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Modified Wheat Starch Granules for Ibuprofen Adsorption in Aqueous Solution

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Abstract

Cross-linked cationic wheat starches (CLCS) of different degree of substitution (DS) of quaternary ammonium groups were synthesized with or without the addition of CaO and used for ibuprofen (IB) adsorption in an aqueous solution. The equilibrium adsorption of IB onto modified starch granules was investigated. The parameters of the Dubinin-Radushkevich, Fowler-Guggenheim, Freundlich, and Langmuir adsorption models were calculated and revealed that the driving forces of adsorption were electrostatic interactions between quaternary ammonium groups of modified starch and carboxylate groups of IB. The adsorption process was best described by employing the Langmuir isotherm model and the highest adsorption capacity for IB uptake equal to 550 mg/g was achieved by using CLCS with DS of quaternary ammonium groups of 0.51. The addition of CaO to the synthesis mixture improved the adsorption properties of CLCS granules and allowed to generate a potential sorbent for the removal of IB from the aqueous solution.

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All the data generated or analyzed within the frame of the present investigation are included in this manuscript.

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All authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by Karolina Almonaityte, Joana Bendoraitiene, and Vesta Navikaite-Snipaitiene. The first draft of the manuscript was written by Karolina Almonaityte and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Conceptualization: Karolina Almonaityte, Joana Bendoraitiene, Vesta Navikaite-Snipaitiene, Ramune Rutkaite; methodology: Karolina Almonaityte, Joana Bendoraitiene, Vesta Navikaite-Snipaitiene; formal analysis and investigation: Karolina Almonaityte, Joana Bendoraitiene; writing—original draft preparation: Karolina Almonaityte; writing—review and editing: Joana Bendoraitiene, Vesta Navikaite-Snipaitiene, Ramune Rutkaite; supervision: Joana Bendoraitiene, Ramune Rutkaite.

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Correspondence to Karolina Almonaityte.

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Almonaityte, K., Bendoraitiene, J., Navikaite-Snipaitiene, V. et al. Modified Wheat Starch Granules for Ibuprofen Adsorption in Aqueous Solution. Water Air Soil Pollut 234, 447 (2023). https://doi.org/10.1007/s11270-023-06475-6

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  • DOI: https://doi.org/10.1007/s11270-023-06475-6

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