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Degradation of thiocyanate by electrochemical oxidation process in coke oven wastewater: Role of operative parameters and mechanistic study.
Chemosphere. 2020 Sep; 255:127014.C

Abstract

This study presents the removal of thiocyanate (SCN-) from coke oven wastewater by the electrooxidation (EO) process. Initially, the performances boron-doped diamond (BDD) and different DSA (Dimensionally stable anode) electrodes including Ti/IrO2, Ti/IrO2-RuO2, and Ti/IrO2-RuO2-TiO2 in SCN- removal were compared. BDD anode outperformed the Ti-based mixed metal oxide (MMO) anodes achieving 96.51% SCN- removal efficiency. The most favorable conditions for the removal of SCN- using BDD anode were determined as follows: pH = 9, current density = 43.10 A m-2, and the electrolyte concentration (Na2SO4) = 2.5 g L-1. The strong role of ⦁OH in the removal of SCN- was confirmed by the addition of radical quenching agents. The evolution of the intermediates as a result of the EO of SCN- was determined. Under the determined conditions, the EO process could remove 84.13% of SCN- and 94.67% of phenol from a real coke oven wastewater, which was comparable to that of the simulated solution. The electrical energy consumption cost of the process to remove 1 kg of SCN- was calculated as 0.208 US $. Overall, the study showed the EO using BDD anode is a cost-effective method for the removal of SCN- from a coke oven wastewater.

Authors+Show Affiliations

Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran. Electronic address: akhataee@gtu.edu.tr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32679632

Citation

Turan, Ayşenur, et al. "Degradation of Thiocyanate By Electrochemical Oxidation Process in Coke Oven Wastewater: Role of Operative Parameters and Mechanistic Study." Chemosphere, vol. 255, 2020, p. 127014.
Turan A, Keyikoglu R, Kobya M, et al. Degradation of thiocyanate by electrochemical oxidation process in coke oven wastewater: Role of operative parameters and mechanistic study. Chemosphere. 2020;255:127014.
Turan, A., Keyikoglu, R., Kobya, M., & Khataee, A. (2020). Degradation of thiocyanate by electrochemical oxidation process in coke oven wastewater: Role of operative parameters and mechanistic study. Chemosphere, 255, 127014. https://doi.org/10.1016/j.chemosphere.2020.127014
Turan A, et al. Degradation of Thiocyanate By Electrochemical Oxidation Process in Coke Oven Wastewater: Role of Operative Parameters and Mechanistic Study. Chemosphere. 2020;255:127014. PubMed PMID: 32679632.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of thiocyanate by electrochemical oxidation process in coke oven wastewater: Role of operative parameters and mechanistic study. AU - Turan,Ayşenur, AU - Keyikoglu,Ramazan, AU - Kobya,Mehmet, AU - Khataee,Alireza, Y1 - 2020/05/10/ PY - 2020/03/28/received PY - 2020/05/06/revised PY - 2020/05/07/accepted PY - 2020/7/19/entrez PY - 2020/7/19/pubmed PY - 2020/7/30/medline KW - Boron-doped diamond KW - Coke oven wastewater KW - Electrochemical oxidation KW - Operation cost KW - Thiocyanate removal SP - 127014 EP - 127014 JF - Chemosphere JO - Chemosphere VL - 255 N2 - This study presents the removal of thiocyanate (SCN-) from coke oven wastewater by the electrooxidation (EO) process. Initially, the performances boron-doped diamond (BDD) and different DSA (Dimensionally stable anode) electrodes including Ti/IrO2, Ti/IrO2-RuO2, and Ti/IrO2-RuO2-TiO2 in SCN- removal were compared. BDD anode outperformed the Ti-based mixed metal oxide (MMO) anodes achieving 96.51% SCN- removal efficiency. The most favorable conditions for the removal of SCN- using BDD anode were determined as follows: pH = 9, current density = 43.10 A m-2, and the electrolyte concentration (Na2SO4) = 2.5 g L-1. The strong role of ⦁OH in the removal of SCN- was confirmed by the addition of radical quenching agents. The evolution of the intermediates as a result of the EO of SCN- was determined. Under the determined conditions, the EO process could remove 84.13% of SCN- and 94.67% of phenol from a real coke oven wastewater, which was comparable to that of the simulated solution. The electrical energy consumption cost of the process to remove 1 kg of SCN- was calculated as 0.208 US $. Overall, the study showed the EO using BDD anode is a cost-effective method for the removal of SCN- from a coke oven wastewater. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32679632/Degradation_of_thiocyanate_by_electrochemical_oxidation_process_in_coke_oven_wastewater:_Role_of_operative_parameters_and_mechanistic_study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)31207-8 DB - PRIME DP - Unbound Medicine ER -