EVERGREEN

Joint Journal of Novel Carbon Resource Sciences and Green Asia Strategy

ISSN:2189-0420 (Print until Mar 2020)
ISSN:2432-5953 (Online)

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Competitive Adsorption of La3+/Ce3+/Nd3+ Ions on Poly (Methyl Methacrylate)-co-Diacrylate/Single-Walled Carbon Nanotube Nanocomposites

Nurul Jamilah1,2, Asep Riswoko3, Adam Badra Cahaya4,*
1Department of Physics, Faculty of Mathematics and Natural Sciences, University of Indonesia, Indonesia
2Research Center for Polymer Technology, National Research and Innovation Agency (BRIN), Indonesia
3Directorate of Research and Innovation Partnerships, National Research and Innovation Agency (BRIN), Indonesia
4Department of Physics, Faculty of Mathematics and Natural Sciences, University of Indonesia, 16424, Depok, Indonesia
*Author to whom correspondence should be addressed:
E-mail: adam@sci.ui.ac.id (ABC)
Evergreen, Vol. 12, Iss. 03, pp. 1468–1483, 2025
DOI: 10.5109/7388842
Creative Commons Attribution 4.0 International Creative Commons Attribution 4.0 International
Received: October 29, 2024 | Revised: June 07, 2025 | Accepted: July 02, 2025 | Published: September 2025
Abstract
Recovery of rare earth elements (REEs) is one of the important processes in high-end industries using critical raw materials. In this study, we developed a new microencapsulated nanocomposite adsorbent consisting of poly(methyl methacrylate) copolymerized with liquid crystal diacrylate (RM 257) and single-walled carbon nanotube (SWCNT). The adsorbent was synthesized by oil-in-water (O/W) emulsion polymerization with the ratio 1:7 and aimed to recover La3+, Ce3+, and Nd3+ ions in an aqueous solution. The FTIR and Raman spectroscopy results confirm the components that formulate this microencapsulation. Besides that, FTIR, BET, and SEM-EDS have characterized the microencapsulated adsorbents before and after adsorption. The morphology and element mapping using SEM-EDS showed that Ce3+ and Nd3+ ions are distributed well on the surface of the adsorbent, whereas La3+ diffused into the pores of the adsorbent. The kinetics and isotherm models have been fitted to evaluate the competitive adsorption of La/Ce/Nd ions at low concentrations (0.5–6 mg/L). The study found that the adsorption of La3+, Ce3+, and Nd3+ ions in an aqueous solution followed pseudo-second-order kinetics and the Freundlich isotherm model. The maximum adsorption capacity was 0.1538, 0.1352, and 0.1217 mg/g for La3+, Nd3+, and Ce3+ ions.
Keywords
adsorption ; nanocomposite ; carbon nanotube ; rare earth element ; microencapsulation
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