Aniline Degration From The Efflunent Of Dying Biological Treatment By CuO/ZSM- Activated Persulfate

With the development of social economy,the issue of the treatment of aniline wastewater with a wide range of sources and serious pollution hazards has received increasing attention.The wet catalytic oxidation method is favored because it has the advantages of being able to completely degrade the aniline in the waste water,the cost is low,and the process is simple,and is often used to treat the amine-containing wastewater with a relatively high concentration.Although the traditional Fenton oxidation method can catalytically degrade aniline wastewater at normal temperature,this method consumes a large amount of hydrogen peroxide,and Cu2+ exists in the form of soluble salts in the reaction system,causing serious secondary pollution,and the catalyst will also occur serious loss.Based on this,in this study,the copper oxides were supported on the molecular sieves by the wet catalytic oxidation method,and the heterogeneous activated persulfate enabled it to efficiently degrade the aniline wastewater,hoping to solve the problem of catalyst loss and secondary pollution in the traditional crafts.Meanwhile,the degradation efficiency of aniline was increased.The main contents and results of this study are as follows:1.Cu O-activated persulfate degradation of aniline.The Cu O catalyst was prepared by chemical precipitation,and its structure properties were characterized by means of X-ray diffraction..Under normal temperature condition,the effects of different persulfate dosages,catalyst dosages,initial p H value and concentration of raw aniline water on the degradation of aniline wastewater were investigated.The results showed that when the catalyst dosage was 1.0 g/L,the persulfate dosage was 1.5 g/L,and the initial p H was 9.0,the reaction was carried out at room temperature for 60 min,and the aniline removal rate was over 65%.Moreover,the COD removal rate could up to 72%.The catalytic reaction kinetics show that the leading role in the degradation of aniline wastewater is ·OH and SO4-· radicals.Then used GC-MS to detect the raw water and effluent samples.It was found that most of the aniline in the system was degraded into p-benzoquinone,phthalic acid and phthalic acid esters.And under the optimal conditions of microwave-assisted reaction,the degradation rate of aniline reached 99.03%.2.Preparation of Cu O/ZSM-5 composite catalyst.The ZSM-5 zeolite molecular sieve is one of the most suitable catalyst supports because of its high adsorption performance,excellent thermal stability and green environmental protection characteristics.In this study,Cu SO4·5H2O was used as the precursor by impregnation method,and Cu O/ZSM-5 catalyst was prepared by loading Cu O on ZSM-5.The structure and properties of the materials were characterized by SEM,X-ray diffraction and Fourier infrared spectroscopy.3.Cu O/ZSM-5 activated persulfate degradation from the efflunent of dying biological treatment.The aniline in simulated dyeing wastewater（methyl orange,reactive blue 4 and aniline）was treated as the target.Under the conditions of ultraviolet light irradiation,different catalyst dosages,persulfate dosages,initial p H values and dyes were studied.The initial concentration and other factors affect the degradation effect under normal temperature conditions.The results showed that when the dosage of catalyst was 1.5g/L,the dosage of persulfate was 1.0g/L,and the initial p H was 3,the removal rate of aniline can reached 97.7%.The kinetics of Cu O/ZSM-5 photocatalytic system following the Langmuir-Hinshelwood equation,the rate constant for aniline is 0.02136 to 0.04753 min^-1.