Kinetic Analysis of the Sorption Removal of Copper (II) from Aqueous Solution by Plantain Peel

Daniel Enajeme; George Okeroghene

Daniel Enajeme Lecturer, Department of Pure and Applied Chemistry, Faculty of Natural and Applied Sciences, Veritas University, Abuja, Nigeria.
George Okeroghene Student, Department of Chemistry, Federal College of Education, Pankshin, Nigeria.

Abstract

Introduction: In this study, the removal of toxic metals Cu (II) from aqueous solution has been investigated with the aim of detoxifying industrial effluents before their safe disposal onto land or into the river.
Method: A low-cost natural adsorbent, plantain peel was used to remove Cu (II) ions from the aqueous solution. The effects of initial concentration, pH, contact time, and adsorbent dosage rate of adsorption on adsorption efficiency were investigated.
Results: Generally, the result showed an increase in removal efficiency with an increase in contact time and a decrease in initial concentration. The kinetic study revealed that the pseudo-second-order model is suitable to explain all our experimental data. The adsorption equilibrium data correlate well with the Langmuir adsorption model, having a higher regression coefficient (R2) value than the Freundlich model. The results showed that the adsorption capacity of plantain peel powder for Cu (II) ion removal is 217 mg/g.
Conclusion: The high adsorption capacity of the tested adsorbents makes it a preferable, very cheap, and environment-friendly alternative adsorption material.

References

1. Aprile A. Bellis L. Editorial for special issue heavy metals accumulation, toxicity, and detoxification in plants. Int
J Mol Sci. 2020 Jun 9;21(11):4103.
2. Hussain A, Madan S, Madan R. Removal of heavy metals from wastewater by adsorption. In: Khaled Nazal M,
Zhao H, editors. Heavy metals - their environmental impacts and mitigation. IntechOpen; 2021.
3. Ayob S, Othman N, Altowayti WA, Khalid FS, Bakar NA, Tahir M, et al. A review on adsorption of heavy metals
from wood-industrial wastewater by oil palm waste. J Ecol Eng. 2021;22(3):249-65.
4. Ojedokun AT, Bello OS. Sequestering heavy metals from wastewater using cow dung. Water Res Ind. 2016
Mar 1;(13):7-13.
5. Musah M, Yakubu A, Matthew JT, Tanko MU, Abdulhamid Z, Muhammad A. Adsorption kinetics and isotherm models: a review. Caliphate J Sci Technol. 2022;4(1):20-6.