Application Of Fe-based Metallic Glass And Its Composite Materials In Organic Wastewater Treatment

With the rapidly deterioration of water pollution, how to efficiently and rapidly degrade wastewater has gradually become the focus of our purpose. In this thesis, we chose metallic glass and its composite material as the research object and exploring its degradation effect on high concentration organic wastewater and azo dye solution.The treatment of high concentrate organic wastewater using Fe-based alloys in the Fenton-like system was investigated. The removal rate of COD by using the Fe78Si9B13metallic glass (MG) reached85%, about30%and40%higher than that by the Fe78Si9B13crystalline alloy (CA) and by the traditional material Fe0, respectively. The treatment result by the Fe78Si9B13MG was more than65%higher and50times faster than that of the traditional aeration process with the same addition of Fe0. It has been proved that the Fe78Si9B13MG played an excellent catalytic activity in the oxidative degradation of organic compounds. Metallic glass was proved to have unique advantage on high concentration wastewater treatment.Fe78Si9B13metallic glass was applied to large-scale oil fracturing wastewater, considering the advantage on high concentration wastewater treatment. The optimum reaction conditions for the degradation process were found by the adjustment of experimental parameter. By the excellent treatment result offered by metallic glass, a serious of engineering problem was resolved.The metallic glass/titanium dioxide powders (MG/TiO2) with enhanced photocatalytic oxidation activity were synthesized, which exhibit a higher efficiency in decolorizing methylene blue solutions (MB). Compared with the pure TiO2and crystalline alloy/TiO2(CA/TiO2) under the same circumstances, its degradation rate was60%and30%higher, respectively. Furthermore, compared with the CA/TiO2, the MG/TiO2photocatalytic rate was three times faster when decolorizing MB.The structural and feature analysis before and after the treatment process was investigated by XRD, DSC and SEM. We consider that the excellent degradation result is because of the special structure which arises from the arrangement of atoms. Considering the excellent intrinsic high-performance photocatalytic degradation under visible light irradiation, these novel powders were proven to have potential applications in water purification industry.We focus our attention on metallic glass as environmental materials, by the adjustment of treatment condition and the made of composite material, the application area was extended and the exciting result was achieved. It’s meaningful both in scientific area and application value.