Chromium and cadmium removal from synthetic wastewater by Electrocoagulation process
Electrocoagulation (EC) is one of the efficient electrochemical approaches for industrial wastewater treatment. The present work aims to reach optimum conditions for achieving simultaneous removal of chromium and cadmium ions from synthetic wastewater by EC through assessment of different parameters like electrodes material, electrode configuration, initial pH, current density, initial temperature, and initial contaminate concentration. In addition, a comparison between chemical coagulation and EC efficiency for Chromium and cadmium removal was presented. Results showed that the (Fe-Al), an anode and cathode, achieved better removal efficiency than other electrodes configurations (Fe-Fe / Al-Fe / Al- Al). Also, the increase of initial temperature and current density enhanced the removal efficiency. In contrast, the increase in the initial concentration reduced the removal efficiency. The complete removal of Chromium achieved through the use of Fe-Al electrodes and current density was 12.50 mA/cm2 with solution pH of 5.8, temperature was 25oC and an initial concentration of 280 mg/L. On the other hand, Cadmium’s complete removal was achieved through the use of Fe-Allectrodes, at pH of 5.8, applied current 1.4 A and 60oC. Therefore, EC was proved to be better approach than conventional coagulation in case of treatment of wastewater containing different types of heavy metals ions with high initial concentrations.
Al-Qodah Z, Al-Shannag M. Heavy metal ions removal from wastewater using electrocoagulation processes: A comprehensive review. Sep Sci Technol. 2017;52(17):2649–76. https://doi.org/10.1080/01496395.2017.1373677
Gautam RK, Sharma SK, Mahiya S, Chattopadhyaya MC. CHAPTER 1. Contamination of Heavy Metals in Aquatic Media: Transport, Toxicity and Technologies for Remediation. Heavy Met Water. 2014;1–24. DOI: 10.1039/9781782620174-00001
Chen JP, Wang X. Removing copper, zinc, and lead ion by granular activated carbon in pretreated fixed-bed columns. Sep Purif Technol. 2000;19(3):157–67. https://doi.org/10.1016/S1383-5866(99)00069-6
Sapari N, Idris A, Hamid NHA. Total removal of heavy metal from mixed plating rinse wastewater. Desalination. 1996;106(1–3):419–22. https://doi.org/10.1016/S0011-9164(96)00139-7
Heidmann I, Calmano W. Removal of Zn(II), Cu(II), Ni(II), Ag(I) and Cr(VI) present in aqueous solutions by aluminium electrocoagulation. J Hazard Mater. 2008;152(3):934–41. https://doi.org/10.1016/j.jhazmat.2007.07.068
Hanay Ö, Hasar H. Effect of anions on removing Cu2+, Mn2+ and Zn2+ in electrocoagulation process using aluminum electrodes. J Hazard Mater. 2011;189(1–2):572–6. https://doi.org/10.1016/j.jhazmat.2011.02.073
Merzouk B, Gourich B, Sekki A, Madani K, Chibane M. Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique. A case study. J Hazard Mater. 2009;164(1):215–22. https://doi.org/10.1016/j.jhazmat.2008.07.144
Bazrafshan E, Mohammadi L, Ansari-Moghaddam A, Mahvi AH. Heavy metals removal from aqueous environments by electrocoagulation process - A systematic review. Vol. 13, Journal of Environmental Health Science and Engineering. Journal of Environmental Health Science and Engineering; 2015. https://doi.org/10.1186/s40201-015-0233-8
Joseph L, Jun B, Flora JR V, Min C, Yoon Y. Chemosphere Removal of heavy metals from water sources in the developing world using low-cost materials : A review. Chemosphere. 2019;229:142–59. https://doi.org/10.1016/j.chemosphere.2019.04.198
Vasilyuk SL, Maltseva T V., Belyakov VN. Influence of water hardness on removal of copper ions by ion-exchange-assisted electrodialysis. Desalination. 2004;162(1–3):249–54. https://doi.org/10.1016/S0011-9164(04)00048-7
Haase S. CEPI the European Paper Industry now aims for the “eternal flame.” Int Pap IPW. 2012;24(12):29–30.
Vasudevan S, Lakshmi J. Effects of alternating and direct current in electrocoagulation process on the removal of cadmium from water - A novel approach. Sep Purif Technol. 2011;80(3):643–51. https://doi.org/10.1016/j.seppur.2011.06.027
Nepo J, Gourich B, Cha M, Stiriba Y, Vial C, Drogui P, et al. Electrocoagulation process in water treatment : A review of electrocoagulation modeling approaches. 2017;404:1–21. https://doi.org/10.1016/j.desal.2016.10.011
Mollah MYA, Morkovsky P, Gomes JAG, Kesmez M, Parga J, Cocke DL. Fundamentals, present and future perspectives of electrocoagulation. J Hazard Mater. 2004;114(1–3):199–210. https://doi.org/10.1016/j.jhazmat.2004.08.009
Paul AB. Electrolytic treatment of turbid water in package plant. Reach Unreach - Challenges 21st Century Proc 22nd WEDC Conf. 1996;286–8.
Syam Babu D, Anantha Singh TS, Nidheesh P V., Suresh Kumar M. Industrial wastewater treatment by electrocoagulation process. Sep Sci Technol. 2019;00(00):1–33. https://doi.org/10.1080/01496395.2019.1671866
Elazzouzi M, Haboubi K, Elyoubi MS. Electrocoagulation flocculation as a low-cost process for pollutants removal from urban wastewater. Chem Eng Res Des. 2017;117:614–26. https://doi.org/10.1016/j.cherd.2016.11.011
Islam SMD-U. Electrocoagulation (EC) technology for wastewater treatment and pollutants removal. Sustain Water Resour Manag. 2019;5(1):359–80. https://doi.org/10.1007/s40899-017-0152-1
Garcia-Segura S, Eiband MMSG, de Melo JV, Martínez-Huitle CA. Electrocoagulation and advanced electrocoagulation processes: A general review about the fundamentals, emerging applications and its association with other technologies. J Electroanal Chem. 2017;801:267–99. https://doi.org/10.1016/j.jelechem.2017.07.047
Cheballah K, Sahmoune A, Messaoudi K, Drouiche N, Lounici H. Simultaneous removal of hexavalent chromium and COD from industrial wastewater by bipolar electrocoagulation. Chem Eng Process Process Intensif. 2015;96:94–9. https://doi.org/10.1016/j.cep.2015.08.007
Chen G. Electrochemical technologies in wastewater treatment. Sep Purif Technol. 2004;38(1):11–41. https://doi.org/10.1016/j.cep.2015.08.007
Syversen U. State-of = the-Art Electrof locculation. 1995;(February):153–6.
Sahu O, Mazumdar B, Chaudhari PK. Treatment of wastewater by electrocoagulation: A review. Environ Sci Pollut Res. 2014;21(4):2397–413. https://doi.org/10.1007/s40201-018-0314-6
Lakshmanan D, Clifford DA, Samanta G. Ferrous and ferric ion generation during iron electrocoagulation. Environ Sci Technol. 2009;43(10):3853–9. https://doi.org/10.1021/es8036669
Aoudj S, Khelifa A, Drouiche N, Belkada R, Miroud D. Simultaneous removal of chromium(VI) and fluoride by electrocoagulation-electroflotation: Application of a hybrid Fe-Al anode. Chem Eng J. 2015;267(Vi):153–62. https://doi.org/10.1016/j.cej.2014.12.081
Xu L, Cao G, Xu X, Liu S, Duan Z, He C, et al. Simultaneous removal of cadmium, zinc and manganese using electrocoagulation: Influence of operating parameters and electrolyte nature. J Environ Manage. 2017;204:394–403. https://doi.org/10.1016/j.jenvman.2017.09.020
Lu J, Wang ZR, Liu YL, Tang Q. Removal of Cr ions from aqueous solution using batch electrocoagulation: Cr removal mechanism and utilization rate of in situ generated metal ions. Process Saf Environ Prot. 2016;104:436–43. https://doi.org/10.1016/j.psep.2016.04.023
Zongo I, Leclerc JP, Maïga HA, Wéthé J, Lapicque F. Removal of hexavalent chromium from industrial wastewater by electrocoagulation: A comprehensive comparison of aluminium and iron electrodes. Sep Purif Technol. 2009;66(1):159–66. https://doi.org/10.1016/j.seppur.2008.11.012