Thermodynamic Study of Soluos Dumpsite Leachate Treatment Using Agricultural Waste as Biosorbent

Abstract

Thermodynamics plays a vital role in leachate treatment by providing insights into the nature of the adsorption process. This study investigated the thermodynamics of Lagos dumpsite leachate treatment using Musa sapientum (banana) peels as a biosorbent to establish the adsorption process's characteristics. The biosorbent was prepared from banana peels collected from a local market in Epe, Lagos State. The adsorption process was conducted at varying temperatures (303–423 K) using leachate from the Soluos dumpsite. Results showed that the percentage removal of total dissolved solids (TDS) decreased with increasing temperature, with removals of 76.89% at 303 K and 62.92% at 423 K. Gibbs free energy (ΔG°) values ranged from 2.772 to 6.236 KJ/mol, indicating a non-spontaneous and endergonic process. The enthalpy (ΔH°) value of –5.873 KJ/mol confirmed the exothermic nature of the adsorption, while the entropy (ΔS°) value of –28.589 J/mol.K suggested decreased randomness at the biosorbent-leachate interface. The study concluded that the thermodynamic parameters derived can guide the design of leachate treatment systems using Musa sapientum peels as an eco-friendly biosorbent.