Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

Nilchi, A.; Dehaghan, T. Shariati; Garmarodi, S. Rasouli

doi:10.1007/s10967-012-2252-6

Cited by 20 publications

(7 citation statements)

References 13 publications

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“…By discharging the effluents from textile industries and nuclear power plants, the production of electrical cables, batteries, ores, steel and electrical TVs, the wastewater is contaminated by heavy metals, dyes and radioactive elements [41][42][43]. Heavy metals are toxic for living organisms and they show the properties of bioaccumulation and non-biodegradability [44][45][46].…”

Section: Removal Of Pollutants By Adsorptionmentioning

confidence: 99%

The application of hydrogels based on N-isopropylacrylamide and anionic comonomers

Zdravkovic¹,

Nikolic²,

Ilić‐Stojanović³

et al. 2017

Adv techn

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Hydrogels represent three-dimensional networks of polymer chains that have the ability of absorption of a significant amount of water or biological fluid. A special group of hydrogels are copolymers which respond to changes of pH values and temperature. Desirable characteristics of temperature-and pH-sensitive hydrogels based on N-isopropylacrylamide and anionic comonomers for different applications, from pharmaceutical to the environmental one, can be designed by composition of copolymers. The presence of the amide and carboxyl group in the structure of these hydrogels enables their application as adsorbents in the processes of removing the pollutants from aqueous solutions. Hydrogels based on N-isopropylacrylamide and anionic comonomers represent desirable three-dimensional matrices for controlled and sustained release of agrochemicals and drugs in relation to temperature and pH of the surrounding medium. Hydrogels, as separation devices, perform the concentrating of compounds or microorganisms solutions by absorption of greater amounts of water. One more application of these copolymers is for immobilization of enzymes.

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Section: Removal Of Pollutants By Adsorptionmentioning

confidence: 99%

The application of hydrogels based on N-isopropylacrylamide and anionic comonomers

Zdravkovic¹,

Nikolic²,

Ilić‐Stojanović³

et al. 2017

Adv techn

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“…Therefore, a separation and preconcentration step is commonly applied before instrumental analysis. 1,[6][7][8][9] Preconcentration/ separation techniques, such as solid phase extraction (SPE), 3,[10][11][12][13] liquid-liquid microextraction (LLME), 14 and cloud point extraction (CPE) [15][16][17] are used for the determination of uranium in various samples. SPE has commonly been used as a technique for preconcentration/separation due to its higher enrichment factor and practicality.…”

Section: Introductionmentioning

confidence: 99%

Solid-Phase Extraction Method by Magnetic Nanoparticles Functionalized with Murexide for Trace U(VI) from Sea Water Prior to Spectrophotometric Determination

Oymak

2019

ACSi

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In this study, magnetic nanoparticles (Fe 3 O 4 /SiO 2 /APTES) functionalized with murexide were used for the determination of uranium(VI) in sea water by spectrophotometric method in perchloric acid medium using Arsenazo-III as chromogenic reagent. The effects of some analytical parameters, such as pH, contact time, and eluent volume, on the recovery of uranium(VI) were examined in synthetic sea water. The optimum conditions were achieved with a 15 min adsorption time and 2 min elution time with 1 mL of 5 mol L-1 HClO 4 at pH of 6.5 and 25 mg of the magnetic sorbent. The linear range, detection limit, and precision (as RSD%) of the method were found to be 0.02-4.0 mg L-1 , 0.001 mg L-1 and 3.0%, respectively. The proposed method is simple, rapid, and cost-effective for the determination of U(VI) in sea water, with a total analysis time of approximately 30 min. The adsorption isotherm was well fitted to the Langmuir model, with a correlation coefficient of 0.9997 and Q max value was found to be 77.51 mg g-1. The magnetic sorbent was successfully used for the rapid determination of trace quantities of U(VI) ions in different sea waters, and satisfactory results were obtained.

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“…Many separation and enrichment techniques including solid phase extraction with Quinoline-8-ol modified cellulose [7], adsorption on MnO 2 impregnated filter cartridges [8], coprecipitation with MnO 2 [9], solvent extraction [10], ion exchange [11] membrane treatment [12], electrodeposition [13] and molecularly imprinting [14] have been used for thorium. Solid phase extraction is one of the significant preconcentration-separation methods for trace heavy metal ions, due to its simplicity, flexibility, low-cost and being environmentally friendly [15].…”

Section: Introductionmentioning

confidence: 99%

Tetraphenylimidodiphosphinate as solid phase extractant for preconcentrative separation of thorium from aqueous solution

Liu

Wang

Chu-hua

2015

J Radioanal Nucl Chem

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A simple and reliable method for solid phase extraction of thorium using tetraphenylimidodiphosphinate is presented. The solid phase extraction process was optimized at equilibrium time 3 h, pH = 4.5, initial concentration 30 mg L -1 and extractant dosage 0.01 g with 98.95 % of removal efficiency and 29.68 mg g -1 of adsorption capacity. The interfering ions experiments indicated that it had almost no effect on thorium adsorption. Kinetics data follow the pseudo-first-order model and equilibrium data agreed with the Langmuir isotherm model very well. FT-IR analysis indicated that imino group and phosphoryl acted as the significant roles in the solid phase extraction process.

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Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

Cited by 20 publications

References 13 publications

The application of hydrogels based on N-isopropylacrylamide and anionic comonomers

The application of hydrogels based on N-isopropylacrylamide and anionic comonomers

Solid-Phase Extraction Method by Magnetic Nanoparticles Functionalized with Murexide for Trace U(VI) from Sea Water Prior to Spectrophotometric Determination

Tetraphenylimidodiphosphinate as solid phase extractant for preconcentrative separation of thorium from aqueous solution

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