Bentonite Clay as an Alternative Adsorbent for Removal of Heavy Metals in wastewater
Abstract
This study investigates the potential of bentonite clay as an alternative adsorbent for removing heavy metals from abattoir wastewater. Laboratory experiments were conducted to evaluate the effectiveness of bentonite clay in removing six heavy metals, including Lead, Chromium, Arsenic, Cadmium, Zinc and Iron. Results show that bentonite clay effectively removed all heavy metals, with removal efficiencies ranging from 75% to 95%. The study also found that the adsorption efficiency of bentonite clay increased with increasing initial metal concentration and decreasing pH of the solution. Freundlich and Langmuir models were used to predict the adsorption process, and the R2 values for both models were similar. This suggests that both models were equally adequate or inadequate in describing the process. The study concludes that bentonite clay is a promising adsorbent for removing heavy metals from wastewater. It is recommended that the use of bentonite clay as an alternative adsorbent for heavy metal removal should be further explored and optimized, particularly in terms of operating conditions such as pH, contact time, and adsorbent dosage.References
Abdi, S., Behzadi, M., and Soltani, R. D. C. (2016). Removal of heavy metals from industrial wastewater using bentonite clay and zeolite: a review. Environmental Science and Pollution Research, 23(2), 900-917. https://doi.org/10.1007/s11356-015-5655-7
Alexander J. A, M.A.A. Zaini, A. Surajudeen, E. U. Aliyu and A.U. Omeiza (2018): Surface modification of low-cost bentonite adsorbents—A review, Particulate Science and Technology, DOI: 10.1080/02726351.2018.1438548.
Daffi R.E., Alfa M.I., Wamyi F.B. and Lagasi, J.E. (2023). Comparative Study of the effectiveness of lemon and banana peels powder as Natural Coagulants for domestic wastewater Treatment. Fuoye Journal of Engineering and Technology, 8(2), 247-252. http://doi.org/10.46792/fuoyejet.v8i2.1000
Emam E.A, (2013). Modified activated carbon and bentonite used to adsorb petroleum hydrocarbons emulsified in aqueous solution. American Journal of Environmental Protection. Vol. 2, No. 6, 2013, pp. 161-169. doi: 10.11648/j.ajep.20130206.17
Kennedy, K.K., Maseka, K.J. and Mbulo, M. (2018): Selected Adsorbents for Removal of Contaminants from Wastewater: Towards Engineering Clay Minerals. Open Journal of Applied Sciences, 8, 355-369 https://doi.org/10.4236/ojapps.2018.88027
Liu, C., and Zhang, X. (2019). A review of modified bentonite as a promising adsorbent for environmental remediation. Journal of Environmental Management, 238, 210-222. https://doi.org/10.1016/j.jenvman.2019.02.018
Mona, K., Ahmad, K., Holaila, H., Olamaa, Z. (2014). Heavy Metals Removal Using Activated Carbon, Silica and Silica Activated Carbon Composite. Energy Procedia 50,113– 120.
Ramesh, S. T., & Gandhimathi, R. (2016). Chromium removal from industrial wastewater using modified bentonite clay. Journal of Environmental Management, 182, 35-42. https://doi.org/10.1016/j.jenvman.2016.07.037
Rezapour, M; H. Abdollahi, H. Khorrami and J.T. Valmazuei (2014): Application of raw, HCl- and H2SO4-activated bentonite as adsorbents for the removal of Zn2+ and Pb2+ from aqueous solution, Desalination and Water Treatment, DOI: 10.1080/19443994.2014.987826
Suresh, K., Porkodi, K., and Rocha, F. (2015). Optimization of heavy metal removal using modified bentonite clay. Journal of Environmental Management, 151, 682-693. https://doi.org/10.1016/j.jenvman.2014.12.025
Sheikh A.S, Alsagabi, S. Almeataq, M. Alajyan, T. and Goumri, S.S (2019). Removal of Cd(II) from industrial wastewater using locally available Bentonite Clay. E3S Web of Conferences 117, 00008. https://doi.org/10.1051/e3sconf/201911700008
Tadesse, S.H (2022). Application of Ethiopian bentonite for water treatment containing zinc. Journal of Emerging Contaminants 8 (1): 113-122. https://doi.org/10.1016/j.emcon.2022.02.002
Uyigue, L and Rockson-itiveh, D. (2021): Evaluation of Proposed Treatment Process for Abattoir Wastewater. International Journal of Innovative Science and Research Technology. Volume 6, Issue 4. DOI:10.13140/RG.2.2.21182.66884
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