论文总字数：15160字

摘 要

黑臭水体的影响日益加深，臭氧是能处理黑臭水体的一种方法。本课题介绍了臭氧的性质、机理。制备和应用。讨论了一些臭氧组合工艺如臭氧/紫外光，以及非均相臭氧催化技术。介绍了纳米二氧化钛和三种常用的载体如陶粒、活性炭和三氧化二铝的性能。

对陶粒进行了表面改性，并对改性后的陶粒和活性炭、三氧化二铝负载了二氧化钛。对所有催化剂进行了总磷（TP）、氨氮（NH₄ -N）、高锰酸钾盐指数（COD_Mn）的对比，选择出最佳催化剂负载二氧化钛后的三氧化二铝。对该催化剂的最佳接触反应时间、pH值、臭氧投加量进行了讨论，并得出结论，当接触反应时间为35min、臭氧投加量在7mg/L（即臭氧通气时间14min）、pH值为7时，负载了二氧化钛的三氧化二铝的催化效果最佳。

关键词：臭氧 光催化 二氧化钛 催化氧化

Research on ozone used in urban black and smelly water purification

Abstract

The influence of the black and smelly water body is deepening day by day.Ozone is a way to deal with black and smelly water.This topic introduces the nature, mechanism, preparation and application of ozone.Some ozone combined processes such as ozone / ultraviolet light and heterogeneous ozone catalytic technology are discussed. The properties of nano titanium dioxide and three commonly used carriers, such as ceramsite, activated carbon and alumina, are introduced.

Surface modification of ceramsite was carried out，nanoscale titanium dioxide was loaded to surface modified ceramsite and activated carbon and alumina. The total phosphorus (TP), ammonia nitrogen (NH₄ -N) and Potassium Permanganate salt index (COD_Mn) were compared for all catalysts. The best catalyst TiO₂/Al₂O₃ was selected. The contact reaction time, pH value and ozone dosage of the best catalyst were discussed. The conclusion is that when the contact reaction time is 35min and the ozone dosage is 7mg/L（that is, the time of ozone ventilation is 14min）and the pH value is 7, TiO₂/Al₂O₃ has the best catalytic effect.

Key Words: Ozone; Photocatalysis;Titania;Catalytic oxidation

目 录

摘要……………………………………………………………………………………………I

ABSTRACT…………………………………………………………………………………II

第一章 绪论…………………………………………………………………………………1

1.1 引言……………………………………………………………………………………1

1.2臭氧技术介绍………………………………………………………………………1

1.2.1臭氧性质……………………………………………………………………1

1.2.2臭氧氧化机理………………………………………………………………1

1.2.3臭氧的制备与应用…………………………………………………………2

1.2.4臭氧与紫外光技术…………………………………………………………2

1.2.5非均相臭氧催化氧化技术…………………………………………………2

1.2.6 臭氧组合工艺………………………………………………………………3

1.3催化剂的选择使用…………………………………………………………………3

1.3.1纳米二氧化钛介绍…………………………………………………………3

1.3.2载体的选择…………………………………………………………………4

1.4课题的研究意义……………………………………………………………………4

第二章 实验药剂与设备………………………………………………………………5

2.1实验药品……………………………………………………………………………5

2.2实验仪器和设备……………………………………………………………………5

第三章 催化剂的制备…………………………………………………………………7

3.1陶粒表面覆碳改性…………………………………………………………………7

3.2负载催化剂的制备…………………………………………………………………7

第四章 实验结果与讨论……………………………………………………………8

4.1实验装置……………………………………………………………………………8

4.2分析测试方法……………………………………………………………………10

4.3实验结果与讨论…………………………………………………………………10

第五章 最佳实验条件讨论…………………………………………………………12

5.1实验条件对比……………………………………………………………………12

5.1.1反应时间对催化效果的影响……………………………………………12

5.1.2臭氧投加量对催化效果的影响…………………………………………13

5.1.3 pH值对催化效果的影响………………………………………………15

5.1.4小结………………………………………………………………………16

第六章 结论……………………………………………………………………………17

参考文献…………………………………………………………………………………18

致谢………………………………………………………………………………………19

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