Solid-phase extraction–spectrophotometric determination of uranium(VI) in natural waters

Sadeghi, Susan; Mohammadzadeh, Darush; Yamini, Yadollah

doi:10.1007/s00216-003-1762-z

Cited by 56 publications

(23 citation statements)

References 31 publications

(32 reference statements)

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“…Also, the obtained LOD is comparable with that obtained by modified silica gel, 49 modified activated carbon 50 and ion imprinted polymer. 51 The linear range obtained by the proposed method is wider or better than those obtained by modified C18, 47 modified Amberlite XAD-4 52 and modified naphthalene. 53 In comparison with Amberlite XAD with the same LOD, SBA/EnSA has higher capacity.…”

Section: Comparison Of the Proposed Methods With Other Methodsmentioning

confidence: 85%

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Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

et al. 2017

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A solid-phase extraction based on a functionalized SBA-15, with the Schiff base ligand, ethylenediaminepropylesalicylaldimine (SBA/EnSA), was developed for the recovery and preconcentration of trace amounts of uranium(VI) in water samples, prior to its determination spectrophotometrically using ArsenazoIII. For optimizing the parameters affecting the adsorption step (pH, adsorbent dose and adsorption time) and those influencing the desorption process (concentration and volume of eluent and desorption time), a statistical technique response surface methodology (RSM) was employed. The limit of detection and the linear dynamic range for the proposed method were 10 μg L -1 , and 33.5 -500 μg L -1 , respectively. The adsorbent showed a high capacity (110.2 mg g -1 ) and the method allowed obtaining a preconcentration factor of 67. The inter-and intra-day relative standard deviations for a solution of 100 μg L -1 (n = 5) were found to be 4.8 -6.2%. The developed method was successfully applied for the determination of U(VI) in water samples.

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Section: Comparison Of the Proposed Methods With Other Methodsmentioning

confidence: 85%

“…These ions can form complexes with the complexing reagent Arsenazo III; thus they have an interfering effect for the uranyl determination. A solution of EDTA (0.007 mol L -1 ) at the concentration of 10 and 50 times higher than of uranium 47,48 was successfully used as a masking agent for these interfering ions, respectively.…”

Section: Interference Studymentioning

confidence: 99%

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

et al. 2017

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“…Above this concentration, the study of uranyl(VI) hydrolysis is complicated due to the formation of polymeric species such as (UO 2 ) 2 (OH 2 ) 2 2+ , (UO 2 ) 3 (OH) 4 2+ and (UO 2 ) 3 (OH) 5 + . Several methods are utilised to extract uranium from wastewaters and process effluents, which include electromembrane extraction (Davarani et al, 2013), liquid-liquid extraction (Popov, 2012;Yang et al, 2002), solid phase extraction (Sadeghi et al, 2003) and ion exchange (Tavakoli et al, 2013). However, most of these techniques are both costly and ineffective, particularly when the concentration of uranium is very low (Blázquez et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of bulk ion-imprinted polymers (IIPs) embedded with oleic acid coated Fe<sub>3</sub>O<sub>4</sub> for selective extraction of hexavalent uranium

Tavengwa¹,

Cukrowska²,

Chimuka³

2014

WSA

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A selective and reliable method for the extraction of trace quantities of U(VI) by the use of a magnetic U(VI) ion-imprinted polymer (IIP) was developed. In this study, oleic acid (OA) coated magnetite nano-particles were incorporated into the cross-linked polymeric matrix of the selective sorbent, in order to gain the physical advantages of separating the polymers. Many physico-chemical factors influence the adsorption process; uranyl ion uptake ability based on these parameters was investigated. The optimum parameters obtained were sample pH 4, 50 mg of the magnetic polymer, a contact time of 45 min and an initial U(VI) concentration of 2 mg·ℓ , respectively. The adsorption behaviour of U(VI) in the presence of other competing metal ions onto the cross-linked magnetic polymers was also examined in binary mixtures and the order of selectivity was found to be U(VI) > Pb(VI) > Ni(II). The resulting magnetic nano-composite polymers were found to be stable up to the sixth cycle of use and reuse. The Freundlich adsorption model was used for the mathematical description of the adsorption equilibrium and the adsorption kinetic data fitted the pseudo-first-order model with R 2 > 0.92.

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“…1,2 The literature citation revealed that there are various analytical techniques for the estimation of uranium which include thin layer chromatography, 3 gravimetry, 4 titrimetry, 5 fluorimetry, 6,7 potentiometry, 8 polarography, 9 X-ray fluorescence, 10 inductively coupled plasma mass spectrometry. 11 In addition, spectrophotometric methods have also been employed to determine U(VI) in presence of thorium(IV), 12 ore leachates, 13 natural waters, [14][15][16] process streams of a uranium extraction plant 17 and soil. 18 Moreover, the gravimetric method generally requires the prior separation of interfering elements whereas multiple steps are involved in the titrimetric method.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of U(VI) with Rifampicin in Soil Samples

Lutfullah

Sharma

Rahmana

et al. 2011

J Chinese Chemical Soc

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A validated spectrophotometric method has been developed for the determination of uranyl ion in soil samples. The method is based on the complexation reaction between uranyl ion and rifampicin in methanol-water medium at room temperature. The method is followed spectrophotometrically by measuring the absorbance at 375 nm. Under the optimized experimental conditions, Beer's law is obeyed in the concentration range of 1.35-20.25 mg mL -1 with apparent molar absorptivity and Sandell's sensitivity of 8.0 × 10 3 L mol -1 cm -1 and 0.042 mg/cm 2 /0.001 absorbance unit, respectively. The interference of a large number of anions and cations has been investigated and the optimized conditions developed have been utilized for the determination of uranium(VI) in soil samples. The three sigma detection limit (n = 9) for uranyl ion was found to be 0.20 mg mL -1 . The proposed method was successfully applied to the determination of uranyl ion in soil samples.

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Solid-phase extraction–spectrophotometric determination of uranium(VI) in natural waters

Cited by 56 publications

References 31 publications

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

Synthesis of bulk ion-imprinted polymers (IIPs) embedded with oleic acid coated Fe<sub>3</sub>O<sub>4</sub> for selective extraction of hexavalent uranium

Spectrophotometric Determination of U(VI) with Rifampicin in Soil Samples

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