三元复合驱污水的光催化处理

发布时间：2018-03-06 10:49

本文选题：三元复合驱污水　切入点：纳米光催化剂　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：三元复合驱是一项有效的提高采收率技术,已经从室内实验、现场试验发展到了推广应用阶段。但三元复合驱采出污水中残留的大量聚合物、表面活性剂,直接排放将会污染环境,急需将这些污水进行处理。用常规的方法处理三元复合驱污水或效果不甚理想,或能耗高,因此探索新的处理方法是十分必要的。光催化是一种绿色环保经济的新型污水处理技术,应用将越来越广泛,本文提出采用光催化方法处理三元复合驱污水。本文采用溶胶凝胶法合成了纳米二氧化钛,并通过掺杂金属离子对纳米二氧化钛进行改性,以制备出的改性纳米二氧化钛为光催化剂对聚丙烯酰胺和十二烷基苯磺酸钠进行光催化降解,对影响光催化性能的因素进行探究。研究表明:溶胶凝胶法适合在酸性条件下进行,搅拌混合最宜时间为1h,煅烧最宜时间为5h;纳米二氧化钛的光催化效果明显,经掺杂改性后光催化效果加强,其中掺杂钨0.3%二氧化钛的光催化对表面活性剂和聚合物的降解效果均最好;光催化反应效果良好的必要条件是有光照和加入光催化剂;光照射最佳距离10cm;最佳降解pH环境为pH=3;降解聚合物、表面活性剂最佳投入量分别为1.20%、0.11%;单一降解聚合物和表面活性剂的降解率分别为74.32%、78.83%;通过干扰实验证明两者可同时降解相互影响不大;同时降解两者时,聚合物、表面活性剂的降解率分别为76.80%、71.43%;同时降解现场三元复合驱污水中聚合物和表面活性剂(石油磺酸盐),平均降解率分别达到了65.72%和61.23%。
[Abstract]:ASP flooding is an effective technology to improve oil recovery. It has developed from laboratory experiments and field tests to the stage of popularization and application. However, a large number of residual polymers, surfactants, and surfactants have been produced by ASP flooding. Direct discharge will pollute the environment, and there is an urgent need to treat the sewage. Therefore, it is very necessary to explore new treatment methods. Photocatalysis is a new type of environmental protection and economic sewage treatment technology, which will be used more and more widely. In this paper, the photocatalytic treatment of ternary composite flooding wastewater was proposed. In this paper, nanometer titanium dioxide was synthesized by sol-gel method and modified by doping metal ions. The photocatalytic degradation of polyacrylamide and sodium 12 alkylbenzenesulfonate was carried out using the modified nano-TiO _ 2 as photocatalyst. The factors affecting the photocatalytic properties were investigated. The results showed that the sol-gel method was suitable for acidic conditions, the optimum mixing time was 1 h, the optimal calcination time was 5 h, and the photocatalytic effect of nano-TiO _ 2 was obvious. After doping, the photocatalytic effect was enhanced, and the photocatalytic effect of doped tungsten 0.3% TIO _ 2 was the best for both surfactants and polymers, and the necessary conditions for the good photocatalytic reaction were illumination and addition of photocatalyst. The best range of light irradiation is 10 cm, the best degradation pH environment is pH 3, the degradation of polymer, The optimum amount of surfactant input was 1.20 and 0.11 respectively; the degradation rates of single degradable polymer and surfactant were 74.32 and 78.833, respectively. The interference experiments showed that the two could degrade each other little at the same time, and when the two were degraded at the same time, the degradation rate of the polymer was 74.32 and 78.833.When the two polymers were degraded at the same time, The degradation rates of surfactants were 76.80 and 71.43, respectively, and the average degradation rates of polymer and surfactant (petroleum sulfonate) were 65.72% and 61.23, respectively.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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