Study on selective sorption of 137Cs on Al-substituted calcium silicate hydroxy hydrate

Department of Chemistry, Dr. H. S. Gour University, Sagar-470 003, India Manuscript received 16 February 2000, revised 23 November 2000, accepted 24 February 2001 Sorption properties have been investigated by radiometric (tracer) technique at room temperature for aluminium substituted calcium silicate hydroxy hydrate, known as tobermorite. The 137Cs selectivity has been examined in presence of 1000 times concentrated solution of Na+ , Ca2+ and Ba2+. The results suggest that the title phase could be used for immobilization of radioactive cesium. Cation exchange reaction takes place mainly from edge and planar surface sites along with interlayer Ca2+ sites