Facile synthesis of superparamagnetic thiamine/Fe 3 O 4 with enhanced adsorptivity toward divalent copper ions

The development of environmentally friendly adsorbents has been extensively carried out to overcome the detrimental effects of heavy metal accumulation, which has persistently become a global ecological problem. In pursuit of generating eco-friendly adsorbents, a green method for synthesizing thiami...

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Published in:Chemosphere (Oxford) 2022-03, Vol.291 (Pt 2), p.132759
Main Authors: Tran-Nguyen, Phuong Lan, Angkawijaya, Artik Elisa, Ha, Quoc Nam, Tran-Chuong, Yen Nhi, Go, Alchris Woo, Bundjaja, Vania, Gunarto, Chintya, Santoso, Shella Permatasari, Ju, Yi-Hsu
Format: Article
Language:English
Subjects:
Adsorption
Copper
Hydrogen-Ion Concentration
Ions
Kinetics
Magnetic Iron Oxide Nanoparticles
Thiamine
Water Pollutants, Chemical - analysis
Water Purification
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Summary:The development of environmentally friendly adsorbents has been extensively carried out to overcome the detrimental effects of heavy metal accumulation, which has persistently become a global ecological problem. In pursuit of generating eco-friendly adsorbents, a green method for synthesizing thiamine functionalized-Fe O (FT) was developed in this study. A one-step chemical oxidation and functionalization technique was used to prepare FT using the ammonia-containing solvent. A molar ratio of ammonia:Fe:thiamine of 15:1:1 was shown to produce FT15 with high yield, adsorptivity, and purity. XRD, XPS, FTIR, SEM, and SQUID characterization of FT15 revealed the formation of superparamagnetic thiamine functionalized Fe O in their particles. This superparamagneticity facilitates the easy recovery of FT15 particles from the waste-containing solution by using an external magnetic force. The batch adsorption of Cu(II) onto FT15 showed the best fit with the Sips adsorption isotherm model with a maximum adsorption capacity of 426.076 mg g , which is 5.69-fold higher capacity than the control unmodified Fe O (F15). After five adsorption-desorption cycles, the FT15 can maintain up to 1.95-fold higher capacity than the freshly synthesized F15. Observation on the physicochemical properties of the post-adsorption materials showed the contribution of an amine group, pyrimidine ring, and the thiazolium group of thiamine in boosting its adsorption capacity. This study provides important findings to advance the adsorptivity of magnetic adsorbents with promising recoverability from aqueous solution by employing naturally available and environmentally friendly compounds such as thiamine.
ISSN:1879-1298