Biosorption of uranyl ions from aqueous solutions by soluble renewable polysaccharides

Levy-Ontman, Oshrat; Paz-Tal, Ofra; Alfi, Yaron; Wolfson, Adi

doi:10.1039/d3ra05794a

RSC Adv.

2023

DOI: 10.1039/d3ra05794a

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Biosorption of uranyl ions from aqueous solutions by soluble renewable polysaccharides

Oshrat Levy-Ontman,

Ofra Paz-Tal,

Yaron Alfi

et al.

Abstract: Polysaccharides derived from natural sources have been offered as environment friendly sorbents for the adsorption of uranyl ions.

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Cited by 3 publications

References 66 publications

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Selective and efficient removal of phosphate from aqueous solution using activated carbon‐supported Mg–Fe layered double oxide nanocomposites

Bezza,

Brink,

Chirwa

2024

Can J Chem Eng

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In the face of the continuous development of novel adsorbents, developing robust adsorbents with high efficiency, strong phosphate selectivity, high regenerability, and cost effectiveness is a scientific challenge. In the present study, an activated carbon‐supported MgFe2O4‐layered double hydroxide (AC@ MgFe2O4‐LDH) derived Mg–Fe layered double oxide (AC@ MgFe2O4‐LDO) nanocomposite was synthesized at various temperatures and its potential application for phosphate adsorption was investigated. The nanocomposite exhibited a hierarchical mesoporous structure with a Brunauer–Emmett–Teller (BET) specific surface area of 193 m2/g and a narrow per‐size distribution of ~2 nm. AC@MgFe2O4‐LDO exhibited a high point of zero charge (pHpzc) value of 9.8 and robust phosphate adsorption potential over a wide pH range of 4–9 due to its high pH buffering capacity. The effects of adsorbent dose, layered double hydroxides (LDH) calcination temperature, initial phosphate concentration, contact time, and temperature on the phosphate adsorption capacity of the adsorbent were investigated. In the present study, up to 99.0% removal of phosphate was achieved at a 4 g/L adsorbent dosage in 4 h at pH 7 and 30°C. An adsorption kinetics study revealed that the adsorption of phosphate by AC@MgFe2O4‐LDO reached equilibrium within 240 min, with the kinetic experimental data fitting well with pseudo‐first‐order kinetics (r2 >0.99). The Langmuir adsorption isotherm model fit the experimental data well, with a maximum adsorption capacity of 25.81 mg/g. The adsorbent displayed strong phosphate selectivity in the presence of competing anions, and the study demonstrated that AC@MgFe2O4‐LDO has promising potential for efficient phosphate adsorption over a wide pH range.

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Selective and efficient removal of phosphate from aqueous solution using activated carbon‐supported Mg–Fe layered double oxide nanocomposites

Bezza,

Brink,

Chirwa

2024

Can J Chem Eng

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Utilizing phytochemical-rich spent coffee ground extract for eco-friendly ZnO electrochemical synthesis: Assessing photocatalytic efficacy in 2,4-dichlorophenol degradation

Mutalib,

Jaafar,

Miskam

et al. 2025

Separation and Purification Technology

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Selective Sorption of Heavy Metals by Renewable Polysaccharides

Levy-Ontman,

Yanay,

Alfi

et al. 2023

Polymers

Self Cite

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Renewable and biodegradable polysaccharides have attracted interest for their wide applicability, among them their use as sorbents for heavy metal ions. Their high sorption capacity is due mainly to the acidic groups that populate the polysaccharide backbone, for example, carboxylic groups in alginate and sulfate ester groups in the iota and lambda carrageenans. In this study, these three polysaccharides were employed, alone or in different mixtures, to recover different heavy metal ions from aqueous solutions. All three polysaccharides were capable of adsorbing Eu3+, Sm3+, Er3+, or UO22+ and their mixtures, findings that were also confirmed using XPS, TGA, and FTIR analyses. In addition, the highest sorption yields of all the metal ions were obtained using alginate, alone or in mixtures. While the alginate with carboxylic and hydroxyl groups adsorbed different ions with the same selectivity, carrageenans with sulfate ester and hydroxyl groups exhibited higher adsorption selectivity for lanthanides than for uranyl, indicating that the activity of the sulfate ester groups toward trivalent and smaller ions was higher.

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Biosorption of uranyl ions from aqueous solutions by soluble renewable polysaccharides

Abstract: Polysaccharides derived from natural sources have been offered as environment friendly sorbents for the adsorption of uranyl ions.

Cited by 3 publications

References 66 publications

Selective and efficient removal of phosphate from aqueous solution using activated carbon‐supported Mg–Fe layered double oxide nanocomposites

Selective and efficient removal of phosphate from aqueous solution using activated carbon‐supported Mg–Fe layered double oxide nanocomposites

Utilizing phytochemical-rich spent coffee ground extract for eco-friendly ZnO electrochemical synthesis: Assessing photocatalytic efficacy in 2,4-dichlorophenol degradation

Selective Sorption of Heavy Metals by Renewable Polysaccharides

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