alexa As(III) removal by hydrous titanium dioxide prepared from one-step hydrolysis of aqueous TiCl(4) solution.
Chemical Engineering

Chemical Engineering

Journal of Advanced Chemical Engineering

Author(s): Xu Z, Li Q, Gao S, Shang JK

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Abstract Hydrous titanium dioxide (TiO(2)·xH(2)O) nanoparticles were synthesized by a low-cost one-step hydrolysis process with aqueous TiCl(4) solution. These TiO(2)·xH(2)O nanoparticles ranged from 3 to 8 nm and formed aggregates with a highly porous structure, resulting in a large surface area and easy removal capability from aqueous environment after the treatment. Their effectiveness on the removal of As(III) (arsenite) from water was investigated in both laboratory and natural water samples. The adsorption capacity on As(III) of these TiO(2)·xH(2)O nanoparticles reached over 83 mg/g at near neutral pH environment, and over 96 mg/g at pH 9.0. Testing with a As(III) contaminated natural lake water sample confirmed the effectiveness of these TiO(2)·xH(2)O nanoparticles in removing As(III) from natural water. The high adsorption capacity of the TiO(2)·xH(2)O nanoparticles is related to the high surface area, large pore volume, and the presence of high affinity surface hydroxyl groups. Copyright © 2010 Elsevier Ltd. All rights reserved. This article was published in Water Res and referenced in Journal of Advanced Chemical Engineering

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