【作者】 韦江慧；

【导师】 刘自力；

【作者基本信息】 广西大学 ， 化学工艺， 2003， 硕士

【摘要】 糖蜜酒精废水是一种难降解的废水，是广西糖业综合利用中的瓶颈问题。本文以糖蜜酒精的光催化降解为研究对象研究多相光催化剂考察光催化降解的过程，为光催化降解糖蜜酒精废水提供重要的基础数据，具有重要的理论价值和潜在的应用前景，文章通过多种方法合成了一系列催化剂，并与目前最具有代表性的TiO₂光催化剂进行比较。研究发现钨酸铅和钨酸铋对糖蜜酒精废水的降解有很好的活性，并且通过Fe³⁺对钨酸铋进行改性，发现Fe³⁺的加入使得光催化剂的活性得到进一步的改善。通过 XRD、FTIR、TG-DTA 和固体漫反射紫外扫描的方法对催化剂进行表征，发现钨酸铋和钨酸铅催化剂的禁带宽度分别为2.75ev和2.82ev低于TiO₂的3.2ev的禁带宽度，能较好的利用可见见光的能量。研究发现一定量的氧化物组分存在的钨酸铋和钨酸铅是这类催化剂呈现良好的活性的内在因素 文章对糖蜜酒精废水的光催化降解工艺进行了研究，发现催化剂用量、光照时间、H₂O₂的存在、空气的流速、物料的酸碱性等都影响糖蜜酒精废水的光催化降解过程，并进行紫外扫描和质谱分析。糖蜜废水的光催化降解过程是一个复杂的过程，降解过程中荷质比为333 和381的有机分子在光催化降解过程优先降解，所以光催化降解糖蜜酒精废水并非是毫无选择的矿化过程，而是有选择性的降解过程。更多还原

【Abstract】 Molasses-alcoholic wastewater is difficult to degrade, and it is a "bottleneck" problem of comprehensive utilization of sugarcane in sugar industry of GuangXi Zone. In This paper multiphase photocatalyser and its photocatalytic degrading process for molasses-alcoholic \vaste\vatcr by are studied. The fundamental data of photocatalytic degradation for molasses-alcoholic wastewater are given, therefore have important theoretical value and practical perspective.A series of catalyzers were compounded by many methods, and compared their preperties with that of TiO2, a representative photocatalyzer in our paper.Our experiments show that the photocatalyzers PbWO4 and Bi2WO6 are good to degrade molasses-alcoholic wastewater.Bi2WO6, was denatured by adding Fe3+and the improved degration rate was found. By this measure of XRD, FTIR, TG-DTA and DRS to token catalyzers, the result showed that the Eg (eV) of PbWO4 and Bi2WO6are 2.75eV and2.S2eV, these are far lower than that of TiO2 Eg 3.04eV. So photocatalyzers PbWO4 and Bi2WO6 can absorb more energy of visible light. The study discover that some oxides in those catalyzers are the main reasons of catalyzers producing better degradation rate.This paper discover that catalyzer dosage, illumination time, amount of H2O2, velocity of air fluid and pH have some influence on the process of photocatalytic degrading for molasses-alcoholic wastewater. The process is complicated, the organic molecular of e/m 333 and 381 is firstly degraded, and the process is not a unselect process ,but a selective one.更多还原