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Received August 3, 2010
Accepted December 2, 2010
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Degradation characteristic of TiO2-chitosan adsorbent on Rhodamine B and purification of industrial wastewater
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China 2College of Life Science and Technology, The Key Laboratory of Bioprocess of Beijing, Beijing University of Chemical Technology, Beijing 100029, China
suhaijia@126.com
Korean Journal of Chemical Engineering, May 2011, 28(5), 1241-1246(6), 10.1007/s11814-010-0501-3
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Abstract
Based on biosorption and photodegradation coupling technology, a novel adsorbent, which not only adsorbs the heavy metal ions but also degrades organic compound, was prepared by immobilization of nano-TiO2 on chitosan matrix. Degradation characteristic of Rhodamine B (Rh.B) was investigated by TiO2-chitosan adsorbents. The results showed that degradation ratio reached 94.3% by 0.2 g adsorbents under ultraviolet radiation light (UV) at initial Rh.B concentration of 10 mg/L and optimal pH of 9.0. Degradation and adsorption behavior characteristics were discussed in the presence of binary pollutants (Rh.B and Ag+). The coexistence of Ag+ intensely inhibited the degradation ability of Rh.B. Higher Ag+ concentration weakened the degradation ability. However, Rh.B did not affect the adsorption capacity of Ag+. Moreover, TiO2-chitosan adsorbent contributed to a higher degradation ability of organic pollutants in practical wastewater. Degradation capacity of contaminants in paper-making wastewater reached 60.8 mg/g at the initial COD concentration of 2,000 mg/L.
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References
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