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The Developement of Advanced Oxidation Processes for Direct Degradation of Slowly Biodegradable Organic Matters

直接降解缓慢生物降解有机物的高级氧化工艺的开发

基本信息

批准号：
08455240
负责人：
SOMIYA Isao
金额：
$ 2.5万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455240/
关键词：
Advanced Oxidation Process slowly biodegradable organic matter ozone organochlorine compound

项目摘要

In this study, treatment characteristics and reaction mechanisms of advanced oxidation processes for the direct degradation of humic acid, trichloroethylene (TCE), and 1,1,1-trichloroethane (1,1,1-TCE) were examined.Decoloration process of humic acid by ozonation was described by Michaelis-Menten's formula, whose rate constant of reaction and Michaelis constant were proportional to the rate of ozonation and the initial concentration of humic acid respectively. Ozonation for 30 minutes degraded 91.7% of the initial TCE and none of 1,1,1-TCE.But the ozone-hydrogen peroxide process for 30 minutes could degrade 22.2% of 1,1,1-TCE and the rate constant of reaction of TCE was 1.5 times larger than that with the ozonation process. Ozone-UV process could decolor humic acid solution, furthermore it could decompose 95% of the initial total organic carbon (TOC) with UV intensity not less than 4.7 W.The ratio of decomposed TOC to the initial TOC reached two times larger than that with the ozonation process. This was thought to be caused by oxidative decomposition of organic acids, which was inferred by the transition of pH.The ozone-UV process for 30 minutes could degrade 97.8% of the initial TCE,and 53.2% of the initial 1,1,1-TCE.As a result, it was clarified that the advanced oxidation processes, especially ozone-UV process, were effective to the degradation of slowly biodegradable organic matters.

研究了高级氧化工艺直接降解腐植酸、三氯乙烯（TCE）和1,1,1-三氯乙烷（1,1,1-TCE）的处理特点和反应机理。采用Michaelis- menten公式描述了臭氧氧化对腐植酸的脱色过程，其反应速率常数和Michaelis常数分别与臭氧氧化速率和腐植酸初始浓度成正比。臭氧化30分钟对初始TCE的降解率为91.7%,1,1,1-TCE的降解率为零。臭氧-双氧水处理30 min可降解22.2%的1,1,1-TCE， TCE的反应速率常数是臭氧化处理的1.5倍。臭氧-紫外工艺对腐植酸溶液具有脱色作用，在不小于4.7 W的紫外强度下，可降解95%的初始总有机碳（TOC）。分解TOC与初始TOC之比达到臭氧化处理的2倍。臭氧-紫外处理30分钟可降解初始TCE的97.8%，可降解初始1,1,1-TCE的53.2%。结果表明，高级氧化工艺，特别是臭氧- uv工艺，对降解生物降解缓慢的有机物是有效的。