Synthesis and characterization of a novel layered sodium titanium silicate Na{sub 2}TiSi{sub 2}O{sub 7}{center_dot}2H{sub 2}O

Journal Article · Sat Mar 01 00:00:00 EST 1997 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299708934479· OSTI ID:512881

Clearfield, A; Bortun, A I; Bortun, L N; Cahill, R A ^[1]

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1. Texas A&M Univ., College Station, TX (United States)

A novel layered sodium titanium silicate Na{sub 2}TiSi{sub 2}O{sub 7}{center_dot}2H{sub 2}O has been synthesized by the reaction of a titanium-hydrogen peroxide complex and silicic acid in alkaline media under mild hydrothermal conditions (200{degree}C). The product was characterized by elemental analysis, TGA, FT-IR, MAS {sup 29}Si and {sup 23}Na NMR and X-ray spectroscopy. The intercalation reaction of n-alkylamines from the gaseous phase and the ion exchange behavior of Na{sub 2}TiSi{sub 2}O{sub 7}{center_dot}2H{sub 2}O towards alkali, alkaline earth and some transition metal ions in model individual and complex solutions were studied. It was found that the layered sodium titanium silicate contains acidic hydroxyl functional groups, which results in cation uptake at pH>1.5. The high affinity of the exchanger for cesium in weakly acid and neutral solutions makes it a promising material for the treatment of some types of nuclear wastes, contaminated ground water and different biological liquors. 20 refs., 10 figs., 6 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 512881
• Journal Information: Solvent Extraction and Ion Exchange, Vol. 15, Issue 2; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
SODIUM COMPOUNDS
SYNTHESIS
ION EXCHANGE
SILICON 29
SODIUM 23
THERMAL GRAVIMETRIC ANALYSIS
X-RAY SPECTROSCOPY
NUCLEAR MAGNETIC RESONANCE
FOURIER TRANSFORM SPECTROMETERS
US EPA
SILICIC ACID
WATER POLLUTION CONTROL
RADIOACTIVE WASTE PROCESSING
ALKALI METALS
ADSORPTION
NUMERICAL DATA