Cesium selectivity of (Al+Na)-substituted tobermorite

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(94)90146-5· OSTI ID:7036852

Shrivastava, O P; Komarneni, S ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States). Materials Research Lab.

Several synthetic tobermorites with different levels of [Al+Na] substitution were prepared from two different types of starting materials and their cation exchange and cesium selective properties were investigated. The substituted tobermorites were found to have high cation exchange capacities and very high selectivities for Cs[sup +] ion. Cesium selectivity of the substituted tobermorites was demonstrated in the presence of divalent cations such as Ca[sup 2+], Mg[sup 2+], Ba[sup 2+] and univalent cations such as Na[sup +], K[sup +] and Li[sup +] which are one hundred times more concentrated than the cesium ion. The uptake of Cs is maximum in the presence of highly hydrated Mg[sup 2+] and Li[sup +] ions whereas it is minimum in the presence of less hydrated K[sup +] and Ba[sup 2+] ions due to steric limitations of the tobermorite structure.

• OSTI ID: 7036852
• Journal Information: Cement and Concrete Research; (United States), Vol. 24:3; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CESIUM
ION EXCHANGE
ION EXCHANGE MATERIALS
CHEMICAL PREPARATION
PERFORMANCE TESTING
BARIUM
CALCIUM
LITHIUM
MAGNESIUM
POTASSIUM
SODIUM
ALKALI METALS
ALKALINE EARTH METALS
ELEMENTS
MATERIALS
METALS
SYNTHESIS
TESTING
400105* - Separation Procedures