Ion exchange properties of the sulfur-modified biotite
- Additional Document Info
- View All
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.
SOLVENT EXTRACTION AND ION EXCHANGE
author list (cited authors)
Bortun, A. I., Bortun, L. N., Khainakov, S. A., & Clearfield, A.
complete list of authors
Bortun, AI||Bortun, LN||Khainakov, SA||Clearfield, A