Chemically bound Prussian blue in sodium alginate hydrogel for enhanced removal of Cs ions

Cho, Eunbee; Kim, Jong‐Ho; Park, Chan Woo; Lee, Kune-Woo; Lee, Taek Seung

doi:10.1016/j.jhazmat.2018.08.031

Cited by 84 publications

(9 citation statements)

References 30 publications

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“…The Langmuir isotherm suggests that molecules are adsorbed with a monolayer coverage of the surface of adsorbents, which means that adsorption occurs at specific sites on the surface of adsorbents [35]. The Freundlich isotherm model provides the information on adsorption behavior that occurs with the multilayer coverage of the molecules onto the surface of adsorbents [36]. The Langmuir (Equation (5)) and Freundlich isotherm equations (Equation (6)) are expressed as below:Ceqe=1bqnormalmnormalanormalx+Ceqnormalmnormalanormalx logfalse(qefalse)=log(KF)+1nlog(Ce) where C e (mmol/L) and q e (mmol/g) are the equilibrium concentration of EDTA and the adsorption capacity at equilibrium.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions

et al. 2019

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Because of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially available, gel-type, anion-exchange resins (AERs), which are based on cross-linked polystyrene with positive tertiary amine groups. Because of the positive charge on AERs, they could adsorb EDTA effectively even in a solution mixed with ions of cesium (Cs) via electrostatic attraction. Because EDTA adsorption by cation-exchange resins (CERs) was not possible, it was concluded that the negative charges on CERs do not contribute to the interaction with EDTA. The maximum adsorption capacity (qmax) of AER (2 g/L) for EDTA removal, calculated by the Langmuir isotherm model was 0.47 mmol/g for initial EDTA concentrations in the range of 0.01–1 mM in the EDTA/Cs mixed solution. The Langmuir isotherm model was found to be suitable for EDTA adsorption on AERs, indicative of monolayer adsorption. The results clearly suggested that the AERs could efficiently remove EDTA, regardless of the presence of nuclides, such as Cs ions in the aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions

et al. 2019

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“…To the best of our knowledge, aerogels obtained by freeze-drying are used as appealing adsorption materials 88–90 or in the encapsulation of bioactive molecules 91–93 due to their large structural porosity and surface area as well as abundant functional groups. These structural advantages are also suitable for the preparation of lightweight EMW absorbing materials, where the abundant functional groups not only improve the affinity for binding with various multivalent metal ions and dyes 94–96 but also enable multicomponent materials that can improve the EM loss to a uniform distribution within the absorption system rather than being precipitated, 87 by means of crosslinking (covalent bondings, hydrogen bondings, and van der Waals forces).…”

Section: Marine Polysaccharide-based Emw Absorbing Materialsmentioning

confidence: 99%

Marine polysaccharide-based electromagnetic absorbing/shielding materials: design principles, structure, and properties

Wang

Xiao

et al. 2022

J. Mater. Chem. A

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“…Alginic acid (AA) in its sodium salt form ( COONa) or sodium alginate (SA) is soluble in water. 43 SA has the extraordinary properties of biodegradability, nontoxicity and satisfactory metal and dye adsorption capacities 6,41,[44][45][46] ; hence, it is attractive for use as a WSP in PEUF. Therefore, in a previous investigation, we investigated the electrochemical reduction of Cr(VI) to Cr(III) in the presence of SA and the subsequent removal of the produced Cr(III)-SA by PEUF.…”

Section: Introductionmentioning

confidence: 99%

Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

Oyarce

Santander

Butter

et al. 2021

J of Applied Polymer Sci

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In this study, the removal of methylene blue (MB) cationic dye from an aqueous solution was investigated using the polymer-enhanced ultrafiltration (PEUF) technique with sodium alginate (SA) as an extracting soluble polymer, in combination with an ultrafiltration membrane of regenerated cellulose with a 10 kDa molar mass cut-off. SA was characterized via Fourier-transform infrared spectroscopy and thermogravimetric analysis. For ultrafiltration studies, the washing method was used to evaluate various experimental variables, such as the pH, SA dose and initial MB concentration, and adsorption isotherms to identify the optimal adsorption conditions. Finally, the regeneration of the SA polymer was evaluated in five consecutive cycles of adsorption-desorption of MB. In the obtained characterization results, the structural composition of SA and the characteristic thermal stability of the polymer were verified. The PEUF results demonstrated that a retention capacity of 98% of the MB was realized at pH 8.0 using 0.025 g of SA at an initial optimal MB concentration of 50 mg L −1 . It is possible to observe that the Freundlich model better explain the interaction between the dye and the polymer surface. According to the results is demonstrated the regeneration capacity of the polymer and its subsequent reuse.

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Chemically bound Prussian blue in sodium alginate hydrogel for enhanced removal of Cs ions

Cited by 84 publications

References 30 publications

Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions

Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions

Marine polysaccharide-based electromagnetic absorbing/shielding materials: design principles, structure, and properties

Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

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