Abstract

AbstractIn this work, anatase titanium dioxide (TiO2) with surface area (167 m2/g) and pore size diameters (17.8 nm) was synthesized by low temperature one-step hydrolysis technique, and its adsorption abilities to arsenate and fluoride, the severe poisonous inorganic contamination in aqueous solution, were evaluated. TiO2 prepared at hydrolysis temperature of 80°C and 0.2 mol/L Ti(SO4)2 concentration was optimum to remove As (V) and F−. Batch experiments showed that the adsorption of As (V) was more favored in the range of pH 2.0–8.0, while the uptake of F− was preferred only at pH 3.8. The maximum uptake calculated by Langmuir equation for As (V) and F− was 49.28 mg/g (pH 5.0) and 32.15 mg/g (pH 3.8), respectively. Ionic strength hardly has any effect on As (V) and F− removal. As (V) and F− kinetics study indicated that both the adsorption processes occurred rapidly; more than 82.6% of As (V) and 78.5% of F− could be adsorbed on TiO2 in the first 100 min, but adsorption equilibrium was not obtained unti...

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