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).
Rights & PermissionsPrintExport