光助非均相Fenton脱色有机染料的研究
发布时间：2018-09-14 16:24
【摘要】：我国是有机染料生产和使用的大国,在生产和使用有机染料的过程中产生的废水是造成环境污染的一个重要方面,因此针对有机染料废水的处理净化研究非常必要,其中利用光助非均相Fenton反应体系处理染料废水是近年来研究的热点。有机染料依据染料分子在溶液中的解离状态可以将其主要分为阳离子染料及阴离子染料,本文主要选取阳离子染料罗丹明B、阳离子红X-GRL及阴离子染料酸性品红为研究对象,研究利用光助非均相Fenton体系对上述三种染料进行脱色的效果、反应动力学以及反应机理,以期对处理和净化阴、阳两种不同离子类型的有机染料废水提供一定程度的理论指导和试验依据。本文利用振荡浸渍法实现了Na-Y型分子筛和Ls-5000氨基磷酸型螯合树脂对Fe2+的负载,制备了Fe2+/NaY分子筛及Fe2+/Ls-5000螯合树脂型两种不同的非均相Fenton催化剂,并使用这两种催化剂对阴、阳离子染料的吸附和光催化氧化性能进行了研究,结果表明制备的催化剂对罗丹明B、阳离子红X-GRL及酸性品红染料均具有不同程度的吸附和光催化氧化效能,可用于上述三种染料的脱色处理过程,且Fe2+/NaY分子筛催化剂具有一定的重复利用效能,有效避免了环境的二次污染。使用制备的两种催化剂分别对罗丹明B、阳离子红X-GRL及酸性品红染料进行光助非均相Fenton脱色的研究。通过催化剂质量、H2O2体积、可见光照的功率、染料的初始浓度及pH等单因素试验结果确立影响罗丹明B、阳离子红X-GRL以及酸性品红脱色率较大的四个因素进行正交试验,即催化剂质量、溶液pH、H2O2的体积以及光照功率,获得脱色上述三种染料的最佳工艺条件。通过对比脱色反应前后染料紫外-可见吸收光谱发现可见光/Fe2+-NaY分子筛/H2O2和可见光/Fe2+-Ls-5000螯合树脂/H2O2体系均对罗丹明B、阳离子红X-GRL及酸性品红分子结构中的发色基团进行了显著的氧化破坏,得到较高的脱色率。论文还分析讨论了可见光/Fe2+-NaY分子筛/H2O2和可见光/Fe2+-Ls-5000螯合树脂/H2O2两个反应体系脱色罗丹明B、阳离子红X-GRL以及酸性品红的动力学及反应机理;认为脱色反应过程包括吸附作用和羟基自由基的氧化作用。
[Abstract]:China is a large country in the production and use of organic dyes. The wastewater produced in the process of producing and using organic dyes is an important aspect of environmental pollution. Therefore, it is necessary to study the treatment and purification of organic dyes wastewater. Among them, the treatment of dye wastewater by photo-assisted heterogeneous Fenton reaction system is a hot topic in recent years. Organic dyes can be mainly divided into cationic dyes and anionic dyes according to the dissociation state of dye molecules in solution. In this paper, cationic dyes Rhodamine B, cationic red X-GRL and anionic dye acid fuchsin are selected as research objects. The decolorization effect, reaction kinetics and reaction mechanism of the above three dyes by photo-assisted heterogeneous Fenton system were studied. The organic dye wastewater with two different ion types provides some theoretical guidance and experimental basis. In this paper, Na-Y molecular sieve and Ls-5000 aminophosphoric acid chelating resin were supported on Fe2 by oscillatory impregnation method. Two heterogeneous Fenton catalysts, Fe2 / nay molecular sieve and Fe2 / Ls-5000 chelate resin, were prepared. The adsorption and photocatalytic oxidation properties of cationic dyes were studied. The results showed that the prepared catalysts had different adsorption and photocatalytic effects on Rhodamine B, cationic red X-GRL and acid fuchsin dyes. It can be used in the decolorization process of the above three dyes, and the Fe2 / nay zeolite catalyst has a certain reuse efficiency, which effectively avoids the secondary pollution of the environment. The photo-assisted decolorization of Rhodamine B, cationic red X-GRL and acid fuchsin dye with heterogeneous Fenton was studied using two kinds of catalysts. Four factors affecting the decolorization rate of Rhodamine B, cationic red X-GRL and acid fuchsin were determined by single factor test, such as the volume of H _ 2O _ 2, the power of visible light, the initial concentration of dye and pH. The optimum conditions for decolorizing the above three dyes were obtained, such as the mass of catalyst, the volume of solution pH,H2O2 and the illumination power. By comparing the UV-Vis absorption spectra of dyes before and after decolorization reaction, it was found that both visible / Fe _ 2-NaY molecular sieve / H _ 2O _ 2 and visible light / Fe _ 2-Ls-5000 chelating resin / H _ 2O _ 2 system had chromophore groups in Rhodamine B, cationic red X-GRL and acidic fuchsin molecular structure. The mass was destroyed significantly by oxidation. Higher decolorization rate was obtained. The kinetics and reaction mechanism of decolorization of Rhodamine B, cationic red X-GRL and acid fuchsin by visible light / Fe _ 2-NaY molecular sieve / H _ 2O _ 2 and visible light / Fe _ 2-Ls-5000 chelating resin / H _ 2O _ 2 were also discussed. The decolorization process includes adsorption and hydroxyl radical oxidation.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O643.36;X788
本文编号：2243241
[Abstract]:China is a large country in the production and use of organic dyes. The wastewater produced in the process of producing and using organic dyes is an important aspect of environmental pollution. Therefore, it is necessary to study the treatment and purification of organic dyes wastewater. Among them, the treatment of dye wastewater by photo-assisted heterogeneous Fenton reaction system is a hot topic in recent years. Organic dyes can be mainly divided into cationic dyes and anionic dyes according to the dissociation state of dye molecules in solution. In this paper, cationic dyes Rhodamine B, cationic red X-GRL and anionic dye acid fuchsin are selected as research objects. The decolorization effect, reaction kinetics and reaction mechanism of the above three dyes by photo-assisted heterogeneous Fenton system were studied. The organic dye wastewater with two different ion types provides some theoretical guidance and experimental basis. In this paper, Na-Y molecular sieve and Ls-5000 aminophosphoric acid chelating resin were supported on Fe2 by oscillatory impregnation method. Two heterogeneous Fenton catalysts, Fe2 / nay molecular sieve and Fe2 / Ls-5000 chelate resin, were prepared. The adsorption and photocatalytic oxidation properties of cationic dyes were studied. The results showed that the prepared catalysts had different adsorption and photocatalytic effects on Rhodamine B, cationic red X-GRL and acid fuchsin dyes. It can be used in the decolorization process of the above three dyes, and the Fe2 / nay zeolite catalyst has a certain reuse efficiency, which effectively avoids the secondary pollution of the environment. The photo-assisted decolorization of Rhodamine B, cationic red X-GRL and acid fuchsin dye with heterogeneous Fenton was studied using two kinds of catalysts. Four factors affecting the decolorization rate of Rhodamine B, cationic red X-GRL and acid fuchsin were determined by single factor test, such as the volume of H _ 2O _ 2, the power of visible light, the initial concentration of dye and pH. The optimum conditions for decolorizing the above three dyes were obtained, such as the mass of catalyst, the volume of solution pH,H2O2 and the illumination power. By comparing the UV-Vis absorption spectra of dyes before and after decolorization reaction, it was found that both visible / Fe _ 2-NaY molecular sieve / H _ 2O _ 2 and visible light / Fe _ 2-Ls-5000 chelating resin / H _ 2O _ 2 system had chromophore groups in Rhodamine B, cationic red X-GRL and acidic fuchsin molecular structure. The mass was destroyed significantly by oxidation. Higher decolorization rate was obtained. The kinetics and reaction mechanism of decolorization of Rhodamine B, cationic red X-GRL and acid fuchsin by visible light / Fe _ 2-NaY molecular sieve / H _ 2O _ 2 and visible light / Fe _ 2-Ls-5000 chelating resin / H _ 2O _ 2 were also discussed. The decolorization process includes adsorption and hydroxyl radical oxidation.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O643.36;X788
【参考文献】
相关期刊论文 前10条
1 任南琪;周显娇;郭婉茜;杨珊珊;;染料废水处理技术研究进展[J];化工学报;2013年01期
2 梁佳;曹明明;;印染废水特点及其处理技术[J];地下水;2011年02期
3 刘杨先;;非均相Photo-Fenton反应中催化剂及其光催化机理研究进展[J];化学工业与工程技术;2010年05期
4 尤特;唐运平;;Photo-Fenton技术处理难降解有机废水的研究进展[J];天津工业大学学报;2010年04期
5 吴伟;吴程程;赵雅萍;;非均相Fenton技术降解有机污染物的研究进展[J];环境科学与技术;2010年06期
6 丁绍兰;李郑坤;王睿;;染料废水处理技术综述[J];水资源保护;2010年03期
7 刘杨先;张军;盛昌栋;张永春;赵亮;;非均相Photo-Fenton反应中负载型光催化剂研究进展[J];现代化工;2010年04期
8 张瑛洁;马军;宋磊;柳旭升;赵吉;吴培瑛;;树脂负载Fe~(3+)/Cu~(2+)多相类芬顿降解染料橙黄[J];环境科学学报;2009年07期
9 徐蕾;宋如翠;;H_2O_2与UV/TiO_2协同体系光催化降解酸性品红的研究[J];吉林工程技术师范学院学报;2008年11期
10 赵超;黄应平;方艳芬;王奇;罗光富;刘立明;赵进才;;分子筛负载Fe~(3+)可见光协助降解有机污染物[J];环境化学;2008年01期
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