Fe(III) cross-linked cellulose-agar hydrogel beads for efficient phosphate removal from aqueous solutions.
Environ Monit Assess
; 196(1): 54, 2023 Dec 18.
Article
em En
| MEDLINE
| ID: mdl-38110596
ABSTRACT
Fe(III) cross-linked cellulose agar beads (Fe-CLCAB) were synthesized by sol-gel method and employed as adsorbents for the removal of phosphate ions from aqueous medium. The synthesized Fe-CLCAB was characterized by its swelling property, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and UV-Vis absorption spectroscopic analysis. Batch adsorption studies were carried out to find out the optimum conditions of phosphate uptake. The adsorption process was found to fit both Langmuir and Freundlich adsorption isotherm model, pseudo-second-order kinetic model, and Elovich kinetic model. Ninety-four percent phosphate adsorption was achieved with 500 beads at pH 5. Maximum monolayer adsorption capacity was 73.13 mg/g. A two-step elution process using sodium chloride solution was suitable for complete desorption of phosphate from Fe-CLCAB. Six cyclic adsorption-desorption tests were conducted using a 0.1 M NaCl solution as desorbing agent. The removal efficiency of regenerated Fe-CLCAB was 42% of its original value after six cycles, which validates good stability and effectiveness of the prepared hydrogel beads. Ion exchange plays a vital role during adsorption/desorption of phosphate.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
12_ODS3_hazardous_contamination
/
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
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Celulose
Idioma:
En
Revista:
Environ Monit Assess
Ano de publicação:
2023
Tipo de documento:
Article