Sorption of uranium on magnetite nanoparticles

Das, D.; Sureshkumar, M.; Koley, Siddhartha; Mithal, N.; Pillai, C.G.S.

doi:10.1007/s10967-010-0627-0

Cited by 131 publications

(47 citation statements)

References 13 publications

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“…3a), the saturation sorption capacity (q max ) is determined and indicates that at pH 5.8, MNP-dAMD extracts up to 120 mg of uranium per gram (TABLE I). This value is higher than that obtained with magnetite nanoparticles either raw 16 or functionalized with quercetin. 17 The value of the Langmuir constant (K L ) is indicative of the good adsorption capacity.…”

Section: Resultscontrasting

confidence: 57%

Maghemite nanoparticles bearing di(amidoxime) groups for the extraction of uranium from wastewaters

et al. 2016

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Polyamidoximes (pAMD) are known to have strong affinities for uranyl cations. Grafting pAMD onto the surface of functionalized maghemite nanoparticles (MNP) leads to a nanomaterial with high capacities in the extraction of uranium from wastewaters by magnetic sedimentation. A diamidoxime (dAMD) specifically synthesized for this purpose showed a strong affinity for uranyl: Ka = 105 M-1 as determined by Isothermal Titration Calorimetry (nano-ITC). The dAMD was grafted onto the surface of MNP and the obtained sorbent (MNP-dAMD) was characterized. The nanohybrids were afterward incubated with different concentrations of uranyl and the solid phase recovered by magnetic separation. This latter was characterized by zeta-potential measurements, X-Ray Photoelectron Spectroscopy (XPS) and X-Ray Fluorescence spectroscopy (XRF), whereas the supernatant was analyzed by Inductively Coupled Plasma coupled to Mass Spectrometry (ICP-MS). All the data fitted the models of Langmuir, Freundlich and Temkin isotherms very well. These isotherms allowed us to evaluate the efficiency of the adsorption of uranium by MNP-dAMD. The saturation sorption capacity (qmax) was determined. It indicates that MNP-dAMD is able to extract up to 120 mg of uranium per gram of sorbent. Spherical aberration (Cs)-corrected High-Resolution Scanning Transmission Electron Microscopy (HRSTEM) confirmed these results and clearly showed that uranium is confined at the surface of the sorbent. Thus, MNP-dAMD presents a strong potential for the extraction of uranium from wastewaters.

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Section: Resultscontrasting

confidence: 57%

Maghemite nanoparticles bearing di(amidoxime) groups for the extraction of uranium from wastewaters

et al. 2016

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“…Therefore, magnetic nanoparticles (MNPs), especially Fe 3 O 4 , have attracted quite a lot of attentions because of the outstanding properties such as easy separation and low toxicity [14][15][16][17]. Das et al [18] have studied the sorption of uranium (VI) on magnetite (Fe 3 O 4 ) nanoparticles, but the sorption capacity is relatively low. To increase the adsorption capacity, surface modifications of MNPs based on covalent binding or physical coating has been widely explored.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Fe3O4@TiO2 core–shell magnetic composites for highly efficient sorption of uranium (VI)

Tan

Zhang

Liu

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

135

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“…However, the separation process of illite from aqueous solution after saturated sorption is usually troublesome and time-consuming. By this time, magnetically assisted chemical separation processes, an easy operation way for removing heavy metal from aqueous solution by applying an appropriate magnetic field [12][13][14][15], begins to be considered.…”

Section: Introductionmentioning

confidence: 99%

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

Yin

et al. 2015

J Radioanal Nucl Chem

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The sorption of U(VI) on magnetic illite as a function of pH, ionic strength, solid-to-liquid ratio, shaking time, humic acid (HA) and temperature was investigated through batch experiments. The results showed that the sorption process had a strong dependent on the changes of pH, temperature and HA in solution. And at below pH 6.5, with decreasing of the valences of anions such as Cl -, SO 2À 4 and PO 3À 4 ; the sorption amount increased obviously, but that was almost not influenced by cations. This experiment could provide some data base for the studies of actinide elements migration in geological media.

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Sorption of uranium on magnetite nanoparticles

Cited by 131 publications

References 13 publications

Maghemite nanoparticles bearing di(amidoxime) groups for the extraction of uranium from wastewaters

Maghemite nanoparticles bearing di(amidoxime) groups for the extraction of uranium from wastewaters

Synthesis of Fe3O4@TiO2 core–shell magnetic composites for highly efficient sorption of uranium (VI)

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

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