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Adsorption of Trace Selenium on Nano-Ti2 from Natural Water Samples

[ Vol. 11 , Issue. 3 ]

Author(s):

Ting Huang   Pages 193 - 198 ( 6 )

Abstract:


Anatase nano titanium oxide was used as a sorbent for the separation and preconcentration of selenium(IV) from liquor. The selenium was determined by hydride generation-atomic fluorescence spectrometry (HG-AFS) with KBH4-HCl. The results showed that the adsorption percentage of selenium( IV) was 92% at pH 4-6, and the elution by NaOH reached 95%. The adsorption equilibrium accorded with the Langmuir isotherm model and the maximum adsorption capacity was 32.17 mg g-1 at 293 K. The detection limit of selenium(IV) (3σ, n = 11) was 0.57 µg L-1 and the relative standard deviation was 7.48%. The process has been successfully applied to the contents determination of trace selenium(IV) in some natural water samples with satisfactory results.

Keywords:

Adsorption, natural water samples, nano-TiO2, selenium(IV).

Affiliation:

Department of Chemistry and Chemical Engineering, Ankang University, NO.92 of Yucai Road, Ankang, China.

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