Fixed-Bed Adsorption of Lead from Aqueous Solution Using Chitosan-Coated Bentonite

doi:10.3390/ijerph19052597

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Title:	Fixed-Bed Adsorption of Lead from Aqueous Solution Using Chitosan-Coated Bentonite
Authors:	Futalan, Cybelle Morales Wan, Meng-Wei
Contributors:	University of the Philippines System University of the Philippines Open University University of the Philippines Los Banos Department of Environmental Engineering and Science, Chia Nan University of Pharmacy & Science
Keywords:	competitive adsorption heavy-metals packed-bed ii ions removal batch column water biosorption phosphate
Date:	2022
Issue Date:	2023-12-11 13:59:41 (UTC+8)
Publisher:	MDPI
Abstract:	In this study, fixed-bed adsorption of Pb(II) from an aqueous solution using chitosan-coated bentonite (CCB) was investigated. Characterization of CCB was performed using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The effects of varying bed height (1.3 to 4.3 cm), flow rate (0.20 to 0.60 mL/min), and initial concentration (500 to 1500 mg/L) on the length of mass transfer zone (Z(m)) and adsorption capacity at breakthrough (q(b)) and exhaustion (q(e)) were examined. Low flow rate and high bed height were determined to cause a longer time to reach breakthrough and exhaustion. Meanwhile, the fixed-bed system was observed to quickly attain breakthrough and exhaustion under high initial concentrations. Kinetic column models such as the Thomas, Yoon-Nelson, and Clark models were used to predict the breakthrough curves. High R-2 values (0.9758 <= R-2 <= 0.8087) were attained for the Thomas model, which indicates that there is good agreement between experimental data and linear plots generated by the Thomas model. Moreover, the Thomas model is best in describing the breakthrough curves of Pb(II) removal under a fixed-bed system.
Relation:	International Journal of Environmental Research and Public Health, v.19, n.5, Article 2597
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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