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γ-nano-Al 2 O 3 was used for the separation and enrichment of iridium (Ir(IV)) ions from an aqueous solution. A systematic study of the adsorption process was performed by varying pH, sorbent amount, sorption time and temperature. The adsorption efficiency could reach 99% at pH 3.0, suggesting that nano-Al 2 O 3 is an excellent sorbent for iridium ions. The sorbed iridium...
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