目录
摘要Ⅱ
关键词Ⅱ
AbstractⅢ
引言
1. 选题背景1
1.1 引言1
1.2 不同水体污染物处理方法1
1.2.1 生活污水处理方法2
1.2.2 重金属污染物处理方法2
1.3 基于零价金属的活化溶解氧除砷技术2
1.4 选题依据2
2. 文献综述3
2.1 国外研究进展3
2.2 国内研究进展3
2.2.1 水体除砷研究进展3
2.2.2 零价金属和活化溶解氧的应用4
2.2.3 国内双金属材料的研究进展4
2.3 课题任务4
3 材料与方案论证5
3.1 微米级锌铜双金属颗粒的合成5
3.2 As（Ⅲ）去除实验5
4. 实验过程与数据5
4.1 mZnCu微米颗粒去除水体中As(Ⅲ)的研究6
4.1.2 mZnCu用量对As(Ⅲ)去除的影响6
4.1.3 溶液pH值对As(Ⅲ)去除的影响7
4.1.4 mZnCu微米颗粒对As(Ⅲ)去除前后材料表征8
4.1.5 mZnCu微米颗粒去除As(Ⅲ)前后XPS谱图分析9
4.1.6 通入氮气对mZnCu去除As(Ⅲ)的影响11
5. 结论与讨论12
5.1 关于实验结果的讨论13
5.2.关于实验过程的讨论13
致谢13
参考文献13
双金属活化溶解氧对As(Ⅲ)的去除研究
摘 要
我国工农业蓬勃发展的同时，我们也关注到了伴随而来的水体污染问题，其中砷污染现象愈发突出，对鱼类和植物的生存环境甚至人类的健康产生了影响。砷酸根和亚砷酸根是砷在水中主要存在形态，水溶性极大，常规处理方法如吸附法存在操作复杂、成本高、处理效率低等问题，因此寻找经济高效的砷离子去除材料和工艺方法显得至关重要。据现有文献已知水中溶解氧结构稳定、氧化能力弱，不足以直接高效氧化去除三价砷（As(III)）。但零价金属在一定条件 *51今日免费论文网|www.51jrft.com +Q: #351916072# 
下可以将溶解氧催化活化从而生成强氧化性的活性氧，实现对目标污染物的高效降解去除。为提高反应活性及效率，本课题拟以一种零价金属表面负载另一种零价过渡金属形成双金属材料的方法提高材料反应活性，运用简单易操作的金属置换反应制备了微米级Zn/Cu双金属材料用以活化溶解氧以高效去除水体中As(III)，对可能影响其效果的因素进行了实验探究，并且针对所制备的双金属材料进行性能调控。本课题结合双金属材料活化溶解氧降解去除目标污染物三价砷离子的效果及所制备材料的稳定性，探索出反应最佳投料比和制备的最佳实验条件，并对获得的锌铜双金属材料进行红外（IR）和XPS扫描表征。
REMOVAL OF AS (Ⅲ) BY DISSOLVED OXYGEN ACTIVATED WITH BIMETAL
ABSTRACT
With the rapid development of industry and agriculture in China, the accompanying water pollution has drawn much attention, especially the increasingly prominent arsenic pollution, which has an impact on the living environment of fish and plants and even human health. Arsenate and arsenite are the main forms of arsenic in water, which have great water solubility. Conventional treatment methods including adsorption, have many problems, such as complex operation, high cost, low treatment efficiency, etc., so it is very important to find an economical and effective arsenic ion removal method and material. According to the existing papers, it is known that the structure of dissolved oxygen in water is stable and the oxidation capacity is weak, which is not enough to directly oxidize and remove As(III). However, the dissolved oxygen can be activated by the zero valent metal to generate strong oxidizing active oxygen, which can realize the efficient degradation of pollutants. In order to improve the activity and efficiency of the reaction, a method of forming bimetallic materials with zero valence transition metal loaded on the surface of one kind of zero valence metal is proposed to improve the activity of the material. The micrometre grade Zn/Cu bimetallic materials are prepared through metal replacement reaction, which is simple and easy to operate, to remove As(III) from water, and the factors that may affect its effect are explored experimentally. The performance of the prepared bimetallic materials was controlled, and combined with the removal effect of trivalent arsenic ion and the stability of the prepared materials, the optimal reaction ratio and experimental conditions were explored. The zinc copper bimetallic materials were characterized by IR and XPS.

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