超重力法强化过硫酸盐体系处理染料废水
发布时间：2018-08-26 17:30
【摘要】：随着工业与经济的迅速发展,人类的生活水平得到了很大进步,但在环境方面付出了沉重的代价,由此环境污染问题也成为当今世界需要解决的重要问题。偶氮染料为印染行业使用最广泛的染料之一,偶氮染料废水由于排放量大,生物危害性强而广受关注。过硫酸盐体系高级氧化技术因其氧化能力出色,适用范围广而具有广阔的应用前景。本文通过旋转填充床与Na2S2O8/Fe2+、Na2S2O8/Fe2+/O3、 Na2S2O8/Fe2+/H2O2三种高级氧化技术相结合,考察了在旋转填充床中不同反应参数对脱色率的影响规律,得到了合适的反应条件,研究内容和成果如下：(1)以旋转填充床作为反应器,使用Na2S2O8/Fe2+体系处理甲基橙模拟染料废水。考察了溶液的初始pH、Fe2+和Na2S2O8的使用量、溶液初始浓度、旋转填充床转速等不同条件对处理效果带来的影响。研究表明,甲基橙脱色率随着Na2S2O8添加量、旋转填充床转速的增加而增加,随着溶液中初始甲基橙浓度的上升而减小,Fe2+添加量为0.6mmol/L是脱色率最好,在溶液初始pH为3-7的变化范围内脱色率较好。(2)在旋转填充床中进行了Na2S208/Fe2+/O3体系处理甲基橙废水的研究,与Fe2+/03体系进行了对比,考察了pH、旋转填充床转速、气液比、反应温度、臭氧浓度等因素对甲基橙脱色率的影响。实验表明,甲基橙脱色率随着旋转填充床转速、气液比和臭氧浓度的增加而增加,反应温度在25℃时甲基橙脱色率较好,在pH=4时脱色率最高。(3)在旋转填充床中进行了Na2S2O8/Fe2+/H2O2体系处理甲基橙废水的研究,与Fe2+/H2O2体系进行了对比,考察了pH、Fe2+浓度、H202添加量、反应温度、旋转填充床转速等因素对脱色率方面造成的影响。实验表明,甲基橙脱色率随着H202添加量、旋转填充床转速的增加而增加,Fe2+使用量在1 mmol/L时脱色率较好,在pH=4时甲基橙脱色率最高。
[Abstract]:With the rapid development of industry and economy, the living standards of human beings have been greatly improved, but they have paid a heavy price in the environment. Therefore, the problem of environmental pollution has become an important problem that needs to be solved in the world today. Azo dye is one of the most widely used dyes in printing and dyeing industry. The advanced oxidation technology of persulfate system has a broad application prospect because of its excellent oxidation ability and wide application range. In this paper, the effects of different reaction parameters on decolorization rate in rotating packed bed were investigated by combining with three advanced oxidation technologies, Na2S2O8/Fe2 Na 2S 2O 8 / Fe 2 / O 3 and Na2S2O8/Fe2 / H 2O 2, and the appropriate reaction conditions were obtained. The research contents and results are as follows: (1) Na2S2O8/Fe2 system is used to treat methyl orange simulated dye wastewater with rotating packed bed as reactor. The effects of different conditions, such as the initial pH,Fe2 and Na2S2O8, the initial concentration of the solution and the rotational speed of the rotating packed bed, on the treatment efficiency were investigated. The results show that the decolorization rate of methyl orange increases with the addition of Na2S2O8 and the rotational speed of rotating packed bed, and decreases with the increase of initial concentration of methyl orange in the solution. The decolorization rate of 0.6mmol/L is the best. The decolorization rate was better in the range of initial pH of 3-7. (2) the treatment of methyl orange wastewater in the Na2S208/Fe2 / O3 system was studied in a rotating packed bed. The results were compared with that in the Fe2 / 03 system. The rotational speed, gas-liquid ratio and reaction temperature of the pH, rotating packed bed were investigated. Effect of ozone concentration on decolorization rate of methyl orange. The experimental results show that the decolorization rate of methyl orange increases with the increase of rotating speed, gas-liquid ratio and ozone concentration, and the decolorization rate of methyl orange is better at 25 鈩，
本文编号：2205643
[Abstract]:With the rapid development of industry and economy, the living standards of human beings have been greatly improved, but they have paid a heavy price in the environment. Therefore, the problem of environmental pollution has become an important problem that needs to be solved in the world today. Azo dye is one of the most widely used dyes in printing and dyeing industry. The advanced oxidation technology of persulfate system has a broad application prospect because of its excellent oxidation ability and wide application range. In this paper, the effects of different reaction parameters on decolorization rate in rotating packed bed were investigated by combining with three advanced oxidation technologies, Na2S2O8/Fe2 Na 2S 2O 8 / Fe 2 / O 3 and Na2S2O8/Fe2 / H 2O 2, and the appropriate reaction conditions were obtained. The research contents and results are as follows: (1) Na2S2O8/Fe2 system is used to treat methyl orange simulated dye wastewater with rotating packed bed as reactor. The effects of different conditions, such as the initial pH,Fe2 and Na2S2O8, the initial concentration of the solution and the rotational speed of the rotating packed bed, on the treatment efficiency were investigated. The results show that the decolorization rate of methyl orange increases with the addition of Na2S2O8 and the rotational speed of rotating packed bed, and decreases with the increase of initial concentration of methyl orange in the solution. The decolorization rate of 0.6mmol/L is the best. The decolorization rate was better in the range of initial pH of 3-7. (2) the treatment of methyl orange wastewater in the Na2S208/Fe2 / O3 system was studied in a rotating packed bed. The results were compared with that in the Fe2 / 03 system. The rotational speed, gas-liquid ratio and reaction temperature of the pH, rotating packed bed were investigated. Effect of ozone concentration on decolorization rate of methyl orange. The experimental results show that the decolorization rate of methyl orange increases with the increase of rotating speed, gas-liquid ratio and ozone concentration, and the decolorization rate of methyl orange is better at 25 鈩，
本文编号：2205643
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