Banana Peel Waste as a Biosorbent for Pb(II) Ions in Aqueous Solution: Isotherm and Kinetic Study
Pemanfaatan Limbah Kulit Pisang sebagai Bioadsorben Ion Pb(II) dalam Larutan: Kajian Isoterm dan Kinetika Adsorpsi
Abstract
Lead (Pb) is a toxic heavy metal commonly found in industrial wastewater. This study examined NaOH-activated banana peel as a biosorbent for Pb(II) ions. The material was characterised by FTIR and SEM and tested at different pH values, contact times and initial concentrations. Optimum adsorption occurred at pH 5 and 60 minutes, with 92.4% removal. Equilibrium data fitted the Langmuir isotherm best (R2 = 0.991) with a maximum capacity of 34.7 mg/g, and kinetics followed the pseudo-second-order model (R2 = 0.998). Banana peel is a promising low-cost biosorbent for lead-contaminated wastewater.
Keywords
- biosorbent
- banana peel
- lead
- Langmuir isotherm
- kinetics
References
Annadurai, G., Juang, R. S., & Lee, D. J. (2003). Adsorption of heavy metals from water using banana and orange peels. Water Science and Technology, 47(1), 185–190.
Demirbas, A. (2008). Heavy metal adsorption onto agro-based waste materials: A review. Journal of Hazardous Materials, 157(2–3), 220–229.
Fu, F., & Wang, Q. (2011). Removal of heavy metal ions from wastewaters: A review. Journal of Environmental Management, 92(3), 407–418.
Ho, Y. S., & McKay, G. (1999). Pseudo-second order model for sorption processes. Process Biochemistry, 34(5), 451–465.
Langmuir, I. (1918). The adsorption of gases on plane surfaces of glass, mica and platinum. Journal of the American Chemical Society, 40(9), 1361–1403.
License
Copyright (c) 2026 Ahmad Fauzi, Sri Wahyuni
This work is licensed under a Creative Commons Attribution 4.0 International License.
