Adsorption of Au(Ⅲ) and Au(Ⅰ) complexes on δ-MnO<sub>2</sub>

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The sorption of AuCl<sub>4</sub><sup>-</sup>, AuCl<sub>2</sub><sup>-</sup> and Au(S<sub>2</sub>O<sub>3</sub>)<sub>2</sub><sup>3-</sup> on δ-MnO<sub>2<
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