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Xie Dongmei, Cao Linhong, Cui Jinli. Preparation and evaluation of TiO2 granule for As(III) removal from water[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1279-1284.
Citation: Xie Dongmei, Cao Linhong, Cui Jinli. Preparation and evaluation of TiO2 granule for As(III) removal from water[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1279-1284.
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Preparation and evaluation of TiO2 granule for As(III) removal from water

  • 1.

    State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China

  • 2.

    Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China

  • 3.

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

  • Received Date: 05/05/2012
    Accepted Date: 08/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Titanium dioxide (TiO2) granule was prepared using titanyl sulfate and polyvinyl alcohol (PVA) in ice-water bath, and its adsorption ability was investigated. The surface morphology and structure of the synthesized TiO2 granule were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The TiO2 exhibited anatase form with a specific surface area of 246 m2/g. The adsorption kinetics of TiO2 granule for arsenite (As(III)) in simulated groundwater indicated that the adsorption process followed a pseudo-second order reaction model. The adsorption equilibrium was fitted using Langmuir and Freundlich equations. The results followed Langmuir model with adsorption capacity of 22.3 mg/g. The maximum uptake of As occurred at approximately pH 9.1, and CO32- had significant impact on the adsorption of As(III). Field experiment was conducted using a filter pitcher filled with 110 g TiO2 granule. The result demonstrated that total As in groundwater decreased from 190 μg/L to less than 10 μg/L after 3 600 bed volume, which met the national standard for drinking water.
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Preparation and evaluation of TiO2 granule for As(III) removal from water

  • Received Date: 05/05/2012
  • Accepted Date: 08/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: Titanium dioxide (TiO2) granule was prepared using titanyl sulfate and polyvinyl alcohol (PVA) in ice-water bath, and its adsorption ability was investigated. The surface morphology and structure of the synthesized TiO2 granule were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The TiO2 exhibited anatase form with a specific surface area of 246 m2/g. The adsorption kinetics of TiO2 granule for arsenite (As(III)) in simulated groundwater indicated that the adsorption process followed a pseudo-second order reaction model. The adsorption equilibrium was fitted using Langmuir and Freundlich equations. The results followed Langmuir model with adsorption capacity of 22.3 mg/g. The maximum uptake of As occurred at approximately pH 9.1, and CO32- had significant impact on the adsorption of As(III). Field experiment was conducted using a filter pitcher filled with 110 g TiO2 granule. The result demonstrated that total As in groundwater decreased from 190 μg/L to less than 10 μg/L after 3 600 bed volume, which met the national standard for drinking water.

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