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Strontium Adsorption on Tantalum-Doped Hexagonal Tungsten Oxide

Strontium Adsorption on Tantalum-Doped Hexagonal Tungsten Oxide

Xingliang Li, Wanjun Mu, Xiang Xie, Bijun Liu, Hui Tang, Guanhong Zhou, Hongyuan Wei, Yuan Jian, Shunzhong Luo

J Hazard Mater. 2014 Jan 15;264:386-94.

PMID: 24316810

Abstract:

Hexagonal tungsten oxide (hex-WO3) has the potential to separate (137)Cs and (90)Sr from nuclear power plant or fission (99)Mo production waste. This study aims to increase the capacity of hex-WO3 to adsorb Sr(2+). Ta-doped hex-WO3 was synthesized by the hydrothermal treatment of sodium tungstate dihydrate and tantalum chloride in concentrated HCl, in the presence of ammonium sulfate. Incorporating Ta into the WO3 framework caused the interlayer spacing to expand, and the band gap to shift to higher energy. The Sr(2+) adsorption capacity of Ta-doped hex-WO3 was significantly higher than that of hex-WO3. Sr(2+) adsorption reached equilibrium within 2h in acidic solution. Maximum Sr(2+) removal occurred at pH 4. Sr(2+) uptake by hex-WO3 was described better by the Freundlich model than by the Langmuir model. Sr(2+) adsorption on hex-WO3 was spontaneous under the studied conditions.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13451053	Strontium tungsten oxide		13451-05-3	Price

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