Sulfhydryl Functionalized Magnetic Chitosan as an Efficient Adsorbent for High-Performance Removal of Cd(II) from Water: Adsorption Isotherms, Kinetic, and Reusability Studies

In this study, dimercaptosuccinic acid-functionalized magnetic chitosan (Fe3O4@CS@DMSA) was synthesized via in situ coprecipitation process and amidation reaction, aiming to eliminate cadmium (Cd(II)) ions from an aqueous environment. The structure, morphology, particle size of the Fe3O4@CS@DMSA adsorbent were investigated using FTIR, TEM, EDX, TGA, zeta potential, XRD techniques, obtained results approved successful synthesis nanocomposite. influence external adsorption conditions such as pH solution, mass, initial Cd(II) concentration, temperature, contact time on successfully achieved. Accordingly, pH: 7.6, time: 210 min, mass:10 mg found be optimal for best removal. analyzed nonlinear isotherm kinetic models. outcomes revealed that obeyed Langmuir pseudo-first-order maximum capacity toward ion 314.12 mg/g. mechanism nanocomposite is electrostatic interaction. reusability test exhibited efficiency 72% after 5th cycle. Finally, research indicates excellent characteristics high capacity, effective adsorption-desorption results, easy separation thus could removing solutions.