Purification of Heavy Metals Contaminated Groundwater by Electro-coagulation Process Using Graphite Electrodes

Document Type : Original Article

Authors

Clean Energy, Environmental Research Laboratory, Department of Chemical Engineering, University of Ilorin, Nigeria

10.34172/jaehr.2023.10

Abstract

Background: The subject of this study was the application of the electro-coagulation process to a contaminated groundwater identified in the Abala community, which is a suburb of the Ilorin metropolis in Kwara state, Nigeria.
Methods: The electro-coagulation process was applied to the groundwater samples in a 2.5-L batch reactor containing 1 L of the contaminated water. Each run lasted for 1 hour, and a DC power supply was used with a voltage range of 10 to 20 V at a constant current of 5 amp, or 2amp to 6amp at a constant voltage of 10 V. Also, graphite electrodes were employed in the process.
Results: The results revealed that the electro-coagulation process could reduce turbidity, total dissolved solids (TDS), electrical conductivity (EC), biological oxygen demand (BOD), total organic carbon (TOC), chemical oxygen demand (COD), and color by 97.3, 91.2, 91.1, 96, 99.7, 99.7%, 79.9%, and 82.96%, respectively. Through an atomic absorption spectroscopy analytical study, the process also showed removal efficiency of manganese (Mn), iron (Fe), and zinc (Zn) of 82.96%, 70.0%, and 95.30%, respectively. The results of the electro-coagulation process met the drinking water and general industrial wastewater discharge guidelines set by the World Health Organization (WHO), the United States Environmental Protection Agency (USEPA), and the Water Environment Partnership in Asia (WEPA).
Conclusion: The observations of this study indicated that electro-coagulation is an efficient and effective treatment method for the contaminated groundwater. Therefore, this study recommends the use of electro-coagulation for treating contaminated groundwater in Nigeria.

Keywords

Main Subjects

References

  1. Muhibbudin IE, Ebube OV, Asuquo BD, Adepoju M, Mubarak S, Adebanjo S, et al. Assessment of an atmospheric heavy metal from a transport pool within the Ilorin metropolis, Nigeria. J Part Sci Technol. 2021;7(1):11-21. doi: 22104/jpst.2021.5107.1191.
  2. Babel S, Kurniawan TA. Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan. Chemosphere. 2004;54(7):951-67. doi: 1016/j.chemosphere.2003.10.001.
  3. Borba CE, Guirardello R, Silva EA, Veit MT, Tavares CRG. Removal of nickel(II) ions from aqueous solution by biosorption in a fixed bed column: experimental and theoretical breakthrough curves. Biochem Eng J. 2006;30(2):184-91. doi: 1016/j.bej.2006.04.001.
  4. Siringi DO, Home P, Chacha JS, Koehn E. Is electrocoagulation (EC) a solution to the treatment of wastewater and providing clean water for daily use. ARPN J Eng Appl Sci. 2012;7(2):197-204.
  5. Can OT, Bayramoglu M, Kobya M. Decolorization of reactive dye solutions by electrocoagulation using aluminum electrodes. Ind Eng Chem Res. 2003;42(14):3391-6. doi: 1021/ie020951g.
  6. Daneshvar N, Oladegaragoze A, Djafarzadeh N. Decolorization of basic dye solutions by electrocoagulation: an investigation of the effect of operational parameters. J Hazard Mater. 2006;129(1-3):116-22. doi: 1016/j.jhazmat.2005.08.033.
  7. Chen G. Electrochemical technologies in wastewater treatment. Sep Purif Technol. 2004;38(1):11-41. doi: 1016/j.seppur.2003.10.006.
  8. Can OT, Kobya M, Demirbas E, Bayramoglu M. Treatment of the textile wastewater by combined electrocoagulation. Chemosphere. 2006;62(2):181-7. doi: 1016/j.chemosphere.2005.05.022.
  9. Phalakornkule C, Polgumhang S, Tongdaung W, Karakat B, Nuyut T. Electrocoagulation of blue reactive, red disperse and mixed dyes, and application in treating textile effluent. J Environ Manage. 2010;91(4):918-26. doi: 1016/j.jenvman.2009.11.008.
  10. Benhadji A, Taleb Ahmed M, Maachi R. Electrocoagulation and effect of cathode materials on the removal of pollutants from tannery wastewater of Rouïba. Desalination. 2011;277(1-3):128-34. doi: 1016/j.desal.2011.04.014.
  11. Valero D, Ortiz JM, García V, Expósito E, Montiel V, Aldaz A. Electrocoagulation of wastewater from almond industry. Chemosphere. 2011;84(9):1290-5. doi: 1016/j.chemosphere.2011.05.032.
  12. Tahboub MA. Evaluation of wastewater treatment alternatives for Hebron City [dissertation]. Hebron, Palestine: West Bank; 2000.
  13. Chen G, Chen X, Yue PL. Electrocoagulation and electroflotation of restaurant wastewater. J Environ Eng. 2000;126(9):858-63.
  14. Rizzo L, Manaia C, Merlin C, Schwartz T, Dagot C, Ploy MC, et al. Urban wastewater treatment plants as hotspots for antibiotic resistant bacteria and genes spread into the environment: a review. Sci Total Environ. 2013;447:345-60. doi: 1016/j.scitotenv.2013.01.032.
  15. Pouet MF, Grasmick A. Urban wastewater treatment by electrocoagulation and flotation. Water Sci Technol. 1995;31(3-4):275-83. doi: 1016/0273-1223(95)00230-k.
  16. Lai CL, Lin SH. Treatment of chemical mechanical polishing wastewater by electrocoagulation: system performances and sludge settling characteristics. Chemosphere. 2004;54(3):235-42. doi: 1016/j.chemosphere.2003.08.014.
  17. Phalakornkule C, Sukkasem P, Mutchimsattha C. Hydrogen recovery from the electrocoagulation treatment of dye-containing wastewater. Int J Hydrogen Energy. 2010;35(20):10934-43. doi: 1016/j.ijhydene.2010.06.100.
  18. Abuzaid NS, Al-Hamouz Z, Bukhari AA, Essa MH. Electrochemical treatment of nitrite using stainless steel electrodes. Water Air Soil Pollut. 1999;109(1):429-42. doi: 1023/a:1005024012610.
  19. Ögütveren ÜB, Gönen N, Koparal S. Removal of dye stuffs from waste water: electrocoagulation of Acilan Blau using soluble anode. J Environ Sci Health Part A. 1992;27(5):1237-47. doi: 1080/10934529209375794.
  20. Danert K, Healy A. Monitoring groundwater use as a domestic water source by urban households: analysis of data from Lagos State, Nigeria and sub-Saharan Africa with implications for policy and practice. Water. 2021;13(4):568. doi: 3390/w13040568.
  21. Tunde AM. Motivations for involvement in urban catfish farming and sustainable food security in Nigeria. An Univ Oradea Ser Geogr. 2017;27(2):236-45.
  22. Ajadi BS, Adeniyi A, Afolabi MT. Impact of climate on urban agriculture: case study of Ilorin city, Nigeria. Glob J Hum Soc Sci. 2011;11(1):24-30.
  23. Bazrafshan E, Ownagh KA, Mahvi AH. Application of electrocoagulation process using iron and aluminum electrodes for fluoride removal from aqueous environment. E-J Chem. 2012;9(4):2297-308.
  24. Bukhari AA. Investigation of the electro-coagulation treatment process for the removal of total suspended solids and turbidity from municipal wastewater. Bioresour Technol. 2008;99(5):914-21. doi: 1016/j.biortech.2007.03.015.
Journal of Advances in Environmental Health Research
Volume 11, Issue 2
April 2023
Pages 82-88

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