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Studies on adsorption of uranium (VI) from aqueous solution by wheat straw

Authors

  • Xiao Wang,

    1. School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China
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  • Liangshu Xia,

    Corresponding author
    1. School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China
    • School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China
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  • Kaixuan Tan,

    1. School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China
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  • Weina Zheng

    1. School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, People's Republic of China
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Abstract

A fundamental investigation on the removal of uranium from aqueous solutions by wheat straw was conducted in batch conditions. The influence of different experimental parameters such as modified methods, pH, contact time, adsorbent dose, initial concentration, and temperature, on the kinetics of uranium removal was studied. The results showed that the higher adsorption rate of uranium on wheat straw was modified by NaOH. At 303 K and pH was 3.0, the saturation adsorption was up to 1.20 mg/g at approximately 120 min. The uranium uptake was quantitatively evaluated using sorption isotherms and the correlation coefficients showed that the Freundlich model gave a better fit than the Langmuir equation. The process followed a pseudo-second-order kinetics. Scanning electron microscope coupled with Fourier transform infrared analysis for wheat straw, demonstrated that uranium-containing sites existed on the surface structure with hydroxyl, carbonyl, P[BOND]O and Si[DOUBLE BOND]O groups. © 2011 American Institute of Chemical Engineers Environ Prog, 2011

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