Adsorption of uranium from aqueous solution using chitosan-tripolyphosphate (CTPP) beads

Sureshkumar, M.; Das, D.; Mallia, Madhava B.; Gupta, Pratishtha

doi:10.1016/j.jhazmat.2010.07.119

Cited by 262 publications

(78 citation statements)

References 33 publications

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“…The observed behavior is probably due to the decrease in the hydration effects of water, the increase of the entropy effects of ions in solution, and, consequently, a greater mobility of the uranyl ions as concentration is increased. In addition, when more U(VI) ions are present in the solution, a higher fraction of available active sites takes part in the sorption process [33]. This could be attributed to the associated limitation in the number of water molecules available for hydration of the exposed hydrophilic groups at the fiber surface.…”

Section: Effect Of Initial Concentrationmentioning

confidence: 99%

Synthesis of amidoximated polyacrylonitrile fibers and its application for sorption of aqueous uranyl ions under continuous flow

Horzum

Shahwan

Parlak

et al. 2012

Chemical Engineering Journal

110

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Section: Effect Of Initial Concentrationmentioning

confidence: 99%

Synthesis of amidoximated polyacrylonitrile fibers and its application for sorption of aqueous uranyl ions under continuous flow

Horzum

Shahwan

Parlak

et al. 2012

Chemical Engineering Journal

110

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“…This can verify that the crosslinking took place through the ionic interaction between the negatively charged -P-O− moieties of the phosphate group and protonated NH 3 + moieties of the chitosan molecule [26].…”

Section: Resultsmentioning

confidence: 67%

Highly Monodisperse Chitosan Nanoparticles Prepared by a Combined Triple-Method for Potential Use as Drug Carriers

Sadeghi¹

2017

Int J Nanomater Nanotechnol Nanomed

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Chitosan (CS) as a biodegradable polymer with unique bio-attachment properties that makes it favorable to be used in biomedical applications. Insolubility in water is the problem with use of CS. The purpose of this study was to prepare low molecular weight, water-soluble CS nanoparticles that exhibit excellent water solubility and biological, chemical, and physical functions. Oxidative degradation technique using hydrogen peroxide (H 2 O 2 ) was used to decrease chitosan molecular weight. Then ultrasonication and ionic gelation method using sodium tripolyphosphate (TPP) were used to prepare CS nanoparticles. Molecular weight of chitosan determined by Ubbelohde viscometry and it decreased by approximately 100%. From the spectral information (FTIR) it was observed that the cross-linking between CS and TPP was taking place while the main structure of chitosan was the same. The dynamic light scattering results showed that water-soluble nanoparticles had a multimodal size distribution pattern, while low molecular particles yielded monodisperse particle distribution with an average size of ~45 nm, which was directly ascribed to the role of ultrasonication process. The morphology of nanoparticles was observed by SEM and TEM techniques. The mean diameter of nanoparticles was obtained in a range of 30 nm to 45 nm with a narrow size distribution and polydispersity index smaller than 0.2. Cytotoxicity of CS nanoparticles on human umbilical valve endothelial cells (HUVEC) was assessed by CCK-8 assay, as well as "Live/ Dead" assay and subsequent fl uorescent imaging. The results showed no to minimal cytotoxicity for CS solutions up to 50 μg/ml, while sporadic dead cells observed for 100 μg/ml solutions. This suggested that our monodisperse nanoparticle systems are great candidates to be used for drug delivery systems.

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“…Above all, HCC-TPP presents a novel, promising and feasible alternative adsorbent for uranium removal compared with other reported adsorbents [8,[41][42][43][44][45][46][47][48][49][50][51], as showed in Table 5. Although direct comparison of HCC-TPP with other adsorbents is very difficult owing to different experimental conditions, it could be concluded that U(VI) sorption capacity of HCC-TPP is superior to polyacrylamide-bentonite, diethylenetriamine-modified magnetic chitosan resins and thermally activated sodium feldspar.…”

Section: U(vi) Sorption Capacity Comparison Of Hcc-tpp With Other Absmentioning

confidence: 99%

Removal of U(VI) from aqueous media by hydrothermal cross-linking chitosan with phosphate group

Dong

Qiu

Dai

et al. 2016

J Radioanal Nucl Chem

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For the selective adsorption of U(VI) from aqueous solutions, the hydrothermal cross-linking chitosan (HCC) and its phosphorylation production (HCC-TPP) were synthesized by hydrothermal reaction. The monolayer maximum capacity of HCC-TPP was improved from 200 mg g -1 of HCC to 409.2 mg g -1 at 298 K. Calculated thermodynamic parameters showed endothermic property of the adsorption process, while kinetic parameters indicated that the interaction followed pseudo-second kinetic model. Selective separation of U(VI) from effluent by HCC-TPP was achieved.

show abstract

Adsorption of uranium from aqueous solution using chitosan-tripolyphosphate (CTPP) beads

Cited by 262 publications

References 33 publications

Synthesis of amidoximated polyacrylonitrile fibers and its application for sorption of aqueous uranyl ions under continuous flow

Synthesis of amidoximated polyacrylonitrile fibers and its application for sorption of aqueous uranyl ions under continuous flow

Highly Monodisperse Chitosan Nanoparticles Prepared by a Combined Triple-Method for Potential Use as Drug Carriers

Removal of U(VI) from aqueous media by hydrothermal cross-linking chitosan with phosphate group

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