Synthesis and characterization of a novel layered tin(IV) phosphate with ion exchange properties

Journal Article · Thu Apr 01 00:00:00 EST 1999 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(99)00076-8· OSTI ID:684412

Bortun, A I; Bortun, L N; Clearfield, A ^[1]; Khainakov, S A ^[1]; Jaimez, E; Garcia, J R ^[2]

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1. Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry
2. Univ. de Oviedo (Spain). Dept. de Quimica Organica e Inorganica

A novel layered tin(IV) phosphate, Sn(NH{sub 4}PO{sub 4})(HPO{sub 4}){center_dot}2H{sub 2}O ({delta}-SnP-NH{sub 4}), was synthesized under mild hydrothermal conditions (190 C) in the presence of urea. The treatment of this compound with mineral acids gave a new phase of tin(IV) bis(monohydrogenphosphate), Sn(HPO{sub 4}){sub 2}{center_dot}3H{sub 2}O ({delta}-SnP-H). The layered nature of the solid was confirmed from amine intercalation, exfoliation in alkaline media, and the ion exchange behavior towards alkali and alkaline earth ions. High affinity (K{sub d}{sup Cs} {approximately} 5 {times} 10{sup 4} to 2 {times} 10{sup 5} mL g{sup {minus}1}) and capacity (160--200 mg Cs{sup +} per g of exchanger) for Cs{sup +} makes these materials promising for selective radioactive cesium removal from contaminated groundwater and nuclear waste.

• Sponsoring Organization: Comision Interministerial de Ciencia y Tecnologia (Spain); USDOE, Washington, DC (United States)
• OSTI ID: 684412
• Journal Information: Materials Research Bulletin, Vol. 34, Issue 6; Other Information: PBD: Apr 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
05 NUCLEAR FUELS
PHASE STUDIES
CHEMICAL PREPARATION
TIN PHOSPHATES
RADIOACTIVE WASTE PROCESSING
LAYERS
ION EXCHANGE
GROUND WATER