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A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO2-Ta2O5 anodes in high-gravity fields.
Water Sci Technol. 2017 Jul; 76(3-4):662-670.WS

Abstract

In the electro-catalytic degradation process of phenol wastewater, bubbles and mass transfer limitation will result in the decrease in wastewater degradation efficiency, a long electrolysis time and a high energy consumption. Self-made Ti/IrO2-Ta2O5 anodes and a high-gravity electro-catalytic reactor were used to improve them. The Ti/IrO2-Ta2O5 anode was prepared with a thermal decomposition method and characterized by scanning electron microscopy (SEM). Under optimum conditions, the removal efficiencies of phenol, total organic carbon (TOC) and chemical oxygen demand (COD) respectively reached 94.77%, 50.96% and 41.2% after 2 h electrolysis in the high-gravity field, which were respectively 10.93%, 16.72% and 24.84% higher than those in the normal gravity field. For about the same removal efficiencies, the electrolysis time and energy consumed in the high-gravity field were 33.3% and 15.4% lower than those consumed in the normal gravity field, respectively. The degradation pathway of phenol detected by high performance liquid chromatography (HPLC) was unchanged in the high-gravity field, but the degradation rate of phenol increased. The Ti/IrO2-Ta2O5 anode provided good stability because the removal efficiencies of phenol and TOC decreased slightly and the surface morphology of the coating was almost unchanged when it had been used in electrolysis for 11 months, about 1,200 h, in the high-gravity field. Results indicated that the phenol wastewater degradation efficiency was improved, the time was shortened, and the energy consumption was reduced in the high-gravity field.

Authors+Show Affiliations

Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan 030051, Shanxi Province, China E-mail: zbgaojing@163.com.Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan 030051, Shanxi Province, China E-mail: zbgaojing@163.com.Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan 030051, Shanxi Province, China E-mail: zbgaojing@163.com.School of Chemical and Environmental Engineering, North University of China, Taiyuan 030051, Shanxi Province, China.School of Chemical and Environmental Engineering, North University of China, Taiyuan 030051, Shanxi Province, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28759448

Citation

Gao, Jing, et al. "A Novel Electro-catalytic Degradation Method of Phenol Wastewater With Ti/IrO2-Ta2O5 Anodes in High-gravity Fields." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 76, no. 3-4, 2017, pp. 662-670.
Gao J, Yan J, Liu Y, et al. A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO2-Ta2O5 anodes in high-gravity fields. Water Sci Technol. 2017;76(3-4):662-670.
Gao, J., Yan, J., Liu, Y., Zhang, J., & Guo, Z. (2017). A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO2-Ta2O5 anodes in high-gravity fields. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 76(3-4), 662-670. https://doi.org/10.2166/wst.2017.262
Gao J, et al. A Novel Electro-catalytic Degradation Method of Phenol Wastewater With Ti/IrO2-Ta2O5 Anodes in High-gravity Fields. Water Sci Technol. 2017;76(3-4):662-670. PubMed PMID: 28759448.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO2-Ta2O5 anodes in high-gravity fields. AU - Gao,Jing, AU - Yan,Junjuan, AU - Liu,Youzhi, AU - Zhang,Jiacheng, AU - Guo,Zhiyuan, PY - 2017/8/1/entrez PY - 2017/8/2/pubmed PY - 2017/10/14/medline SP - 662 EP - 670 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci. Technol. VL - 76 IS - 3-4 N2 - In the electro-catalytic degradation process of phenol wastewater, bubbles and mass transfer limitation will result in the decrease in wastewater degradation efficiency, a long electrolysis time and a high energy consumption. Self-made Ti/IrO2-Ta2O5 anodes and a high-gravity electro-catalytic reactor were used to improve them. The Ti/IrO2-Ta2O5 anode was prepared with a thermal decomposition method and characterized by scanning electron microscopy (SEM). Under optimum conditions, the removal efficiencies of phenol, total organic carbon (TOC) and chemical oxygen demand (COD) respectively reached 94.77%, 50.96% and 41.2% after 2 h electrolysis in the high-gravity field, which were respectively 10.93%, 16.72% and 24.84% higher than those in the normal gravity field. For about the same removal efficiencies, the electrolysis time and energy consumed in the high-gravity field were 33.3% and 15.4% lower than those consumed in the normal gravity field, respectively. The degradation pathway of phenol detected by high performance liquid chromatography (HPLC) was unchanged in the high-gravity field, but the degradation rate of phenol increased. The Ti/IrO2-Ta2O5 anode provided good stability because the removal efficiencies of phenol and TOC decreased slightly and the surface morphology of the coating was almost unchanged when it had been used in electrolysis for 11 months, about 1,200 h, in the high-gravity field. Results indicated that the phenol wastewater degradation efficiency was improved, the time was shortened, and the energy consumption was reduced in the high-gravity field. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/28759448/A_novel_electro_catalytic_degradation_method_of_phenol_wastewater_with_Ti/IrO2_Ta2O5_anodes_in_high_gravity_fields_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2017.262 DB - PRIME DP - Unbound Medicine ER -