磷灰石光催化复合材料结构调控及降解黄药废水的实验研究

发布时间：2018-06-17 17:19

本文选题：羟基磷灰石 + 羧甲基纤维素　；参考：《武汉科技大学》2015年硕士论文

【摘要】：黄药是有毒有害物质，具有恶臭的气味，即使选矿废水中含量极少，亦可导致尾矿库周围空气都有异臭，并破坏生态系统平衡。所以，选择一个方便、简洁、经济、快速的方法来处理黄药是一个亟待解决的问题。光催化反应降解法有着方便简洁，反应产物无污染等优点，所以得到广泛的重视。多孔材料制备有多种成熟方法，包括层间化学法、模板合成法、共混法、插层法和层离技术等，其中模板合成技术是制备有序多孔材料的有效手段。该方法可以实现磷灰石多孔材料孔径、壁厚及形貌控制，应用具有重要意义。本研究选取天然磷矿石为原料合成羟基磷灰石，将其作为水处理剂或者载体。为了得到结构和性能可控的羟基磷灰石（HAP），采取了以羧甲基纤维素（CMC）为模板合成HAP，通过CMC复杂的网状结构及其含有的羧基、羟基共同调节HAP的形貌，利用超声振荡调节HAP比表面积以增加HAP表面活性，再将合成的HAP与钛酸丁酯复合制备光催化复合材料，同时改变HAP与钛酸丁酯复合过程中钛酸丁酯的水解速度，，以调节二氧化钛在HAP上的粒度和分布提高复合材料的光催化性能。最后通过其对甲基橙的脱色作用研究其光催化性能，并最终用于黄药的光催化降解。结果表明通过改变CMC添加量可以控制HAP结构及形貌，对于黄药降解效果而言，在CMC添加量为7%，超声振荡5min，Ti/HAP质量比为10%，复合材料焙烧温度为600℃且焙烧6h时可使50mg/L黄药降解率达到99.99%，达到国家地表水排放标准(GB3838-2002)。
[Abstract]:Xanthate is a toxic and harmful substance, with odour odor, even if the concentration of the mineral processing wastewater is very small, it can also cause the odor of the air around the tailings reservoir and destroy the balance of the ecosystem. Therefore, it is an urgent problem to choose a convenient, simple, economical and fast method to deal with xanthate. Clean, the reaction product has no pollution and so on, so it has received extensive attention.
There are many methods of preparation of porous materials, including interlayer chemical method, template synthesis, blending, intercalation and laminating, among which template synthesis is an effective means to prepare ordered porous materials. This method can realize pore size, wall thickness and morphology control of apatite porous materials. The application of this method is of great significance.
In this study, the natural phosphate rock was selected as the raw material to synthesize hydroxyapatite as a water treatment agent or carrier. In order to obtain the hydroxyapatite (HAP) with controllable structure and properties, HAP was synthesized by using carboxymethyl cellulose (CMC) as a template. The morphology of HAP was regulated by the complex network structure of CMC and its carboxyl group and hydroxyl group. The ultrasonic oscillation regulates the surface area of HAP to increase the surface activity of HAP, and then compounded the synthesized HAP with butyl titanate to prepare the photocatalytic composite, and change the hydrolysis rate of butyl titanate in the process of HAP and butyl titanate, in order to adjust the photocatalytic properties of the composite with the size and distribution of titanium dioxide on HAP. Finally, the photocatalytic properties of the composites are obtained. The photocatalytic performance of methyl orange is studied and the photocatalytic degradation of xanthate is finally used. The results show that the structure and morphology of HAP can be controlled by the addition of CMC. For the degradation effect of the xanthate, the addition amount of CMC is 7%, the ultrasonic oscillation 5min, the mass ratio of Ti/HAP is 10%, the calcining temperature of the composite material is 600 and the calcination of 6h. The degradation rate of xanthate 50mg/L can reach 99.99%, reaching the national surface water discharge standard (GB3838-2002).
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X751;O643.36

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