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Studies on adsorption of uranium (VI) from aqueous solution by wheat straw
Author(s) -
Wang Xiao,
Xia Liangshu,
Tan Kaixuan,
Zheng Weina
Publication year - 2012
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.10582
Subject(s) - uranium , adsorption , aqueous solution , straw , sorption , freundlich equation , chemistry , nuclear chemistry , kinetics , langmuir , saturation (graph theory) , fourier transform infrared spectroscopy , inorganic chemistry , materials science , chemical engineering , metallurgy , organic chemistry , mathematics , physics , quantum mechanics , combinatorics , engineering
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, PO and SiO groups. © 2011 American Institute of Chemical Engineers Environ Prog, 2011