Adsorption of 60 Co(II) and 152+154 Eu(III) radionuclides by a sustainable nanobentonite@sodium alginate@oleylamine nanocomposite

A sustainable and efficient nanobentonite@sodium alginate@oleylamine (Nbent@Alg@OA) nanocomposite has been successfully synthesized via coating reaction of nanobentonite (Nbent) with alginate (Alg) and oleylamine (OA). The nanocomposite has been characterized and examined for the adsorption of Co(II...

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Bibliographic Details
Published in:International journal of biological macromolecules 2023-02, Vol.229, p.344
Main Authors: Abdelmonem, Islam M, Allam, Elhassan A, Gizawy, Mohamed A, El-Sharkawy, Rehab M, Mahmoud, Mohamed E
Format: Article
Language:English
Subjects:
Adsorption
Alginates - chemistry
Cobalt Radioisotopes
Hydrogen-Ion Concentration
Kinetics
Nanocomposites - chemistry
Spectroscopy, Fourier Transform Infrared
Water Pollutants, Chemical - chemistry
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Summary:A sustainable and efficient nanobentonite@sodium alginate@oleylamine (Nbent@Alg@OA) nanocomposite has been successfully synthesized via coating reaction of nanobentonite (Nbent) with alginate (Alg) and oleylamine (OA). The nanocomposite has been characterized and examined for the adsorption of Co(II) and Eu(III) radionuclides from simulated radioactive waste solution. FT-IR, XRD, SEM, and HR-TEM techniques have been applied to confirm the structural and morphological characteristics of the Nbent@Alg@OA nanocomposite. The effects of various parameters, such as pH of the medium, initial concentration of the radionuclides, contact time, and temperature on the adsorption of Co(II) and Eu(III) radionuclides were investigated by the batch adsorption technique. The results revealed that the optimum pH values for the adsorption of Eu (III) and Co (II) radionuclides were 4 and 5, respectively. The adsorption capacity of Eu(III) (65.6219 mg/g) was found greater than that of Co(II) (47.3469 mg/g). The adsorption process was found to be well described by the pseudo-second-order kinetic model. Furthermore, the equilibrium isotherm evaluation revealed that the Langmuir model was adequately matched with the adsorption data. According to the thermodynamic characteristics, the adsorption process was endothermic and spontaneous. Regeneration and reuse of Nbent@Alg@OA nanocomposite confirmed that the recycled nanocomposite was sufficiently efficient in several successive practical applications.
ISSN:1879-0003
DOI:10.1016/j.ijbiomac.2022.12.288