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Abstract
S-doped TiO2 as a novel adsorbent for Cu2+ cations removal from aqueous solutions was synthesized by simple sol-gel process. Removal of Cu2+ cations from aqueous solutions was investigated with particular reference to the effects of initial Cu2+ cations concentration, pH-value, adsorbent dosage, and temperature on adsorption. It was found that the maximum adsorption capacity was 96.35 mg g−1 at 328 K. The adsorption equilibrium isotherms and the kinetic data were well described by the Langmuir and pseudo-second-order kinetic models, respectively. The high uptake capability of S-doped TiO2 makes it a potentially attractive adsorbent for the removal of heavy metal pollutants from aqueous solution.
ACKNOWLEDGEMENTS
The authors would like to thank the Natural Science Foundation Council of China (20271007 and 20331010), and Specialized Research Fund for the Doctoral Program of Higher Education (20030007014) for financial support.