Enhanced extraction of methylene blue by dodecyl-methyl imidazolium dodecyl sulfate GUMBOS - magnetic alginate beads

Taiwo Bakare-Abidola; William J A Russell; Kyle Jorgensen; Rocío L Pérez

doi:10.1016/j.chemosphere.2024.143991

Enhanced extraction of methylene blue by dodecyl-methyl imidazolium dodecyl sulfate GUMBOS - magnetic alginate beads

Chemosphere. 2024 Dec 23:370:143991. doi: 10.1016/j.chemosphere.2024.143991. Online ahead of print.

Authors

Taiwo Bakare-Abidola¹, William J A Russell¹, Kyle Jorgensen¹, Rocío L Pérez²

Affiliations

¹ Center for Advanced Materials Science (CAMS), Department of Biochemistry, Chemistry, and Physics, Georgia Southern University, Statesboro, GA, 30458, United States.
² Center for Advanced Materials Science (CAMS), Department of Biochemistry, Chemistry, and Physics, Georgia Southern University, Statesboro, GA, 30458, United States. Electronic address: rperez@georgiasouthern.edu.

PMID: 39701321
DOI: 10.1016/j.chemosphere.2024.143991

Abstract

In this study, dodecyl-methyl imidazolium dodecyl sulfonate ([C₁₂MIm][DS]) GUMBOS were synthesized and incorporated into alginate with γ-Fe₂O₃ to fabricate magnetic adsorbent beads ([C₁₂MIm][DS]-beads) for methylene blue (MB) removal. Characterization via ESI-MS, FT-IR, SEM, BET, and TGA confirmed their structure and properties. The beads achieved a maximum adsorption capacity of 4.5 mg/g at pH 10 with an initial MB concentration of 500 mg/L, following pseudo-first-order kinetics and the Langmuir isotherm model. Thermodynamic studies confirmed the process was exothermic. Even after six recycling cycles, the beads retained similar morphology and an MB removal percentage of 57.6%. The beads demonstrated high adsorption efficiency (70%) in the presence of Cu²⁺, ibuprofen, and malachite green, comparable to MB removal alone. These results highlight the potential of [C₁₂MIm][DS]-beads as effective adsorbents for water remediation applications.

Keywords: Adsorption; Alginate beads; GUMBOS; Green removal; Magnetic beads; Sustainability.