Özet:

This study demonstrated the efficacy of leftover orange peel in removing Pb2+ ions from aqueous solutions. The effects of contact time, starting metal ion concentration, and pH on adsorption effectiveness were investigated. A starting concentration of 800 mg/L, a contact time of 90 minutes, and a solution pH of 4.32 were found to be the best working conditions for the removal of the Pb2+ ion. In order to examine the surface characteristics of the orange peel, SEM, energy dispersion spectroscopy, and Fourier transform infrared spectroscopy were all used (FT-IR). The outcomes showed that the isotherm data was sufficient for the Langmuir isotherm model, which deals with chemical adsorption and the likely irreversibility of the process. The Pb2+ ion's adsorption capacity was found to be 35.842, 35.714, and 35.087 mg/g at 318, 308, and 298 K, respectively. Pseudo-second order, which had the highest coefficient of regression and best described the kinetic data for Pb2+ adsorption. Thermodynamic investigations revealed that the removal of the Pb2+ ion from orange peel was a natural and exothermic process. Due to its great taking away capability, leftover orange peel has been discovered to be an effective and promising material for the absorption of Pb2+ ions from the aqueous environment. It is also simple to get and inexpensive.

Anahtar Kelimeler: