有机污染物臭氧氧化反应动力学研究  

Kinetics of ozonation degradation of organic pollutants

作　　者：唐庆丽[1] 郭卫民[1] 申哲民[1] 王文华[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《计算机与应用化学》2013年第5期507-510,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(21177083);上海交通大学无锡研究院资助项目(2011JDZX019)

摘　　要：臭氧氧化是一种应用普遍的高效污水处理工艺。本文实验研究了硝基苯、苯胺、1,10-菲啰啉、邻氯苯酚、对二甲氨基苯甲醛、苯磺酸、对氨基苯磺酸、3-苯丙酸、亚甲基蓝、罗丹明B、间甲酚紫和苯酚等12种有机污染物化合物的臭氧氧化降解规律,探讨了有机物污染物臭氧(O_3)氧化降解的反应动力学特征。实验结果表明:在连续通入1 h24 mg·L^(-1)·min^(-1)的O_3之后,TOC去除率在碱性条件下明显优于酸性和中性条件,在酸性和中性条件下去除率介于10%～50%之间,而在碱性条件下,去除率基本介于35%～50%之间,初始反应过程符合一级动力学反应。12种有机物O_3氧化降解的平均动力学速率常数K_(TOC)在酸性、中性和碱性条件下分别为0.024±0.013、0.024±0.014和0.032±0.015,TOC降解速率在碱性条件下较酸性条件下和中性条件下提高了67%:在相同的pH条件下,不同物质的降解速率也有明显的差异,但是各种物质降解速率趋势变化不大,3个pH下,苯磺酸、3-苯丙酸和1,10-菲啰啉降解得最慢,总体降解趋势与pH和物质的本身结构呈现出很大的相关性。Kinetics of ozonation degradation of 12 organic pollutants were investigated, which were Nitrobenzene, Aniline, 1,10- Phenanthroline monohydrate, O-chlorophenol, P-dimethylaminobenzaldehyde, Benzenesulfonic acid, Hydrocinnamic acid, P-aminobenzene sulfonic acid, Methylene Blue trihydrate, Rhodamine B, M-Cresol purple and Phenol. It was shown by the results that after continuously infusing 24mg·L^-1·min^- of 03 into the organic solution about lh, the TOC removal ratio in the basic conditions had an advantage over in the acidic and in the neutral conditions. In acidic and neutral conditions, the TOC removal ratios were between 10%-50%, however, in the basic conditions between 35%-50%. And the initial reaction process was in accordance with the first-order kinetic reaction equation. In the acidic condition, the neutral condition and the basic condition, the average reaction ratio constants （KTOC） of 12 kinds of materials were 0.024±0.013, 0.024±0.014 and 0.032±0.015 respectively. It was shown that under different pH values, the degradation rate was different, and the KTOC in the basic condition was raised by 67% than in the acid conditions, and the neutral conditions; in the same pH condition, the degradation rate of different substances was different, but the trend of the degradation rate of the 12 substances was similar. In three pH cases, the degradation rate of Benzenesulfonic acid, Hydrocinnamic acid and 1,10-Phenanthroline monohydrate were the slowest. The tendency of degradation presented a great correlation with pH values and the structure of the substances.

关 键 词：臭氧氧化 反应动力学 TOC去除率 有机污染物 

分 类 号：TQ015.9[化学工程] O6-39[理学—化学]