Novel Polymeric Nanocomposite Sorbent for Rare Earth Elements Extraction: Kinetic Study and Process Feasibility | ||
| Egyptian Journal of Chemistry | ||
| Articles in Press, Accepted Manuscript, Available Online from 27 June 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2025.382954.11732 | ||
| Authors | ||
| Shaimaa Abdo Esmaeel* 1; fatma salem Hassan2; mohammed hagag3; Gehan Sadek4; Amr Hamdi Ali5 | ||
| 1هيئة المواد النووية | ||
| 2Nuclear Material Authority | ||
| 3Nuclear Materials Authority | ||
| 4Nuclear Chemistry department Atomic Energy Authority | ||
| 5Reactors Materials Treatment department, Nuclear Materials Authority, P.O. Box 530- Maadi, Cairo-Egypt | ||
| Abstract | ||
| This study evaluates the Itaconic- Acrlyamide - Tris(2-ethylhexyl)phosphate/ Aluminium oxide IA-AM-TEHP/Al2O3) nanocomposite, synthesized via gamma radiation copolymerization at 25 KGy dose, for extracting rare earth elements (REEs) specifically La(III), Ce(III), Nd(III) and Sm(III) - from waste solutions. Optimal sorption conditions occurred at pH 1.5, a 30-minute contact time, and 1000 mg L⁻¹ REE concentration. A sorption capacity of 145.5 mg g-1 is achieved due to composite functional groups, surface characteristics and hybrid binding active sites confirmed by FTIR, SEM, DTA-TGA and particle size characterization and supported by Redlich-Peterson and Toth models. Mechanistically, the process involves both chemical (coordination, ion exchange) and physical (electrostatic, hydrogen bonding) interactions. The sorption process is exothermic, spontaneous, and follows pseudo-second-order kinetics. Efficient recovery of 92% of REEs was achieved using 0.5 M HCl. The findings highlighting the potential of the nanocomposite for REE recovery and environmental applications. | ||
| Keywords | ||
| Polymeric nanocomposite; REEs Extraction; Sorption; Desorption studies | ||
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