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- W2791389421 abstract "Abstract Ordered mesoporous polymer-carbon composites containing amidoxime groups (AO-OMC) were successfully synthesized via in-situ polymerizing 2-Butenenitrile onto the external and internal surface of ordered mesoporous carbon (CMK-3). The characterization of small-angle X-ray diffraction, N2 adsorption–desorption isotherms and TEM confirmed that the polyacrylamidoxime was only coated on the mesopore walls with a thin layer rather than occupied the whole pores. The AO-OMC containing 16.8% polyacrylamidoxime (0.2AO-OMC) showed the highest adsorption capacity for U(VI) (322.6 mg·g−1 at pH = 5.0 and T = 298.15 K), which was significantly higher than CMK-3 (43.4 mg·g−1). XPS analysis suggested that the high adsorption capacity of 0.2AO-OMC was mainly attributed to the combination of U(VI) with abundant amidoxime groups via surface complexation and electrostatic interactions. The U(VI) selectivity was above 60% in a wide pH range from 3.0 to 5.0, which has not been reported to date, and reached the highest selectivity of 72.4% at pH = 4.0. The thermodynamic parameters calculated from temperature-dependent adsorption isotherms suggested that uranium adsorption onto 0.2AO-OMC was an endothermic and spontaneous process, and the 0.2AO-OMC exhibited excellent reusability and structural stability without any significant changes in the adsorption capacity after ten cycles. This work highlighted the simple synthesis and application of AO-OMC as an efficient material for the high elimination of U(VI) from large volumes of aqueous solutions in environmental pollution cleanup." @default.
- W2791389421 created "2018-03-29" @default.
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- W2791389421 date "2018-06-01" @default.
- W2791389421 modified "2023-10-17" @default.
- W2791389421 title "Ordered mesoporous polymer–carbon composites containing amidoxime groups for uranium removal from aqueous solutions" @default.
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- W2791389421 doi "https://doi.org/10.1016/j.cej.2018.02.044" @default.
- W2791389421 hasPublicationYear "2018" @default.
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