摘要水体中总磷含量过高会造成水体富营养化，造成水质变坏，有效地检测并控制环境水体中的总磷含量显得非常有意义。纳米TiO2作为运用最为广泛的催化氧化反应容器，具有稳定性好、廉价无毒、强氧化还原能力等优点被越来越多地应用于环境水质的分析和检测中。本文对总磷的消解方法、测定原理、测定的影响因素、干扰及其消除方法作了一个详细的介绍，重点介绍光催化氧化法降解有机磷及总磷测定。47799

毕业论文关键词：有机磷降解、光催化氧化、总磷测定

ABSTRACT

High levels of total phosphorus in water can cause eutrophication, resulting in deterioration in water quality, effectively detect and control the phosphorus content of environmental water is very meaningful. nm-TiO2 as the most widely used catalytic oxidation reaction vessel, with good stability, cheap, non-toxic, strong redox ability, etc. are increasingly being applied to the analysis and testing of water quality in the environment. In this paper, total phosphorus digestion methods, measurement principle, the determination of factors, interference and its elimination method were presented in detail, focusing on the photocatalytic degradation of organic phosphorus and total phosphorus determination.

Keywords: Organophosphate, Photocatalytic oxidation, degradation, Determination of Total phosphorus

目录

1 引言 4

2 消解方法 5

2.1 碱熔法 5

2.2 微波消解法 6

2.2.1 微波诱导的原理 6

2.2.2 微波溶样的优缺点 6

2.3 硝酸-高氯酸消解 6

2.4 过硫酸钾消解法 7

2.5 纳米TiO2-光催化法 7

2.5.1 光催化氧化法降解有机物及其优点 8

2.5.2 光催化氧化的基本原理 8

2.5.3 UV/Ti02光催化剂的制备 9

2.5.4 光催化氧化的影响因素 10

3 总磷的测定方法 13

3.1 钼酸铵分光光度法 13

3.1.1 方法原理 13

3.1.2 干扰及消除 13

3.1.3 方法的适用范围 14

3.2 氯化亚锡还原光度法 14

3.2.1 方法原理 14

3.2.2 干扰及消除 14

3.2.3 方法的适用范围 15

3.3 离子色谱法