【作者】 杨光辉；

【导师】 赵旭；

【作者基本信息】 吉林大学 ， 化学工程（专业学位）， 2016， 硕士

【摘要】 在我国,水资源短缺已成为制约社会和经济发展的重要因素,因此应用好造纸废水治理技术、解决好造纸废水的治理问题,是造纸行业健康发展和生态环境保护的迫切需求,也是我国社会、经济可持续发展的必然要求。TiO₂作为一种优良的光催化剂,可以催化降解工业生产中的多类废水（包括造纸废水）,现已成为催化剂领域的研究热点。通过纳米材料与TiO₂复合形成新型光催化剂,能够改善单一TiO₂作为光催化剂存在的缺陷,发挥纳米材料与TiO₂各自优点,从而增强催化剂的光催化性能成为一个重要研究方向。本文首先对造纸废水的污染现状及造纸废水的水质情况做了简要分析,因为造纸废水的排水量大,污染物成分复杂,当前我国乃至世界的造纸废水污染物处理情况都不容乐观,亟待在造纸废水处理技术上出现突破。其次阐述了造纸废水传统处理工艺及研究现状,对传统处理工艺优缺点、应用范围和发展前景做了分析介绍。再次,介绍了造纸废水处理新技术和发展新趋势,而利用半导体对造纸废水有机物进行光催化降解就是其中一项具有发展前景的新技术。论文研究的主要内容即TiO₂-C掺杂金属离子复合催化剂光催化处理造纸废水,因此最后在文中对TiO₂光催化性能、光催化作用机理、与其它纳米材料的复合、载体的选择以及利用TiO₂光催化处理造纸废水的研究现状和前景做了比较全面的论述。本论文的目的是探讨TiO₂-C掺杂金属离子复合材料光催化降解造纸废水的可行性,实验即是围绕这一目的进行设计的。通过实验制得含量为2%、1%、0.5%、的Fe掺杂C-TiO₂催化剂和Sn掺杂C-TiO₂催化剂,然后用不同含量的Fe、Sn掺杂C-TiO₂催化剂对造纸废水进行光催化降解。这些研究均在常温条件进行,操作方法简单,实验成本低廉,对工业化生产金属掺杂C-TiO₂催化剂有一定指导意义。实验利用紫外光分光光度法对不同含量的Fe、Sn掺杂C-TiO₂催化剂催化降解造纸废水溶液进行定量分析,并与纯造纸废水进行对比,发现当Fe的掺杂比在0.5%时降解效果达到最佳,当Sn的掺杂比在0.5%时降解效果达到最佳。对光Fe掺杂和Sn掺杂C-TiO₂进行了XRD测试,发现我们制得2种金属掺杂C-TiO₂催化剂均为锐钛矿型二氧化钛。对各含量的Fe掺杂和Sn掺杂C-TiO₂进行了扫描电镜测试,发现随着掺杂比例的上升颜色及结构的变化。更多还原

【Abstract】 In domestic areas, water shortage has been one of the most important factors which restrict social and economic development. Therefore, the application of papermaking wastewater treatment technology to solve the problem is not only an urgent demand for the healthy development of papermaking industry and the protection of ecological environment, but also the inevitable requirement of sustainable development of China’s society and economy. Tio2, as an excellent photocatalyst, could catalyze the degradation of many kinds of wastewater（including papermaking wastewater） in industrial production, and has already become a hotspot in the field of catalysts. It will be an important research direction that using composited TiO₂ and namo-materials as new photocatalyst could improve the defects which exist when using single TiO₂ as photocatalyst, playing the advantages of both namo-materials and TiO₂, and enhancing photocatalytic performance of the photocatalysts.This paper, firstly, makes a brief analysis on the papermaking wastewater pollution current situation and its water quality situation. Since papermaking wastewater discharge is large, the pollutant composition is complex, and its treatment in current China, even the whole world is not optimistic, so the breakthrough on the papermaking wastewater treatment technology is badly needed. Secondly, this paper describes the traditional treatment technology and research situation, making an analysis and introduction of the advantages and disadvantages, application scope and development prospect of the traditional treatment technology. Thirdly, this paper introduces new papermaking wastewater treatment technology and new development trend, where using semiconductor to make photocatalytic degradation for the papermaking wastewater organic matter is one of the new technologies which has the bright development prospect. The main content of this paper is to study photocatalytic treatment of papermaking wastewater by using TiO₂-C doped metal ion composite catalyst. So in the final text on the photocatalytic performance of TiO₂, the photocatalytic mechanism of nano materials, and other composite, the choice of the carrier and the use of TiO₂ photocatalytic treatment of papermaking wastewaterresearch status quo and prospect was discussed comprehensively.This paper aims at the feasibility analysis of papermaking wastewater treatment by TiO₂-C with metal ion composite material, which the test is designed accordingly.In the test, the Fe & Sn doped C-TiO₂ catalyst is prepared at the content of 2%, 1%,0.5%, Then apply photocatalytic degradation on papermaking wastewater using Fe &Sn doped C-TiO₂ catalysts in different contents. These studies are carried out at room temperature conditions, operation method is simple, and test cost is low, having some guiding significance for the industrial production of C-TiO₂ catalyst doped with metal.The ultraviolet spectrophotometry is used to make quantitative analysis on photocatalytic degradation of papermaking wastewater by Fe&Sn doped C-TiO₂ catalyst in different contents. Compared with the original papermaking wastewater, it is noticed that the degradation performance achieved the best when Fe-doped ratio is0.5% and Sn-doped ratio is 0.5%, respectively. Making XRD test for the Fe-doped and Sn-doped C-TiO₂ catalysts which has the best photodegradation effect, it is found that the 2 kinds of metal doped C-TiO₂ catalysts are both anatase type titanium dioxide. SEM test for the Fe-doped and Sn-doped C-TiO₂ catalysts in different contents have been made, it is found that with increasing of the doping ratio, the change of color and structure appears.更多还原