| 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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