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Synthesis and performance of a novel catalyst applied to the CWPO decolorization of direct blending purple (D-BL) on wastewater |
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Abstract A novel kind of Cu-La-Mo zeolite catalyst (Z/CLM) was prepared with impregnation and calcination hybrid method. A series of static and dynamic experiments was carried out to investigate the catalytic capability of prepared Z/CLM catalyst in the decolorization reaction, and direct blending purple D-BL was selected as target reactant. The experimental results gave out the optimum catalyst preparation conditions as, zeolite particle size of 60~80 mesh, calcination of 600℃ and 0.5h. In the static tests, the highest direct blending purple D-BL decolorization percentage was about 95.15% under the optimum condition, H2O2 8.33mL/L, pH 7.10. Further experiments revealed that the increase of the temperature and the NaCl concentration of wastewater will accelerate the decolorization reaction, and improve the removal efficiency. Besides, the dynamic fluidized bed experiment was implemented in a lab-scale reactor, and the experimental results confirm the removal capability of Z/CLM being 37.82mg/g to direct blending purple D-BL.
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Received: 17 January 2010
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