Isotherms and Mass Transfer Modeling of the Adsorption of Copper Ions onto Iron-Activated Carbon Composite

This study utilized a composite of iron-activated carbon derived from waste date. The adsorbent, made by mixing iron sulfate in a specific way, was examined using X-Ray Diffraction (XRD) and scanning electron microscopy (SEM). We used it to eliminate copper ions Cu(II) in pre-prepared solutions of copper sulfate. The equilibrium data were found to be better described by the Freundlich model with R۲>۰.۹۹, and the energy of mean adsorption was E=۳.۵۳ kJ/mol adsorption kinetics were successfully fitted with a pseudo-second-order model. Results indicated that the film and pore diffusion coefficients ranged within a specific value۱۰-۱۰ cm۲/s, suggesting that pore diffusion is the rate-limiting step. This study highlights the importance of both external mass transfer and intra-particle diffusion in the adsorption of copper.

کلیدواژه ها:

Water treatment ، adsorbent ، dates waste ، copper ions ، wastewater