeneous_activation_of_peroxymonosulfate_by_a_Co_NiOx_catalyst_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2017.316 DB - PRIME DP - Unbound Medicine ER -