Preparation and Characterization of Cellulose-clay Composite using Indonesian Natural Bentonite for Cr(VI) Adsorption

Authors

DOI:

https://doi.org/10.47352/jmans.2774-3047.289

Keywords:

adsorption, bentonite, cellulose, Freundlich, montmorillonite

Abstract

Contamination of Cr(VI) is of global concern, whereas the innovation in wastewater treatment is required. Combination of bentonite and cellulose could produce an effective adsorbent to treat Cr(VI)-containing wastewater. The aim of this study was to investigate the use of composite bentonite/cellulose (B/Cell) to remove Cr(VI) in the aqueous media, in which the bentonite was collected from local sources. The Na-bentonite was firstly prepared before proceeding to cellulose embedment. The resultant B/Cell was characterized for its functional groups, morphology, and crystallinity. The Cr(VI) adsorption capacity and removal efficiency were determined based on batch adsorption. Our findings revealed that the B/Cell composite with a 4:1 bentonite-to-cellulose mass ratio exhibited the highest removal efficiency (85.68%) among tested formulations. Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction analyses confirmed the successful integration of cellulose and structural modification of bentonite. Optimal adsorption was achieved at pH 3, 180-min contact time, and 10 g/L adsorbent dosage. Isotherm modeling showed excellent fits for Sips (R2 = 0.9992) model, with maximum adsorption capacity reaching 192.56 mg/g. Kinetic analysis indicated pseudo-second-order kinetics (R2 = 0.959, qe = 1.018 mg/g), suggesting a chemisorption mechanism. These results highlight the potential of the B/Cell composite as an efficient and low-cost adsorbent for Cr(VI) removal from aqueous environments.

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2025-08-06

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[1]
J. Julinawati, E. Nadia, I. Mustafa, and S. Suryati, “Preparation and Characterization of Cellulose-clay Composite using Indonesian Natural Bentonite for Cr(VI) Adsorption”, J. Multidiscip. Appl. Nat. Sci., Aug. 2025.

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Copyright (c) 2025 Julinawati Julinawati, Eka Nadia, Irfan Mustafa, Suryati Suryati

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