Removal of lanthanum and cerium from aqueous solution using chitosan-functionalized magnetite-pectin
Articles > Article · 2024
Authors: Abdoul‑Rachid Chaibou Yacouba, Alparslan Enes Oral, Şenol SERT, İkbal Gözde Kaptanoğlu, Ibrahim Natatou, Sabriye YUŞAN, Şule AYTAŞ
Discover Water, Refereed Journals of Other Institutions, International, Art Index (Art Research Database, EBSCO), 2024, vol 4, pp 1-17
DOI: 10.1007/s43832-023-00054-w
Summary
Abstract The present study synthesized magnetite-pectin-chitosan (MPC), which is a nanocomposite adsorbent through partial reduction co-precipitation method. Its structure and morphology were characterized by Scanning Electron Spectroscopy (SEM), X-ray diffraction (XRD), Fourier Transform Infrared Spectrometry (FT-IR) and Vibrating Sample Magnetometry (VSM). One studied the adsorption of Lanthanum and Cerium ions onto MPC in a batch system as a function of initial pH of solution, contact time, initial concentration and temperature. When the initial pH of the solution increased, the La(III)/Ce(III) ions augmented as well. The optimum pH for La/Ce adsorption was 5 and the maximum adsorption achieved within 30 min. The thermodynamics parameters such as enthalpy ( $$\Delta {\text{H}}^\circ$$ Δ H ∘ ), entropy ( $$\Delta {\text{S}}^\circ$$ Δ S ∘ ) and Gibbs free energy changes ( $$\Delta {\text{G}}^\circ$$ Δ G ∘ ) were calculated with the results suggesting that the adsorption was exothermic and spontaneous. To determine the adsorption characteristics, models of Langmuir, Dubinin-Radushkevich, Freundlich, Temkin and Flory–Huggins adsorption isotherms were performed. Langmuir isotherm model enabled the data of adsorption to be described very well. The adsorption capacity was seen to be 8.17 mg/g and 9.72 mg/g for lanthanum and cerium, respectively. The adsorption kinetics of MPC indicated that the adsorption process fit the Pseudosecond-order (PSO) model. Based on these data, it is concluded that short operating time, eco-friendly technology, and easy to apply MPC can be used for La(III)/Ce(III) ions removal.