摘要粉尘是冶金行业的副产物之一，产量巨大，一般的堆放和填埋对环境造成污染。 然而冶金粉尘中含有丰富的碳及多种金属氧化物，回收再利用的价值极高。为此，本 课题通过以天工电炉粉尘为光催化剂对孔雀石绿降解的研究，为光催化处理孔雀石绿 的实际应用提供了一定的理论基础。83550
在本文中，首先探讨了天工电炉粉尘对孔雀石绿的暗室吸附行为；之后研究了在 太阳光及紫外光的照射下，孔雀石绿溶液初始浓度、pH、粉尘热处理温度和粉尘加 入量对催化降解效能的影响，并对降解反应进行了动力学分析。结果表明，在无光照 条件下，粉尘样品对孔雀石绿有着较为明显的吸附效果，反应时间 2 小时，吸附率达 到 73。5%。相较于紫外光，太阳光照射下孔雀石绿降解率更高，且以原粉为光催化剂 时的降解效果最佳。孔雀石绿溶液初始浓度为 50mg/L，粉尘添加量为 1g/L，反应 2。5 小时，孔雀石绿降解率达到 83。5%；对实验结果进行的动力学分析，符合准一级动力 学方程，反应速率常数为 0。8301h-1。
毕业论文关键词：冶金粉尘；光催化；孔雀石绿；动力学
Abstract Dust is one of the byproducts of the metallurgical industry。 It has huge production。 The general stacking and landfill pollute the environment。 However, metallurgical dust has high recycling value reuse because it contains rich carbon and a variety of metal oxides。 So, the subject through research EAF dust of Tiangong as a photocatalyst for the degradation of malachite green for the practical application of malachite green photocatalytic treatment providing a theoretical basis。
In this paper, I discussed the Tiangong’s EAF dust adsorption behavior of malachite green in darkroom at first。 Then, under the irradiation of sunlight and ultraviolet light, I studys the malachite green solution initial concentration, pH, the heat treatment temperature of dust and dust addition on the catalytic performance degradation, and the degradation reaction kinetics were analyzed。 In the absence of light, the dust samples has a more significant effect of adsorption on malachite green, reaction time of 2 hours and the adsorption rate of 73。5%。 Compared to UV light, the rate of degradation of Malachite Green is higher under sunlight, and the degradation of the original powder is the best。 The initial concentration of malachite green solution is 50mg / L, dust dosage is 1g / L, reaction time of 2。5 hours, the degradation rate of malachite green is 83。5%。 Kinetic analysis of experimental results, it in line with the quasi first-order kinetics and the rate constant of
reaction is 0。8301h-1。
Keywords: Metallurgical dust; photocatalytic; malachite green; dynamics
目录
第一章 绪论 1
1。1 孔雀石绿废水 1
1。1。1 孔雀石绿废水概述 1
1。1。2 孔雀石绿废水处理方法 2
1。2 光催化法 3
1。2。1 光催化法概述 3
1。2。2 光催化剂 4
1。2。3 光催化反应速率的影响因素 5
1。3 冶金粉尘概述 6
1。4 研究目的和意义 8
1。5 研究内容 8
第二章 天工电炉粉尘对孔雀石绿的光催化降解性能研究 9
2。1 实验仪器及试剂 9
2。2 样品制备及试剂配制 天工电炉粉尘降解孔雀石绿的效能研究:http://www.youerw.com/huaxue/lunwen_98569.html