title: Electro-Fenton oxidation of coking wastewater: optimization using the combination of central composite design and convex optimization method.
abstract: The electro-Fenton treatment of coking wastewater was evaluated experimentally in a batch electrochemical reactor. Based on central composite design coupled with response surface methodology, a regression quadratic equation was developed to model the total organic carbon (TOC) removal efficiency. This model was further proved to accurately predict the optimization of process variables by means of analysis of variance. With the aid of the convex optimization method, which is a global optimization method, the optimal parameters were determined as current density of 30.9 mA/cm2, Fe2+concentration of 0.35 mg/L, and pH of 4.05. Under the optimized conditions, the corresponding TOC removal efficiency was up to 73.8%. The maximum TOC removal efficiency achieved can be further confirmed by the results of gas chromatography-mass spectrum analysis.
authors.affiliation: a Department of Chemical Engineering , Anhui Vocational and Technical College , Hefei City , Anhui Province , People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.affiliation: b Kaifeng Hospital of TCM , Kaifeng City , Henan Province , People's Republic of China.
authors.forename: Jiwei
authors.initials: J
authors.lastname: Sun
authors.affiliation: c State Key Laboratory of Environmental Aquatic Chemistry , Research Center for Eco-Environmental Sciences, Chinese Academy of Science , Beijing , People's Republic of China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.affiliation: c State Key Laboratory of Environmental Aquatic Chemistry , Research Center for Eco-Environmental Sciences, Chinese Academy of Science , Beijing , People's Republic of China.
authors.forename: Niansi
authors.initials: N
authors.lastname: Fan
authors.affiliation: d Department of Civil and Environmental Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi , Japan.
authors.forename: Jialing
authors.initials: J
authors.lastname: Ni
authors.affiliation: c State Key Laboratory of Environmental Aquatic Chemistry , Research Center for Eco-Environmental Sciences, Chinese Academy of Science , Beijing , People's Republic of China.|d Department of Civil and Environmental Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi , Japan.|e Beijing Hui Pu Yao Light Energy Environmental Protection Technology Co, Ltd , Beijing , People's Republic of China.
authors.forename: Weicheng
authors.initials: W
authors.lastname: Li
authors.affiliation: c State Key Laboratory of Environmental Aquatic Chemistry , Research Center for Eco-Environmental Sciences, Chinese Academy of Science , Beijing , People's Republic of China.
authors.forename: Yingxin
authors.initials: Y
authors.lastname: Gao
authors.affiliation: d Department of Civil and Environmental Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi , Japan.
authors.forename: Yu-You
authors.initials: YY
authors.lastname: Li
authors.affiliation: e Beijing Hui Pu Yao Light Energy Environmental Protection Technology Co, Ltd , Beijing , People's Republic of China.
authors.forename: Changyou
authors.initials: C
authors.lastname: Xu
mesh_terms: D003077:Coke; D006861:Hydrogen Peroxide; D007501:Iron; D010084:Oxidation-Reduction; D062065:Wastewater
chemical_list: D003077:Coke; D006861:Hydrogen Peroxide; D007501:Iron; D062065:Wastewater
keywords: Electro-Fenton; central composite design; coking wastewater; convex optimization method; optimization