Removal of manganese (Mn2+) from water samples using a biocomposite sorbent.
Environ Res
; 257: 119353, 2024 Sep 15.
Article
en En
| MEDLINE
| ID: mdl-38844033
ABSTRACT
Herein, tannic acid-tethered cellulose was developed as an efficient and selective sorbent for Mn2⺠removal from aqueous solutions. The modified cellulose was characterized through scanning electron microscopy, infrared spectroscopy, and elemental analyses. Sorption performance was evaluated using various parameters, including pH, initial Mn2⺠concentration, contact time, and the presence of interfering ions. Results indicated that Mn2⺠removal was highly pH-dependent, with removal efficiency increasing from 8% at pH 2 to99% at pH 9, achieving a remarkable 99% removal rate within only 30 min, highlighting the rapidity of the cellulose sorption kinetics. The results of isotherm studies confirmed that the sorption conformed to the Langmuir model with a monolayer sorption mechanism. Using a sorbent dose of 0.05 g, 99% of Mn2⺠could be effectively eliminated from water, achieving a maximum sorption capacity of 32.2 mg/g dry-sorbent. The modified cellulose could be effectively regenerated using 0.5-M HCl or 0.1-M H2SO4, with no considerable deterioration in sorption performance after three sorption-regeneration cycles. The presence of Na⺠and K⺠had minimal impact on Mn2⺠removal, whereas the presence of Ca2⺠and Mg2⺠at low concentrations facilitated moderate-level Mn2⺠removal.
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1
Banco de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
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Celulosa
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Purificación del Agua
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Manganeso
Idioma:
En
Año:
2024
Tipo del documento:
Article