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Synthesis of low-cost bentonite/Duranta erecta’s fruit powder imbedded alginate beads and its application in surfactant removal

  • Bio/processes for Sustainable Environment and Clean Energy
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Abstract

High industrialization and improved medical facilities are deteriorating aquatic bodies through untreated effluents. This study is aimed to design and characterize the bentonite, Duranta erecta, and their hybrid-alginate beads for the removal of cetyltrimethylammonium bromide (CTAB) from its aqueous solution. D. erecta’s seed powder was treated by using a sonochemical method and embedded into alginate beads. All designed beads were characterized by using physicochemical methods, Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) technique. Hybrid beads were found to form an appropriate hydrogel structure with maximum surface area per unit gram (544 cm2 g−1), 0.42 mg dry weight, and 2.70 mm diameter. Kinetics and intraparticle diffusion models were fitted where involvement of both chemisorption and intraparticle diffusion was observed during the initial 30 and post-30-min phase, respectively. Thermodynamic studies corroborated the spontaneity of the CTAB adsorption process. Bentonite alginate beads showed the highest adsorption capacity of 97.06 mg g−1 in 100 mg L−1 CTAB solution at optimized conditions, while hybrid-alginate beads showed excellent efficiency with a wide range of physicochemical conditions frame. Conclusively, designed beads can be used to remove the surfactant, i.e., CTAB, from industrial waste effluents for the betterment of water reservoirs.

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Acknowledgements

The authors would like to acknowledge the Department of Chemical Engineering and Central Instruments Facility, Indian Institute of Technology Guwahati, for providing all logistic and analytical facilities for this work. Soma Chauhan would like to thank the University Institute of Engineering and Technology, Kurukshetra University, Kurukshetra, Haryana, for granting permission to carry out this work at the Indian Institute of Technology Guwahati.

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All data generated or analyzed during this study are included in this published article.

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Contributions

Conceptualization: Dr. Animes Kumar Golder, Soma Chauhan, and Ravi Ravi; methodology: Soma Chauhan and Ravi Ravi; formal analysis and investigation: Soma Chauhan (major contribution) and Ravi Ravi; writing—original draft preparation: Ravi Ravi (major contribution) and Soma Chauhan; writing—review and editing: Dr. Animes Kumar Golder; funding acquisition: Dr. Animes Kumar Golder; resources: Dr. Animes Kumar Golder, Soma Chauhan, and Ravi Ravi; supervision: Dr. Animes Kumar Golder.

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Correspondence to Animes Kumar Golder.

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The authors declare no competing interests.

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Responsible Editor: Tito Roberto Cadaval Jr

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Highlights

• Bentonite/Duranta erecta’s fruit powder imbedded alginate beads effective removal of cetyltrimethylammonium bromide.

• Bentonite-alginate beads showed maximum adsorption capacity of 2862 mg g−1.

• Removal involves rapid surface adsorption followed by intraparticle diffusion.

• Kinetic studies and thermodynamic studies confirmed chemisorption and spontaneous nature of adsorption.

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Golder, A.K., Chauhan, S. & Ravi, R. Synthesis of low-cost bentonite/Duranta erecta’s fruit powder imbedded alginate beads and its application in surfactant removal. Environ Sci Pollut Res 28, 58945–58957 (2021). https://doi.org/10.1007/s11356-021-14306-6

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  • DOI: https://doi.org/10.1007/s11356-021-14306-6

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