| Phenolic compounds are important chemical material, it is not only cause serious effect on our daily life and harm for the human health, but also seriously damage the natural ecological balance to cause serious environmental pollution. Therefore, it is an unshirkable responsibility to protect the environment and benefit the human beings under the scientific research of the phenolic wastewater. In this thesis, the nano-sized particles of Fe3O4 were used as catalysts for degradation of the phenolic compounds and hydrogen peroxide was used as oxidation with self-prepared production. The advantages of this Fenton-like reagent have showed that catalyst is not only easy to be separated and recovered, feasible to be used repeatedly, but also has no secondary pollution to the environment. Before the treatment of the phenolic wastewater when pH was not needed adjusting, the method can make volatile phenol and CODCr in wastewater effectively reduced. The study process and results are as follows:(1) The nano-Fe3O4 was synthesized by coprecipitation and hydrothermal- coprecipitation and was characterized by X-ray diffraction (XRD),transmission electron microscope (TEM) and Fourier infrared ray (FT-IR). The nano-Fe3O4 could be used as catalysts for treatment of the phenolic wastewater by hydrothermal- coprecipitation.(2) The singe factor experiment was used to investigate the effects of treatment of process conditions with treated wastewater containing phenol content as the indexes. Catalyst was recycled several times and then the catalytic properties were studied under the optimized process conditions.(3) Preparation of nano-Fe3O4 had a good catalytic performance in the treatment of phenol and naphthol simulated wastewater. The removol rate of phenol and CODCr in simulated wastewater was high. The hydroxyl radical was captured by MB to detect its changes in the reaction process, and the possible mechanism was discussed in catalytic degradation of phenol wastewater.
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