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摘要：Fe0类Fenton技术是一种新型高效的类Fenton技术，其利用Fe0的腐蚀产生Fe2+，然后Fe2+催化H2O2分解产生氧化性极强的·OH，进而氧化降解有机污染物。本论文中选取难降解的偶氮染料金橙I作为目标物，采用Fe0类Fenton技术对其展开降解研究。实验结果表明0.6g/L的金橙I溶液在pH4.0、H2O2浓度为9mmol/L、零价铁粉投加量为0.4g/L的条件下能够被有效降解。此外利用紫外可见分光光度计和pH计对每个时间段反应溶液中铁离子浓度、pH值及金橙I分别进行了分析测定和紫外可见光谱扫描，利用LC-MS对中间产物进行了分析测定，推测在氧化降解的过程中金橙I首先解离为4-羟基萘偶氮对苯磺酸根，然后其生色基团被氧化破坏，反应溶液褪色，生成苯磺酸根、氮气和1，4-萘醌，然后1，4-萘醌进一步氧化为邻苯二甲酸根。58106
毕业论文关键词：零价铁；有机污染物；氧化；降解率；金橙I
Degradation of Orange I by Fe0- Fenton
Abstract：Fe0-Fenton technology is a new type of high efficient Fenton-like technology, which uses the corrosion of Fe0 to produce Fe2+, and then Fe2+ catalytic decomposition of H2O2 to produce highly oxidized ·OH, and then ·OH oxidation degradation of organic pollutants. In this paper, the refractory azo dyes Orange I was selected as the target, and the Fe0-Fenton technology was used to study the degradation of Orange I. The results show that the 0.6g·L-1Orange I can be effectively degraded in pH4.0, hydrogen peroxide concentration 9 mmol·L-1, zero-valent iron concentration of 0.4g·L-1. The iron ion concentration and pH of each time period reaction mixture were determined by the UV-visible spectrophotometer and pH meter. The Orange I of each time period was scanned by the UV-visible spectrophotometer, and intermediate products were determined by LC-MS. It was presumed that the orange I first was dissociated to 4-hydroxy naphthalene azo benzene sulfonic acid, and then the chromophore was oxidative damaged leading to color fading of the reaction solution and generation of benzene sulfonic acid, nitrogen and 1, 4-naphthoquinone, then 1, 4-naphthoquinone was further oxidated to phthalic acid in the oxidative degradation reaction.
Key Words： zero-valent iron; organic pollutant; oxidation; degradation rate; Orange I
目录
第一章 前言 1
1.1 Fe0类Fenton技术 1
1.2 Fe0类Fenton技术的氧化机理 1
1.3 Fe0类Fenton技术的应用 2
1.4 试验目的及意义 2
1.4.1有机污染物的选取 3
1.4.2 研究的目的及意义 3
1.4.3 研究内容 3
第二章 实验部分 4
2.1 实验试剂与设备 4
2.1.1 实验试剂 4
2.1.2 实验设备 4
2.2 实验方法 5
2.3 测定内容及方法 5
2.3.1 金橙I降解率分析 5
2.3.2 金橙I降解动力学分析 5
2.3.3 铁离子浓度分析 6
2.3.4 pH值的测定 6
2.3.5 液质联用测定 6
2.3.6 数据处理 6
第三章 实验结果与分析 6