Selective solid-phase extraction of trace thallium with nano-Al2O3 from environmental samples
作者： Lei Zhang , Ting Huang , Xueyan Liu , Min Zhang , Kai Li
DOI: 10.1134/S1061934811040113
关键词:
摘要: A novel sorbent, nano-Al2O3 was employed for the separation and preconcentration of thallium from aqueous solution in batch equilibrium experiments. It found that adsorption percentage ions close to 100% at pH 4.5, desorption by 1.0 mL 0.25 M HCl reached 99%. The well described Langmuir isotherm model with maximum capacity 5.78 mg/g (20 ± 0.1°C). enrichment factor values Tl(III) 25 sample. Detection limit (3σ, n = 11) equal 0.8 μg/mL relative standard deviation (2.4%) were obtained. method has been successfully applied determination trace some environmental samples certified reference material polymetallic nodule (GBW07296) satisfactory results.
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