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Electrochemical treatments of coking wastewater and coal gasification wastewater with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes.
J Environ Manage. 2020 Jul 01; 265:110571.JE

Abstract

Electrochemical treatments of coking wastewater (CW) and coal gasification wastewater (CGW) were conducted with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. The performances of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes were investigated by analyzing the effects of five key influencing factors including anodes material, current density, anode-cathode distance, initial pH value, and electrolyte type. The removal efficiencies of total organic carbon (TOC) were analyzed during the processes of CW and CGW electro-oxidation. The removal efficiencies of sixteen polynuclear aromatic hydrocarbons (PAHs) in CW and CGW by electro-oxidation were also explored to further assess the electrochemical activities of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. The Ti/Ti4O7 anode achieved 78.7% COD removal efficiency of CW, 85.8% COD removal efficiency of CGW, 50.3% TOC removal efficiency of CW, and 54.8% TOC removal efficiency of CGW, higher than the Ti/RuO2-IrO2 anode (76.7%, 78.1%, 44.8% and 46.8%). The COD removal efficiencies increased with the applied current density, decreased with the increase of the anode-cathode distance, and slightly decreased with the increase of the initial pH value. Meanwhile, the removal efficiencies of sixteen PAHs by the Ti/Ti4O7 anode were mostly higher than those by the Ti/RuO2-IrO2 anode. By comprehensively analyzing the performances of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes on electrochemical treatments of CW and CGW, this study may supply insights into the application potentials of these anodes to the electrochemical treatments of real wastewater.

Authors+Show Affiliations

College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China.College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China.School of Chemical and Environmental Engineering, Beijing Campus, China University of Mining and Technology, Beijing, 100083, PR China.College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China. Electronic address: luolinwei0@163.com.College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China.College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, PR China. Electronic address: zhouyy@hunau.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32421562

Citation

Zhi, Dan, et al. "Electrochemical Treatments of Coking Wastewater and Coal Gasification Wastewater With Ti/Ti4O7 and Ti/RuO2-IrO2 Anodes." Journal of Environmental Management, vol. 265, 2020, p. 110571.
Zhi D, Zhang J, Wang J, et al. Electrochemical treatments of coking wastewater and coal gasification wastewater with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. J Environ Manage. 2020;265:110571.
Zhi, D., Zhang, J., Wang, J., Luo, L., Zhou, Y., & Zhou, Y. (2020). Electrochemical treatments of coking wastewater and coal gasification wastewater with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. Journal of Environmental Management, 265, 110571. https://doi.org/10.1016/j.jenvman.2020.110571
Zhi D, et al. Electrochemical Treatments of Coking Wastewater and Coal Gasification Wastewater With Ti/Ti4O7 and Ti/RuO2-IrO2 Anodes. J Environ Manage. 2020 Jul 1;265:110571. PubMed PMID: 32421562.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical treatments of coking wastewater and coal gasification wastewater with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. AU - Zhi,Dan, AU - Zhang,Jia, AU - Wang,Jianbing, AU - Luo,Lin, AU - Zhou,Yuzhou, AU - Zhou,Yaoyu, Y1 - 2020/04/13/ PY - 2019/12/03/received PY - 2020/03/02/revised PY - 2020/04/04/accepted PY - 2020/5/19/entrez PY - 2020/5/19/pubmed PY - 2020/5/21/medline KW - Electrochemical oxidation KW - Polynuclear aromatic hydrocarbons removal KW - Real wastewater treatment KW - The Ti/RuO(2)–IrO(2) anode KW - The Ti/Ti(4)O(7) anode SP - 110571 EP - 110571 JF - Journal of environmental management JO - J. Environ. Manage. VL - 265 N2 - Electrochemical treatments of coking wastewater (CW) and coal gasification wastewater (CGW) were conducted with Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. The performances of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes were investigated by analyzing the effects of five key influencing factors including anodes material, current density, anode-cathode distance, initial pH value, and electrolyte type. The removal efficiencies of total organic carbon (TOC) were analyzed during the processes of CW and CGW electro-oxidation. The removal efficiencies of sixteen polynuclear aromatic hydrocarbons (PAHs) in CW and CGW by electro-oxidation were also explored to further assess the electrochemical activities of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes. The Ti/Ti4O7 anode achieved 78.7% COD removal efficiency of CW, 85.8% COD removal efficiency of CGW, 50.3% TOC removal efficiency of CW, and 54.8% TOC removal efficiency of CGW, higher than the Ti/RuO2-IrO2 anode (76.7%, 78.1%, 44.8% and 46.8%). The COD removal efficiencies increased with the applied current density, decreased with the increase of the anode-cathode distance, and slightly decreased with the increase of the initial pH value. Meanwhile, the removal efficiencies of sixteen PAHs by the Ti/Ti4O7 anode were mostly higher than those by the Ti/RuO2-IrO2 anode. By comprehensively analyzing the performances of Ti/Ti4O7 and Ti/RuO2-IrO2 anodes on electrochemical treatments of CW and CGW, this study may supply insights into the application potentials of these anodes to the electrochemical treatments of real wastewater. SN - 1095-8630 UR - https://www.unboundmedicine.com/medline/citation/32421562/Electrochemical_treatments_of_coking_wastewater_and_coal_gasification_wastewater_with_Ti/Ti4O7_and_Ti/RuO2_IrO2_anodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0301-4797(20)30504-1 DB - PRIME DP - Unbound Medicine ER -