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Chemical Research in Chinese Universities ›› 2010, Vol. 26 ›› Issue (6): 1020-1024.

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Separation and Determination of Trace Amounts of Thallium by Nano-TiO2 Combined with Microwave Irradiation

ZHANG Lei*, HUANG Ting, GUO Xing-jia and LIU Xue-yan   

  1. College of Chemistry, Liaoning University, Shenyang 110036, P. R. China
  • Received:2009-11-18 Revised:2010-02-08 Online:2010-11-25 Published:2010-12-01
  • Contact: ZHANG Lei E-mail:zhanglei63@126.com
  • About author:ZHANG Lei. E-mail: zhanglei63@126.com
  • Supported by:

    Supported by the Excellent Talents Project(No.2009R30) and Innovation Team Project(No.2007T053) of the Education  Department of Liaoning Province, China.

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Abstract: Nano-TiO2 was employed for the separation and preconcentration of thallium. It was found that the adsorption ratio of thallium ions was more than 98% at pH 4.5 and the desorption ratio reached 99% under microwave irradiation for 3 min at 350 W. The adsorption equilibrium was well described by the Langmuir isotherm model with a maximum adsorption capacity of 4.09 mg/g[(20±0.1) °C]. The nano-TiO2 was successfully applied to the determination of element thallium in the certified reference material polymetallic nodule and water samples.

Key words: Tl(III), Preconcentration, Nano-TiO2, Microwave irradiation desorption