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● Two different configuration reactors were carried to Ni-EDTA degradation.
● Degradation and energy efficiency were improved by changing configuration.
● Mixing and mass-transport of reactors were analyzed by experimental tests.
● Flow velocity and potential distribution of reactors were obtained by CFD.
Electrochemical decomplexation is a common technique that is widely used in industrial wastewater treatment. Although much research has been conducted to improve the decomplexation efficiency of metal–organic complexes [e.g., Ni-ethylenediaminetetraacetic acid (EDTA)], the effects of the fundamental electrochemical reactor configurations in this technology are often underestimated. This research provides insights into the role of the reactor configuration in electrochemical decomplexation of Ni-EDTA through experiments and simulations. Degradation experiments were conducted at the same current density and flow rate in flow-by (FB) and flow-through (FT) electrochemical reactor configurations. The results show that the FT reactor gives a better removal rate (FB: 35%, FT: 46%) and that its energy consumption is half that of the FB reactor [approximately 207.78 (kW·h)/(kg Ni) less]. Experiments show that the stagnant and back-mixing zones for the FT configuration (Dz = 0.062) are smaller than those for the FB configuration (Dz = 0.205). This promotes mass transport in the reaction environment and decreases problems with the reactor performance. Computational fluid dynamics simulations showed that the velocity and potential distributions were both more even for the FT than for the FB configuration. This increases uniformity of mass transport and the current density distribution, produces less ohmic resistance, and greatly improves energy saving. These experimental and simulation results will enable Ni-EDTA electrochemical decomplexation to be achieved with low energy consumption and high efficiency by using appropriate reactor configurations.
Q. Wang, J. Yu, X. Chen, D. Du, R. Wu, G. Qu, X. Guo, H. Jia, T. Wang, Non-thermal plasma oxidation of Cu(Ⅱ)-EDTA and simultaneous Cu(Ⅱ) elimination by chemical precipitation, J. Environ. Manag. 248 (2019), 109237.
J. Li, J. Ma, R. Dai, X. Wang, M. Chen, T.D. Waite, Z. Wang, Self-enhanced de complexation of Cu-organic complexes and Cu recovery from wastewaters using an electrochemical membrane filtration system, Environ. Sci. Technol. 55 (2021) 655–664.
Z. Zhao, W. Dong, H. Wang, G. Chen, J. Tang, Y. Wu, Simultaneous decomplexation in blended Cu(Ⅱ)/Ni(Ⅱ)-EDTA systems by electro-Fenton process using iron sacrificing electrodes, J. Hazard Mater. 350 (2018) 128–135.
F. Zhang, W. Wang, L. Xu, C. Zhou, Y. Sun, J. Niu, Treatment of Ni-EDTA containing wastewater by electrochemical degradation using Ti3+ self-doped TiO2 nanotube arrays anode, Chemosphere 278 (2021), 130465.
C. Liu, Y. Min, A.Y. Zhang, Y. Si, J.J. Chen, H.Q. Yu, Electrochemical treatment of phenol-containing wastewater by facet-tailored TiO2: efficiency, characteristics and mechanisms, Water Res. 165 (2019), 114980.
S.C. Perry, C.P. de León, F.C. Walsh, Review—the design, performance and continuing development of electrochemical reactors for clean electrosynthesis, J. Electrochem. Soc. 167 (2020), 155525.
Y. Sato, Q. Zeng, L. Meng, G. Chen, Importance of combined electrochemical process sequence and electrode arrangements: a lab-scale trial of real reverse osmosis landfill leachate concentrate, Water Res. 192 (2021), 116849.
L. Dong, S.T. Johansen, T.A. Engh, Flow induced by an impeller in an unbaffled tank—Ⅱ. Numerical modelling, Chem. Eng. Sci. 49 (1994) 3511–3518.
R. Farmer, R. Pike, G. Cheng, CFD analyses of complex flows, Comput. Chem. Eng. 29 (2005) 2386–2403.
J. Wilk, A review of measurements of the mass transfer in minichannels using the limiting current technique, Exp. Therm. Fluid Sci. 57 (2014) 242–249.
Y. He, P. Zhang, H. Huang, X. Wang, B. Chen, Z. Guo, H. Lin, Electrochemical degradation of herbicide diuron on flow-through electrochemical reactor and CFD hydrodynamics simulation, Separ. Purif. Technol. 251 (2020), 117284.
D.V. Kalaga, R.K. Reddy, J.B. Joshi, S.V. Dalvi, K. Nandkumar, Liquid phase axial mixing in solid-liquid circulating multistage fluidized bed: CFD modeling and RTD measurements, Chem. Eng. J. 191 (2012) 475–490.
O. Levenspiel, Chemical Reaction Engineering, third ed., John Wiley & Sons, New York, 1999.
Ö. Aydin, S. Yapici, A novel method for the measurement of mixing Time: a new application of electrochemical limiting diffusion current technique, Exp. Therm. Fluid Sci. 99 (2018) 242–250.
J. Zhang, A. Li, Study on particle deposition in vertical square ventilation duct flows by different models, Energy Convers. Manag. 49 (2008) 1008–1018.
T.H. Shih, W.W. Liou, A. Shabbir, Z. Yang, J. Zhu, A new k–ε eddy viscosity model for high Reynolds number turbulent flows, Comput. Fluids 24 (1995) 227–238.
E.R. Henquín, A.N. Colli, M.E.H. Bergmann, J.M. Bisang, Characterization of a bipolar parallel-plate electrochemical reactor for water disinfection using low conductivity drinking water, Chem. Eng. Process. Process. Intensif. 65 (2013) 45–52.
X. Hu, S. Yang, X. You, W. Zhang, Y. Liu, W. Liang, Electrocatalytic decomplexation of Cu-EDTA and simultaneous recovery of Cu with Ni/GO-PAC particle electrode, Chem. Eng. J. 428 (2022), 131468.
J. Li, J. Yan, G. Yao, Y. Zhang, X. Li, B. Lai, Improving the degradation of atrazine in the three-dimensional (3D) electrochemical process using CuFe2O4 as both particle electrode and catalyst for persulfate activation, Chem. Eng. J. 361 (2019) 1317–1332.
L. Huang, D. Li, J. Liu, L. Yang, C. Dai, N. Ren, Y. Feng, CFD simulation of mass transfer in electrochemical reactor with mesh cathode for higher phenol degradation, Chemosphere 262 (2021), 127626.
X. Zhao, L. Guo, C. Hu, H. Liu, J. Qu, Simultaneous destruction of Nickel (Ⅱ)-EDTA with TiO2/Ti film anode and electrodeposition of nickel ions on the cathode, Appl. Catal. B Environ. 144 (2014) 478–485.
D.V. Kalaga, R.K. Reddy, J.B. Joshi, S.V. Dalvi, K. Nandkumar, Liquid phase axial mixing in solid-liquid circulating multistage fluidized bed: CFD modeling and RTD measurements, Chem. Eng. J. 191 (2012) 475–490.
R. Fazli-Abukheyli, P. Darvishi, Combination of axial dispersion and velocity profile in parallel tanks-in-series compartment model for prediction of residence Time distribution in a wide range of non-ideal laminar flow regimes, Chem. Eng. Sci. 195 (2019) 531–540.
J.T. Adeosun, A. Lawal, Numerical and experimental studies of mixing characteristics in a T-junction microchannel using residence-Time distribution, Chem. Eng. Sci. 64 (2009) 2422–2432.
F.T. Ndoye, N. Erabit, G. Alvarez, D. Flick, Influence of whey protein aggregation on the residence time distribution in a tubular heat exchanger and a helical holding tube during heat treatment process, J. Food Eng. 112 (2012) 158–167.
E. Georget, J.L. Sauvageat, A. Burbidge, A. Mathys, Residence time distributions in a modular micro reaction system, J. Food Eng. 116 (2013) 910–919.
H. Scott Fogler, Elements of chemical reaction engineering, Chem. Eng. Sci. 42 (1987) 2493.
R. Xie, X. Meng, P. Sun, J. Niu, W. Jiang, L. Bottomley, D. Li, Y. Chen, J. Crittenden, Electrochemical oxidation of ofloxacin using a TiO2-based SnO2-Sb/polytetrafluoroethylene resin-PbO2 electrode: reaction kinetics and mass transfer impact, Appl. Catal. B Environ. 203 (2017) 515–525.
T. Mizushina, F. Ogino, Y. Oka, H. Fukuda, Turbulent heat and mass transfer between wall and fluid streams of large Prandtl and Schmidt numbers, Int. J. Heat Mass Tran. 14 (1971) 1705–1716.
J. Wang, T. Li, M. Zhou, X. Li, J. Yu, Characterization of hydrodynamics and mass transfer in two types of tubular electrochemical reactors, Electrochim. Acta 173 (2015) 698–704.
A. Rodríguez, F.F. Rivera, G. Orozco, G. Carreño, F. Castañeda, Analysis of inlet and gap effect in hydrodynamics and mass transport performance of a multipurpose electrochemical reactor: CFD simulation and experimental validation, Electrochim. Acta 282 (2018) 520–532.
S.T. McBeath, A. Nouri-Khorasani, M. Mohseni, D.P. Wilkinson, In-situ determination of current density distribution and fluid modeling of an electrocoagulation process and its effects on natural organic matter removal for drinking water treatment, Water Res. 171 (2020), 115404.
M. Rosales, J.L. Nava, Simulations of turbulent flow, mass transport, and tertiary current distribution on the cathode of a rotating cylinder electrode reactor in continuous operation mode during silver deposition, J. Electrochem. Soc. 164 (2017) E3345–E3353.
A. Vázquez, I. Rodríguez, I. Lázaro, Primary potential and current density distribution analysis: a first approach for designing electrocoagulation reactors, Chem. Eng. J. 179 (2012) 253–261.
J.T. López-Maldonado, F.F. Rivera, F. Castañeda-Zaldívar, Numerical and experimental evaluation of the general performance in a modular electrochemical reactor and its feasibility for electro-chlorination purposes: effect of the different electrode assembly configurations, Chem. Eng. Res. Des. 177 (2022) 45–55.
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