Borosilicate glasses modified with organic ligands: A new selective approach for the removal of uranyl ion

Ramkumar, Jayshree; Chandramouleeswaran, S.; Sudarsan, V.; Mishra, R.; Kaushik, C.P.; Raj, Kanwar; Mukherjee, Tulsi; Tyagi, A. K.

doi:10.1016/j.jhazmat.2007.10.054

Cited by 15 publications

(4 citation statements)

References 28 publications

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“…Effect of pH pH is a determinant factor in adsorption of Cr(III), Cd 2+ and Pb 2+ ions from aqueous solutions (Li and Wang, 2009;Ramkumar et al, 2008). To study the effect of pH on adsorption capacity of graphene oxide, pH of the solution was tested in the ranges of 2-6 for Cd 2+ and Pb 2+ and 2-4.5 for Cr(III).…”

Section: Effect Of the Variables On Responsesmentioning

confidence: 99%

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Rouniasi¹,

Monavvari²,

Abdoli³

et al. 2018

Appl. Ecol. Env. Res.

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Water pollution due to heavy metals has become a critical problem worldwide. In this study, the removal of chromium(III), cadmium and lead by graphene oxide adsorbent was examined. Graphene oxide nanosheets were synthesized through Hummer's method, and their characteristics were examined using FTIR, XRD, and SEM. The effect of independent variables, pH, contact time and initial concentration of solution on the removal efficiency of Cr(III), Cd 2+ and Pb 2+ was evaluated according to the experimental Box-Behnken Design using response surface methodology (RSM). Applying quadratic model, the adsorption rate of Cd 2+ and Pb 2+ was obtained as 99% and the adsorption rate of Cr(III) was obtained as 98%. ANOVA was applied as statistical analysis of responses. According to FESEM images, the average size of graphene oxide sheets was 1 to 3 µm. After optimization by RSM, adsorption capacities of Cr(III), Pb 2+ and Cd 2+ were found to be 38 mg/g, 136 mg/g and 68 mg/g, respectively. Examination of isotherms suggested that Cd 2+ and Cr(III) adsorptions follow Langmuir, and Pb 2+ adsorption follows Freundlich isotherm. The results showed that graphene oxide has a good effect on removing Cr(III), Cd 2+ and Pb 2+ ions from aqueous solutions. pH of the solution and initial concentration of the contaminant had the highest effect on adsorption of the mentioned heavy metals. The results of RSM analysis showed that the obtained data were in agreement with the predicted model.

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Section: Effect Of the Variables On Responsesmentioning

confidence: 99%

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Rouniasi¹,

Monavvari²,

Abdoli³

et al. 2018

Appl. Ecol. Env. Res.

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“…27 It is proposed that the lone pairs of electrons of the amino nitrogen atom and the oxime oxygen atom can be donated to the positive metal center to form a stable chelate. 28,29 For uranium sorption, the amidoxime group has been widely used to functionalize many kinds of materials, such as carbon nanotubes, 30 graphene, 31 silica, 32 mesoporous carbon, 26 hydrogel, 33 and various polymers. [34][35][36] However, the interaction between the amidoxime group and uranium has not been fully explored, and the proposed interaction mechanism lacks experimental verification.…”

Section: Introductionmentioning

confidence: 99%

Amidoxime functionalization of mesoporous silica and its high removal of U(vi)

Zhao

Wang

et al. 2015

Polym. Chem.

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“…Uranium exists commonly in the uranyl form (UO 2 2+ ) in aqueous media and has high stability in natural environments [7]. In this context, many studies have been carried out to A c c e p t e d M a n u s c r i p t prevent its contamination into water using arene-based magnetite nano-particles [8], organic ligands, material modified organic ligands [9][10][11] and new functionalized polymer structures [12].…”

Section: Introductionmentioning

confidence: 99%

Dioxouranium(VI) complexes with N₂O₂ chelating thiosemicarbazones [UO₂L(R-OH)]

Şahın

Bal‐Demirci

Özdemir

et al. 2013

Journal of Coordination Chemistry

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Three alkylated thiosemicarbazones (1-3) substituted on sulfur were synthesized using 5-bromosalicylaldehyde as starting material. The template reactions of the S-alkylthiosemicarbazones in the presence of dioxouranium(VI) were investigated. Six dioxouranium(VI) (1a-3b) complexes were synthesized. Propyl or allyl alcohol used as second ligand completed the seventh coordination site of UO 2 2+ . The synthesized thiosemicarbazones and template complexes were characterized by elemental analysis, UV-visible, FTIR and 1 H-NMR. The structure of the dioxouranium(VI) complex, [UO 2 L(allylalcohol)], was studied by single-crystal diffraction. The uranium is seven-coordinate in a pentagonal-bipyramidal arrangement with two oxo groups occupying the apical positions.

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Borosilicate glasses modified with organic ligands: A new selective approach for the removal of uranyl ion

Cited by 15 publications

References 28 publications

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Amidoxime functionalization of mesoporous silica and its high removal of U(vi)

Dioxouranium(VI) complexes with N₂O₂ chelating thiosemicarbazones [UO₂L(R-OH)]

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Borosilicate glasses modified with organic ligands: A new selective approach for the removal of uranyl ion

Cited by 15 publications

References 28 publications

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Optimization Process for the Removal of Heavy Metals From Aqueous Solution Using Graphene Oxide Nanosheets and Response Surface Methodology

Amidoxime functionalization of mesoporous silica and its high removal of U(vi)

Dioxouranium(VI) complexes with N2O2 chelating thiosemicarbazones [UO2L(R-OH)]

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Product

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Dioxouranium(VI) complexes with N₂O₂ chelating thiosemicarbazones [UO₂L(R-OH)]