Cesium selectivity of (Al+Na)-substituted tobermorite

Journal Article · Sat Jan 01 04:00:00 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]

---

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

Related Subjects

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