The effect of synthesis conditions on the in situ grown MIL-100(Fe)-chitosan beads : Interplay between structural properties and arsenic adsorption
Joseph, J., Väisänen, A., Patil, A. B., & Lahtinen, M. (2024). The effect of synthesis conditions on the in situ grown MIL-100(Fe)-chitosan beads : Interplay between structural properties and arsenic adsorption. Journal of Hazardous Materials, 463, Article 132893. https://doi.org/10.1016/j.jhazmat.2023.132893
Julkaistu sarjassa
Journal of Hazardous MaterialsPäivämäärä
2024Tekijänoikeudet
© 2023 The Author(s). Published by Elsevier B.V.
Efficient sequestration of arsenic from drinking water is a global need. Herein we report eco-friendly porous hybrid adsorbent beads for removal of arsenic, through in situ synthesis of MIL-100(Fe) in the chitosan solvogel. To understand the structural vs. performance correlation, series of hybrid adsorbents were synthesized by modulating synthesis conditions like temperature, crystallization time, and concentration. Adsorbents were investigated using PXRD, FT-IR, SEM, and ICP-OES. Intriguing correlation between crystallinity and adsorption performance was observed as low and high crystalline MIL-100(Fe)-chitosan (ChitFe5 and ChitFe7, respectively) exhibited exceptional adsorption towards As5+ by removing it from water with 99% efficiency, whereas for As3+ species removal of about 85% was afforded. Adsorption isotherms indicated that increase in crystallinity (ChitFe5 -> ChitFe7), adsorption capacities of As5+ and As3+ increased from 23.2 to 64.5, and from 28.1 to 35.3 mg/g, respectively. Selectivity tests of the adsorbents towards As5+ and As3+ over competitive anions in the equimolar competitive systems having nitrates, sulfates, and carbonates demonstrated that the performance of the absorbents was fully maintained, relative to the control system. Through this study a highly selective and efficient adsorbent for arsenic species is designed and a clear insight into the structural tuning and its effect on adsorption performance is provided.
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Julkaisija
ElsevierISSN Hae Julkaisufoorumista
0304-3894Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/194490859
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This study was financially supported by the doctoral school program of the Department of Chemistry at the University of Jyväskylä, Finland.Lisenssi
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