《高级氧化工艺去除小分子羧酸的对比研究》由会员分享，可在线阅读，更多相关《高级氧化工艺去除小分子羧酸的对比研究（41页珍藏版）》请在金锄头文库上搜索。
1、*本科毕业论文 高级氧化工艺去除小分子羧酸的对比研究本科生毕业论文（设计）高级氧化工艺去除小分子羧酸的对比研究摘要摘要 本课题采用深度处理法，即高级氧化技术（工艺）去除水中小分子羧酸，并运用液相色谱法来进行小分子羧酸的测定。实验中选取的三种不同的高级氧化技术分别为：臭氧氧化工艺，芬顿氧化工艺和光催化氧化工艺，而去除的目标物为三种常见的小分子羧酸，分别为：甲酸，草酸和水杨酸。实验通过比较各个工艺的去除效果来判断优劣，并选取最佳反应条件。实验结果表明：臭氧氧化工艺对小分子羧酸的去除率极低，不适合作为去除工艺；而对于500mL含小分子羧酸的溶液，在pH=3，H2O2的加入量为0.36mol，Fe2+
2、的加入量为1mmol，反应时间为20min的条件下，通过Fenton氧化工艺进行实验能使小分子羧酸的去除率达到96%以上，去除效果十分突出；光催化氧化工艺选择的是UV/H2O2联用技术，在500mL小分子羧酸溶液中，反应初始pH=4，H2O2的加入量为0.48mol，反应时间为40min时，去除率可达60%以上，去除效果十分明显，但与Fenton氧化工艺比较还是有所不足。高级氧化工艺中氧化分解产生的OH是去除小分子羧酸的主要物质，产生OH能力的大小是判断一个高级氧化工艺去除效果极为重要的因素。光催化氧化工艺在波长为256nm的紫外光照下分解H2O2产生的OH不够多，因而对小分子羧酸的去除效果未
3、达到最高；而对于Fenton氧化工艺，通过控制 Fe2+和H2O2的投加量，可以产生大量的OH而使小分子羧酸的去除率达到很高的程度。所以，可以得出结论，在影响小分子羧酸去除率的因素中占重要地位的就是工艺中产生OH的数量，而在本次实验条件下，Fenton氧化工艺是产生OH最多的工艺，即为此条件下去除小分子羧酸的最佳工艺。关键词：高级氧化工艺；小分子羧酸；液相色谱I高级氧化工艺去除小分子羧酸的对比研究AbstractAbstract The subject takes the Advanced Treatment method，or Advanced Oxidation Technology (P
4、rocess) to removal of the small molecule carboxylic acids. The liquid chromatograpHy is used to determine the small molecule carboxylic acids. The selecting of the three advanced oxidation process are as follows: ozone oxidation，Fenton oxidation process and pHotocatalytic oxidation process. The targ
5、ets for removal are formic acid，oxalic acid and salicylic acid. By comparing with the various experimental removal processes to determine the merits and select optimal reaction conditions. The result of the experiments proved that the ozone oxidation process is not suitable as a process of removing
6、for the removal of the small molecular carboxylic acid for its removal rate is very low. However，for the reactor containing 500mL small molecule carboxylic acid，the conditions of the experiments are as follows:under the condition of pH=3，H2O2 is added in an amount of 0.36mol，Fe2+ is added in an amou
7、nt of 1mmol and the reaction time is 20min.It makes that the Fenton oxidation process through experiments allowed the removal rate of the small molecules acid reached more than 96%，so the removal efficiency is very prominent；For the pHotocatalytic oxidation process，the choice is UV/H2O2 hypHenated t
8、echniques. In the condition of the reactor containing 500mL small molecule carboxylic acid，the initial reaction pH = 4，H2O2 addition is 0.48mol and the reaction time is 40min，the removal rate can up to 60% or more and the effect of the removal is obvioused very good. However，comparing with the Fento
9、n oxidation process，the pHotocatalytic oxidation process is still inadequate. The Advanced oxidation process in oxidative decomposition seems that the OH is the main material of the removal of a small molecule carboxylic，the ability to generate OH is one of the key points with the evolution of the r
10、emoval ability of an advanced oxidation process. Photocatalytic oxidation process at the wavelength of 256nm UV to decompose the H2O2 also that cannot produce enough OH，and thus the function of the removal of the small molecule acids cannot reach the highest；while for Fenton oxidation process，by con
11、trolling the Fe2+ and H2O2 dosage can produce large amounts of OH that leaving the removal rate of the small molecules carboxylic acids into the high levels. Therefore，it can be concluded that the main factor of the removal in the Small molecule carboxylic acid is the production of the OH，and in the
12、 condition of these experiments，Fenton oxidation process is the best process of generating OH，that is，the best process to remove the Small molecule carboxylic acid.Keywords: Advanced oxidation process；Small molecule carboxylic acid；Liquid chromatograpHyII目 录摘要.IAbstract.II1绪 论.11.1选题背景及意义11.2国内外研究现状
13、31.3小分子羧酸对饮用水处理的影响41.3.1小分子羧酸41.3.1.1甲酸51.3.1.2草酸51.3.1.3水杨酸51.3.2小分子羧酸对饮用水处理的影响61.4高级氧化工艺去除小分子羧酸的应用71.4.1 Fenton氧化法81.4.2光催化氧化法91.4.3臭氧氧化法91.5课题研究目的91.4课题实验内容102 实验试剂和方法.112.1 药品与仪器112.1.1实验药品112.1.2实验仪器112.2实验装置材料和方法132.2.1臭氧氧化实验132.2.1.1实验装置132.2.1.2实验材料132.2.1.3实验方法142.2.2 Fenton氧化实验142.2.2.1实验装
14、置142.2.2.2实验材料152.2.2.3实验方法152.2.3光催化氧化实验152.2.3.1实验装置152.2.3.2实验材料162.2.3.3实验方法162.3实验结果的检测方法172.3.1甲酸标准曲线的测定错误!未定义书签。2.3.2草酸标准曲线的测定错误!未定义书签。2.3.3水杨酸标准曲线的测定203 高级氧化工艺去除小分子羧酸的对比.223.1 臭氧氧化实验223.2 Fenton氧化实验233.2.1 Fe2+投加量对去除率的影响243.2.2 H2O2投加量对去除率的影响253.2.3 溶液初始PH值对投加量对去除率的影响253.2.4 反应时间对去除率的影响263.2.5 小结273.3 光催化氧化（UV/H2O2）实验273.3.1 不同反应体系对去除率的影响283.3.2 不同H2O2浓度对去除率的影响283.3.3 不同反应初始PH对去除率的影响303.3.4 小结314 结 论32参考文献. 33致谢.35351 绪论1.1 选题背景及意义水是生命之源，是人民生活和社会生产最重要的基本资源之一，水资源与人类的各方各面息息相关，而水资源的状况直接影响着经济社会发展和人民生活水平的提高。联合国世界水资源综合评估报告强烈指出，水资源问题将严重制约21世纪全球的经济与社会发展，并可能导致国家间的冲突1。由此
