Plant assisted green synthesis of mesoporous magnesium oxide nanoparticles for the effective removal of Carmoisine Red dye through adsorption from aqueous system: kinetic, thermodynamic, desorption and reusability studiesNavak Badr and Muhammad Hamayun Department of Chemistry, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
E-mail: hamayunf@yahoo.com Received: 6 October 2025 Accepted: 31 December 2025 Abstract: Here, the sustainable green magnesium oxide nanoparticles were prepared and used as an efficient and novel adsorbent for the removal of Carmoisine Red dye from aqueous system. The morphology, crystallinity, and surface properties were analysed through X-Ray Diffraction, SEM, EDX, FTIR, UV–vis spectroscopy, and BET adsorption desorption algorithm confirming the face centered cubic structure with purity, flakes like morphology, mesoporous nanoparticles having 18.997 m2/g surface area with a pore size of 2.769 nm with a surface charge of 8. Batch adsorption studies conducted under different operating parameters like dye concentration (5–50 ppm), contact time (0–150 min), dose of adsorbent (0.05–1 g), and temperature (285–321 K). The pseudo second order model and the Langmuir isotherm well fitted the adsorption data, indicating monolayer adsorption with 143.8849 mg/g amount adsorbed at 321 K. Enthalpy, entropy and Gibb’s free energy values confirmed an endothermic and spontaneous adsorption process with increased randomness at the adsorbent-dye interface. The regeneration results showed that they retain about 80–90% of their initial efficiency after 5 cycles. This study highlights the potential of this nanoparticle as efficient adsorbent for sustainable wastewater treatment. Graphical abstract Keywords: Carmoisine red dye; MgO nanoparticles; Adsorption; Kinetic & thermodynamic study; Regeneration of adsorbent Full paper is available at www.springerlink.com. DOI: 10.1007/s11696-026-04647-2
Chemical Papers 80 (4) 3749–3772 (2026) |
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