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. 2017 May 30;8:15369. doi: 10.1038/ncomms15369

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(a) Effect of contact times on uranyl(VI) sorption onto SZ-3 at pH 4.5 and 1.0 under stirring, with C₀=10 p.p.m., mV⁻¹=1 mg ml⁻¹; (b) the sorption data fitted by Langmuir (green solid) and Freundlich (yellow dash) models at pH=4.5, respectively; (c) competitive sorption of coexistent ions on SZ-3 at pH=4.5, with molar ratio of metal ions to uranyl cations are ∼10 times.