Synthesis of novel Na-rich mica and selective strontium ion exchange and fixation

Tatsuya Kodama, Sachiko Nagai, Kumiko Hasegawa, Ken Ichi Shimizu, Sridhar Komarneni

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1927-1942
Number of pages16
JournalSeparation Science and Technology
Volume37
Issue number8
DOIs
StatePublished - Jun 11 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

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