A new optical sensor for selective quantitation of uranium by the immobilization of arsenazo III on an agarose membrane

Serenjeh, Fariba Nazari; Hashemi, Payman; Ghiasvand, Alireza; Rasolzadeh, Fahimeh

doi:10.1039/c6ay00104a

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Arsenazo III as a dye was used in the assay. 39 The prepared solution showed a significant color change from purple to dark purple in the buffer solution with increasing UO 2 2+ concentration. Therefore, the change in UO 2…”

Section: Synthesis Of Ag-cdsementioning

confidence: 89%

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Ag-Doped CdSe Nanosheets as Photocatalysts for Uranium Reduction

Dong

Sun

et al. 2022

ACS Appl. Nano Mater.

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Doping is a simple method to modulate the electronic configuration of semiconductor photocatalysts. This study regulated the energy band structure of CdSe nanosheets by Ag doping, which reduced the energy bandwidth of CdSe nanosheets by increasing the carrier density, thereby improving the efficiency of the photocatalytic reduction of uranium by CdSe nanosheets. A 96% removal of U(VI) was achieved by 3% Ag-CdSe nanosheets, which was 1.9 and 1.2 times higher than that of pristine CdSe nanosheets (50%), and 1% Ag-CdSe nanosheets (81%), respectively. Additionally, at pH = 4.0 and a solid−liquid ratio of 0.25, the reduction of uranium by 3% Ag-CdSe nanosheets (765 mg/g) was 2.2 times higher than that of pristine CdSe nanosheets (345.6 mg/g). This study provides a new idea for other efficient photocatalysts designed for uranium reduction.

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Section: Synthesis Of Ag-cdsementioning

confidence: 89%

“…After photocatalysis, the reaction solution was filtered to remove the catalyst and mixed with azoarsine III, water, and buffer solution. Arsenazo III as a dye was used in the assay . The prepared solution showed a significant color change from purple to dark purple in the buffer solution with increasing UO 2 2+ concentration.…”

Section: Methodsmentioning

confidence: 99%

Ag-Doped CdSe Nanosheets as Photocatalysts for Uranium Reduction

Dong

Sun

et al. 2022

ACS Appl. Nano Mater.

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“…U(VI) adsorption capacity (mg g −1 ) and adsorption rate (%) were calculated by the formula (2.1) and formula (2.2), respectively [ 18 ]. The concentration of U(VI) was determined by ArsenazoIII spectroscopic method [ 19 ].

and

where C 0 and C e were the initial and equilibrium concentrations of U(VI), respectively.…”

Section: Methodsmentioning

confidence: 99%

U(VI) adsorption in water by sodium alginate modified Bacillus megaterium

Yang

Zhang

et al. 2021

R. Soc. open sci.

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The surface of Bacillus megaterium was modified by coating sodium alginate. The modified B. megaterium before and after adsorption were characterized by SEM, FTIR and XPS. The effects of pH, reaction time, initial U(VI) concentration and adsorbent dosage on the adsorption of U(VI) by the modified B. megaterium were studied by batch adsorption experiments. The adsorption process was studied by pseudo-first-order kinetics and pseudo-second-order kinetic models, Langmuir and Freundlich isotherms. The results showed that the maximum adsorption capacity of U(VI) was 74.61 mg g −1 under the conditions of pH 5.0, adsorbent 0.2 g l −1 , 30°C and initial U(VI) concentration of 15 mg l −1 . The adsorption process accords with pseudo-first-order kinetics and Langmuir isotherm. The adsorption capacity of U(VI) by the modified B. megaterium was still higher than 80% after five times of desorption and reuse experiments. In conclusion, the sodium alginate modified B. megaterium was an ideal material for U(VI) biosorption.

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Optical Materials for Sensing Radioactive Elements

Singhal

2023

Indian Institute of Metals Series

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A new optical sensor for selective quantitation of uranium by the immobilization of arsenazo III on an agarose membrane

Abstract: A highly selective optical sensor was introduced for the determination of UO22+ through the chemical immobilization of arsenazo III on a transparent agarose membrane.

Cited by 7 publications

References 18 publications

Ag-Doped CdSe Nanosheets as Photocatalysts for Uranium Reduction

Ag-Doped CdSe Nanosheets as Photocatalysts for Uranium Reduction

U(VI) adsorption in water by sodium alginate modified Bacillus megaterium

Optical Materials for Sensing Radioactive Elements

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