臭氧化小分子有機前質對消毒副產物生成的影響

Effect of Ozonation of Low-MW Organic Precursors on DBP Formation

李易書(I-Shu Li)

指導教授 ： 蔣本基

國立臺灣大學/工學院/環境工程學研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.02525

摘要

無資料

關鍵字

小分子有機前質 ； 氫氧自由基 ； 消毒副產物生成潛勢 ； 臭氧化/氯化 ； 臭氧/紫外光

並列摘要

The objective in this investigation is intended to evaluate the effect of ozonation of low molecular weight precursors on DBP formation. In conventional water treatment process, high molecule weight compounds such as humic substances could be removed significantly by the enhanced coagulation. However, other low molecule weight compounds, i.e., resorcinol, phloroglucinol, and p-hydroxybenzoic acid, couldn’t be removed and exhibit high DBP formation potential (DBPFP). Therefore, the introduction of ozonation / chlorination processes to water treatment plant introduced to investigate the effect of DBP formation.
The results of the investigation reveal that destruction of organic precursors by hydroxyl radical exhibits higher DBP formation. In the O3/UV process, the greater amount of hydroxyl radical exposure results in more reduction of DBP. Furthermore, the other harmful by-products such as aldehyde formation also focused on the investigation because of its carcinogenic character. In the comparison of risk assessment between ozonation and coagulation, the ozonation/chlorination processes decrease the carcinogenic risk of finished water.
A new model proposed by Chang can fit the chlorine decay and DBP formation data quite well. Adding parameters of pH and alkalinity to the Chang model can predict the chlorine decay and DBP formation data more accurately.

並列關鍵字

Low molecular weight organic precurso ； hydroxyl radical ； DBPFP ； ozonation/chlorination ； O3/UV process

參考文獻

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