New Iron Oxide Nanoparticles Catechol-Grafted with Bis(amidoxime)s for Uranium(VI) Depletion of Aqueous Solution

Eva Mazarío; Jérémy Stemper; Ahmed Sami Helal; Alvaro Mayoral; Philippe Decorse; Rémi Losno; Claude Lion; Souad Ammar; Thierry Le Gall; Miryana Hemadi

doi:10.1166/jnn.2019.16804

Journal articles

New Iron Oxide Nanoparticles Catechol-Grafted with Bis(amidoxime)s for Uranium(VI) Depletion of Aqueous Solution

Eva Mazarío ¹ Jérémy Stemper ² Ahmed Sami Helal ^{1, 3, 4} Alvaro Mayoral ⁵ Philippe Decorse ¹ Rémi Losno ⁶ Claude Lion ¹ Souad Ammar ¹ Thierry Le Gall ⁷ Miryana Hemadi ¹

1 ITODYS (UMR_7086) - Interfaces, Traitements, Organisation et Dynamique des Systèmes

2 Univ Paris Saclay, CEA, Inst Sci Vivant Joliot Curie, Serv Chim Bioorgan & Marquage, Bat 547, F-91191 Gif Sur Yvette, France

3 MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

4 Nucl Mat Author, POB 540, Cairo, Egypt

5 LMA - Laboratorio de microscopias avanzadas

6 IPGP - Institut de Physique du Globe de Paris

7 SCBM - Service de Chimie Bio-Organique et de Marquage

Abstract : Environmental pollution caused by heavy metals constitutes a serious public health problem. In the case of uranium depletion, amidoxime groups are important because of their high affinity for uranium(VI). New series of bis(amidoxime)s with catechol-derived anchor groups were tested (b-AMD-1 and b-AMD-2). The catechol groups were designed to bind to the surface of maghemite nanoparticles (MNPs), and two nanohybrid devices MNP-b-AMD-1 and MNP-b-AMD-2 were obtained. This strategy makes for efficient removal of U(VI) via its complexation with the bis(amidoxime)s (b-AMD) and also its extraction from aqueous solution by magnetic harvesting of the MNPs. The assynthesized and b-AMD-grafted MNPs were characterized by several techniques: X-ray diffraction (XRD), high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM), X-ray photoelectron spectrophotometry (XPS), thermal analysis (TG/DTA) and Fourier transform infrared spectroscopy (FTIR). Sorption tests were run at pH 6.5, which corresponds to the highest affinity and selectivity of b-AMD for U(VI). After magnetic separation, the chelation ability and the selectivity of MNP-b-AMD-1 and MNP-b-AMD-2 towards U(VI) were evaluated by measuring the residual U(VI) concentration in the supernatant by inductively coupled plasma-mass spectrometry (ICP-MS). The data were plotted according to the Langmuir and Freundlich isotherms; the maximal sorption capacity (q(max)) was 29 and 60 mg U g(-1) for MNP-b-AMD-1 and MNP-b-AMD-2, respectively. This confirms that bis(amidoxime) groups are good candidates for uranium depletion of aqueous solution

Keywords : Functionalization Sorption Amidoxime Iron Oxide Nanoparticle Uranium Removal Magnetic Separation

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Journal articles

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Sciences of the Universe [physics]

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New Iron Oxide Nanoparticles Catechol-Grafted with Bis(amidoxime)s for Uranium(VI) Depletion of Aqueous Solution

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New Iron Oxide Nanoparticles Catechol-Grafted with Bis(amidoxime)s for Uranium(VI) Depletion of Aqueous Solution

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