1. Selective Cobalt (II) Exchange Properties of Na-2-Mica and Na-ETS-4
- Author
-
Sridhar Komarneni and Young Dong Noh
- Subjects
Ion exchange ,Chemistry ,General Chemical Engineering ,Sodium ,Inorganic chemistry ,chemistry.chemical_element ,General Chemistry ,Ion ,Phase (matter) ,medicine ,Mica ,Swelling ,medicine.symptom ,Hydrate ,Cobalt ,Nuclear chemistry - Abstract
Co2+ exchange isotherms and Kielland plots were determined for highly-charged sodium swelling mica (Na-2-mica) and sodium Engelhard Titano-Silicate-4 (Na-ETS-4). The results showed that both Na-2-mica and Na-ETS-4 were highly selective for Co2+ at (equivalent fraction) of < 0.3. X-ray diffraction (XRD) patterns after 2Na+ → Co2+ exchange process were examined to check for change in d001-spacing of Na-2-mica. As the uptake of Co ions increased, strong ∼14 A phase (two-layer hydrate) of Na-2-mica increased, while the ∼12 A phase (one-layer hydrate) decreased. These synthetic ion exchangers have a great potential for decontamination of radioactive or stable cobalt from waste water and soils.
- Published
- 2012
- Full Text
- View/download PDF