Adsorption of copper cyanide on chemically active adsorbents

J. S. Lee, N. V. Deorkar, L. L. Tavlarides

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18 Scopus citations


An inorganic chemically active adsorbent (ICAA), SG(1)-TEPA (tetraethylenepentaamine)-propyl, is developed for removal, recovery, and recycling of copper cyanide from industrial waste streams. Equilibrium studies are executed to determine and model adsorption of the copper cyanide complex from aqueous solutions in a batch and packed column. It appears that adsorption is dependent on anionic copper cyanide species and the basicity of the ligand. Aqueous-phase equilibrium modeling shows that monovalent (Cu(CN)2-), divalent (Cu(cN)32-), and trivalent (Cu(CN)43-) species of copper cyanide exist in the solution, depending on the pH and the concentration of total cyanide ions. Batch adsorption data are modeled using a modified multicomponent Langmuir isotherm which includes aqueous-phase speciation and basicity of the SG(1)-TEPA-propyl. This developed model is applied with a mass balance equation to describe the adsorption of copper cyanide complexes in a packed column.

Original languageEnglish (US)
Pages (from-to)2812-2820
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Issue number7
StatePublished - Jul 1998

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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