Abstract
CuO-Fe2O3 composite material with strong magnetism and a large surface area is prepared by the co-precipitate method. Its adsorption properties towards Acid Red B (ARB) and the regeneration by catalytic combustion of organic compounds have been studied. The results show that the prepared CuO-Fe2O3 composite is an excellent adsorbent for ARB adsorption at acid condition. The presence of Cl− has no effect on ARB adsorption. But the SO 2−4 can inhibit ARB adsorption. After being recovered by the magnetic separation method, the adsorbent can be regenerated by catalytic oxidation of absorbate at 300°C in air atmosphere. The combustion reactions of ARB in the presence or absence of CuO-Fe 2O3 are studied by in situ diffuse reflection FTIR. The results indicate that, in the presence of CuO-Fe2O3, the degradation temperature is significantly lowered by the catalysis of CuO-Fe2O3, and ARB can be oxidized completely without volatile organic compound by-product; in comparison, in the absence of CuO-Fe2O3, the temperature needed for oxidation of ARB is higher and the reaction is incomplete with some N-containing harmful compounds produced. The reusability of CuO-Fe2O3 is also studied in successive seven adsorption-regeneration cycles.
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Wu, R., Qu, J., He, H. et al. Adsorption and catalytic combustion of ARB on CuO-Fe2O3 . Chin.Sci.Bull. 48, 2311–2316 (2003). https://doi.org/10.1360/03wb0083
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DOI: https://doi.org/10.1360/03wb0083