Adsorption of Arsenite(III) and Arsenate(V) from Drinking Water Using Amorphous and Anatase Titanium Dioxide as the Adsorbent

Yu Chao Tang; Xian Huai Huang; Li Hua Tang; Xin Li; Li Ping Xue; Yuan Jun Yao; Li Juan Wang

doi:10.4028/www.scientific.net/AMM.71-78.447

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Adsorption of Arsenite(III) and Arsenate(V) from...

Adsorption of Arsenite(III) and Arsenate(V) from Drinking Water Using Amorphous and Anatase Titanium Dioxide as the Adsorbent

Abstract:

Arsenite(III) and arsenate(V) removal from low-arsenic concentration drinking water by amorphous and anatase TiO₂ adsorbents were studied in this paper. X-ray diffraction (XRD) and BET surface area analysis were used to characterize the physical and chemical properties of the adsorbents. Pore size calculated from adsorption average pore width (4V/A by BET) is 3.92 nm of amorphous TiO₂ and 11.0 nm of anatase TiO₂. The BET surface specific area of amorphous TiO₂ was found to be 205 m²/g and anatase TiO₂ was 115.6 m²/g, respectively. Amorphous TiO₂ shows more efficiency than anatase TiO₂ for As(III) and As(V) removal. About 80% of As(V) and 60% of As (III) can be removed within 2h reaction when dosage of amorphous TiO₂ was only 0.1g/L. High temperature can facilitate the adsorption of As(V) but exhibit no obviously influence on As(III). Adsorption kinetics data were found to be best described by the modified pseudo-second-order kinetics model which can be described by Equation 1/(Q_e-Q_t)-1/Q_e=k∙tⁿ for arsenite(III) and arsenate(V) removal.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

447-450

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.447

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Online since:

July 2011

Authors:

Yu Chao Tang, Xian Huai Huang, Li Hua Tang, Xin Li, Li Ping Xue, Yuan Jun Yao, Li Juan Wang

Keywords:

Adsorption, Arsenate(v), Arsenite(iii), Drinking Water, TiO₂

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