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In order to illustrate the thermodynamic characteristics of arsenic during alkaline pressure oxidation leaching process of lead anode slime (NaNO3 as oxidant; NaOH as alkaline reagent), the φ–pH diagrams of As–Na–H2O, N–H2O, As–N–Na–H2O systems at ionic mass concentration of 0.1 mol/kg and temperatures of 298, 373, 423 and 473 K were established according to thermodynamic calculation. The results...
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