Importance of electrode type and configuration on reaction kinetics in removal of tetracycline antibiotic by electrocoagulation
Main Article Content
Abstract
In this study, the effect of Al-Al, Al-Fe and Fe-Fe electrode configurations was investigated on reaction kinetics in removal of tetracycline antibiotic (TCY) by electrocoagulation. Response surface optimized reaction conditions were operated at 800 mg/L tetracycline concentration, 8 mA/cm2 current density, 6 g/L NaCl electrolyte and 40°C reaction temperature at 60 min reaction time. The reaction kinetics study was carried out by nonlinear regression of the integral method with 95% confidence level on the basis of tetracycline concentration and COD concentration. The first order reaction rate equation was determined based on tetracycline concentration and reaction rate constants were calculated as 0.3919 min-1, 0.2918 min-1 and 0.2885 min-1 for Al-Al, Al-Fe and Fe-Fe, respectively. The second order reaction rate equation was determined based on COD concentration and reaction rate constants were calculated as 4.6710-4 mg-1Lmin-1, 4.3210-4 mg-1Lmin-1 and 4.2810-4 mg-1Lmin-1 for Al-Al, Al-Fe and Fe-Fe, respectively. The activation energy values based on tetracycline concentration were calculated as 3.020 kJ/mol, 0.866 kJ/mol and 0.805 kJ/mol for Al-Al, Al-Fe and Fe-Fe, respectively. Based on COD concentration, the activation energy values were determined as 9.413 kJ/mol, 10.085 kJ/mol and 9.825 kJ/mol for Al-Al, Al-Fe and Fe-Fe, respectively.
Article Details
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
References
Kümmerer, K. (2009). Antibiotics in the aquatic environment-A review-Part I. Chemosphere, 75, 417-434.
Wise, R. (2002). Antimicrobial resistance: priorities for action. Journal of Antimicrobial Chemotherapy, 49, 585-586.
Homem, V. and Santos, L. (2011). Degradation and removal methods of antibiotics from aqueous matrices-A review. Journal of Environmental Management, 92, 2304-2347.
Khandegar, V. and Saroha, A.K. (2013). Electrocoagulation for the treatment of textile industry effluent-A review. Journal of Environmental Management, 128, 949-963.
Mollah, M.Y.A., Morkovsky, P., Gomes, J.A.G., Kesmez, M., Parga, J. and Cocke, D.L. (2004). Fundamentals, present and future perspectives of electrocoagulation. Journal of Hazardous Materials, B114, 199-210.
Brillas, E. and Martínez-Huitle, C.A. (2015). Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated review. Applied Catalysis B: Environmental, 166-167, 603-643.
Chen, G. (2004). Electrochemical technologies in wastewater treatment, Separation and Purification Technology, 38, 11-41.
Fogler, H.S. (1992). Elements of Chemical Reaction Engineering, Prentice Hall International Editions, USA.
Levenspiel, O. (1999). Chemical Reaction Engineering. John Wiley & Sons, USA.
Körbahti, B.K. and Demirbüken, P. (2017). Electrochemical Oxidation of Resorcinol in Aqueous Medium Using Boron-Doped Diamond Anode: Reaction Kinetics and Process Optimization with Response Surface Methodology. Frontiers in Chemistry, 5, 75.
Körbahti B.K. and Artut, K. (2010). Electrochemical oil/water demulsification and purification of bilge water using Pt/Ir electrodes. Desalination, 258, 219-228.
Samet, Y., Chaabane Elaoud, S., Ammar, S. and Abdelhedi, R. (2006). Electrochemical degradation of 4-chloroguaiacol for wastewater treatment using PbO2 anodes. Journal of Hazardous Materials, B138, 614-619.