Abstract
The adsorption of iron(III)‐cyanide complex anions to granular activated carbon was investigated. The iron(III)‐cyanide complex ion binding capacity of the adsorbent was shown as a function of initial pH, initial iron(III)‐cyanide complex ion and adsorbent concentrations. The results indicated that a significant reduction of iron(III)‐cyanide complex ions was achieved at pH 13.0, a highly alkaline condition. The equilibrium loading capacity of adsorbent was 410.0 mg/g at 1255.0 mg/l initial iron(III)‐cyanide complex ion concentration at this initial pH value. The Freundlich, Langmuir and Redlich‐Peterson adsorption models were fitted to the equilibrium data at pH 3.0, 7.0 and 13.0. The equilibrium data could be best fitted to the Langmuir and Redlich‐Peterson adsorption models over the entire concentration range at all the studied initial pH values.
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