Functionalization of CeO2-SiO2-(CH2)3-Cl nanoparticles with sodium alginate for enhanced and effective CdII, PbII, and ZnII ions removal by microwave irradiation and adsorption technique

Document Type



A novel nanocomposite cored of cerium oxide nanoparticles (CeO2) linked with sodium alginate (Sod. Alg) using 3-chloroopropyltrimethoxysilane was synthesized via a green synthesis method using microwave irradiation to yield a new (CeO2-Si-(CH2)3-Alg) nanocomposite. Its characteristics were evaluated using Fourier-transform infrared sptectroscopy (FT-IR), thermogravimetric thermal analysis (TGA), X-ray powder diffraction (XRD), Energy Dispersive X-rays (EDX), scanning-electron microscope (SEM) and high-resolution transmission-electron microscope (HR-TEM) to prove the possible binding between the reactants, as well as to illustrate the composition of this new nanomaterial. The SEM and HR-TEM established that the average particle size of the nanocomposite was 86.52 nm. The nanocomposite was investigated for the remediation of PbII, CdII and ZnII ions from water using the microwave sorption process. Various controlling parameters were monitored during the remediation processes, including pH of contact solution, irradiation time, ionic concentration of the target metals, and the mass dosage of nanocomposite. The maximum metal up-take capacities were 1434.5, 118.9, and 61.68 mgg−1 for PbII, CdII and ZnII, respectively by applying 1.0 mL of 0.1 mol L-1 metal ion concentration, 11−13 second irradiation time, pH 7.0, and 5.0 mg mass of the CeO2-Si-(CH2)3-Alg nanocomposite. The adsorption kinetics of PbII, CdII, and ZnII ions onto CeO2-Si-(CH2)3-Alg nanocomposite proved to fit the pseudo-second-order kinetics model. The adsorption mechanism fitted the Freundlich isotherm model more than it did with the Langmuir model. This study confirmed the excellent characteristics of the CeO2-Si-(CH2)3-Alg nanocomposite in the remediation of heavy metals from aqueous solutions.

Publication Date



Faculty of Dentistry

Subject Area

Physical Sciences, General Environmental Science, General Materials Science

Indexed in Scopus







Adsorption isotherms, Cd -Pb -Zn II II II, Cerium oxide nanoparticles, Kinetics, Remediation, Sodium alginate