A novel swelling mica of composition, Na2.94(Mg5.55Ti0.07Fe0.04) (Al2.07Si5.83)O20F4 ·1.72H2O, was synthesized from kaolinite, and this mica was found to be very selective for Sr with a high capacity for uptake. Apparently, both tetrahedral and octahedral sheets contribute to the total negative charge in this mica. A relatively low-temperature heat treatment at 250°C of the Sr-exchanged mica resulted in the collapse of the hydrated interlayer spacings of the mica to immobilize strontium in a stable unhydrated phase.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Process Chemistry and Technology
- Filtration and Separation