Ion exchange properties of the sulfur-modified biotite Academic Article uri icon


  • The ion exchange behavior of a sulfur-modified biotite towards Pb2+, Hg2+, Co2+, Cu2+, Cd2+ and Zn2+ ions has been studied. The ion exchange isotherms of divalent cations were determined and concentration equilibrium constants as a function of metal loading were analyzed. Sulfur modified biotite exhibits high affinity for Hg2+, Pb2+, Cu2+ and Cd2+ ions in individual solutions and in the presence of electrolytes. About 200 mg Hg/g uptake in 1.10-3 M Hg2+ solution and ~35 mg Hg/g in groundwater simulant or an alkaline simulant 2 M in NaNO3 + 1 M in NaOH was found. The possibility of a complex ion exchange and precipitation mechanism of the sulfur modified biotite towards the soft cations is proposed.

published proceedings


author list (cited authors)

  • Bortun, A. I., Bortun, L. N., Khainakov, S. A., & Clearfield, A.

citation count

  • 3

complete list of authors

  • Bortun, AI||Bortun, LN||Khainakov, SA||Clearfield, A

publication date

  • November 1998