超声波结合膨胀石墨及类芬顿试剂降解偶氮染料

发布时间：2018-03-22 10:41

本文选题：超声降解　切入点：膨胀石墨　出处：《河北师范大学》2017年硕士论文　论文类型：学位论文

【摘要】：近些年来,随着塑料,合成纤维,石油化工和印染行业的快速发展,水质污染严重程度不容忽视。这其中染料废水由于色度高,难生化降解、组分复杂等多重原因,成为了最难处理的污水类型之一。环境污染已经引起了世界范围的高度关注,污水处理作为环境保护领域的一个重要分支,尤其是难以生化降解的有机染料废水,已经有越来越多的科研工作者开始对其进行研究,试图找到一种积极有效的处理方法。因为传统的污水处理方法的局限性,科学家们在经过大量尝试之后,提出了高级氧化工艺(AOTs)处理染料有机废水的新方法。这种方法已经得到了广泛认可。本文研究了用高氯酸和丙酸混合液作插层剂制备无硫膨胀石墨的新方法。利用正交实验方法筛选出制备的最佳条件。在最佳条件下制备的可膨胀石墨的膨胀容积是260ml/g,产品不含硫。本文利用超声结合膨胀石墨(Expanded graphite,EG)降解法(US/EG)和超声结合类芬顿试剂降解法(US/Fenton-like reagent),降解有机印染污染物。选取酸性黑210、酸性嫩黄和弱酸性兰113作为研究对象。在本篇论文中,将酸性黑210、酸性嫩黄和弱酸性兰113作为基础染料模型,研究了其水溶液被超声均相降解的过程。本文还研究了超声-类芬顿试剂联合降解有机染料废水,结果表明超声-类芬顿联合体系的降解效果要明显优于两者单独的效果。论文中对膨胀石墨用量、超声功率、初始溶液pH、催化剂用量等多种影响因素进行了考察。结果表明:初始溶液pH在2-6时,反应系统达到最佳的反应条件。当pH为3时,三种偶氮染料污染物的降解率均达到最大。在单因素实验研究得出的最佳降解条件下,酸性黑210的降解率可达99.92%;酸性嫩黄的降解率可达99.89%;弱酸性兰的降解率可达99.65%。
[Abstract]:In recent years, with the rapid development of plastics, synthetic fiber, petrochemical industry and printing and dyeing industry, the serious degree of water pollution can not be ignored. Environmental pollution has attracted worldwide attention. Sewage treatment is an important branch of environmental protection, especially organic dye wastewater, which is difficult to biodegrade. More and more researchers have begun to study it in an attempt to find a positive and effective way to deal with it. Because of the limitations of traditional sewage treatment methods, scientists have tried a lot. A new method for the treatment of dye organic wastewater by advanced oxidation process (AOTs) has been widely accepted. A new method for preparing sulfur-free expanded graphite using perchloric acid and propionic acid as intercalation agent has been studied in this paper. The optimum preparation conditions were obtained by orthogonal experiment. The expansion volume of the expanded graphite prepared under the optimum conditions is 260 ml / g, and the product contains no sulfur. In this paper, the ultrasonic combined expanded graphite (Expanded graphite) degradation method (USP / EGG) and the ultrasonic binding fen are used to prepare the expanded graphite. Us / Fenton-like reagentine was used to degrade organic printing and dyeing pollutants. Acid black 210, acid yellow and weak acid blue 113 were selected as the research objects. Acid black 210, acid yellowish yellow and weak acid blue 113 were used as basic dye models to study the process of ultrasonic homogeneous degradation of their aqueous solution, and the degradation of organic dyestuff wastewater by combination of ultrasonic and Fenton reagent was also studied in this paper. The results show that the degradation effect of the ultrasonic-Fenton-like system is better than that of the two alone. In this paper, the amount of expanded graphite, ultrasonic power, The pH of the initial solution and the amount of catalyst were investigated. The results showed that the optimal reaction conditions were obtained when the pH of the initial solution was 2-6. The degradation rate of acid black 210 was 99.92%, acid tender yellow 99.89% and weak acid blue 99.65%.
【学位授予单位】：河北师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O613.71;O643.36

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