2011-08-012024-05-13https://scholars.lib.ntu.edu.tw/handle/123456789/650088摘要：本計畫主要目的在探討水中新興消毒副產物nitrosamines（亞硝胺）之前質特性、生成機制及控制技術。整體研究架構以nitrosodimethylamine(NDMA)為代表性新興消毒副產物，並選擇nitrosamines 之潛在前質（不同有機氮化合物）作為研究對象，探討不同有機氮（DON）前質在不同條件下生成NDMA 及其他nitrosamines 化合物之特性。研究期間亦將針對污水處理廠放流水中有機物成分加以分析，探討其中DON 之特性及其對nitrosamines 生成之貢獻。除分析因不同有機前質及家庭污水污染所導致飲用水中新興消毒副產物之生成特性外，並探討新興消毒副產物及其前質之處理技術。本計畫分三年執行，各年執行重心如下：第一年： 針對水中不同DON 前質之nitrosamines 生成潛能進行測試，並與污水處理放流水中DON 前質之試驗結果相互比較。污水處理廠放流水將以樹脂管柱分離方式依其親疏水性及酸鹼特性區分為不同類別之有機前質。生成潛能試驗將在不同條件下進行以評估不同條件之影響。第二年： 比較前氧化處理（包括氯、二氧化氯、氯氨及臭氧）對不同DON 前質之影響，探討淨水廠前氧化處理對DON 前質之氧化效果，評估前氧化後代表性DON前質之變化情形，並分析主要NDMA 前質dimethylamine(DMA)之生成情形。DMA 之分析有助於瞭解DON 前質在氧化過程中生成NDMA 之機制。第三年： 以高級氧化處理（包括O3 及UV/H2O2）對水中DON 前質之去除效能加以探討。除比較AOP 對水中DOC 及DON 之氧化效率、機制及DBP 生成差異外，並將以標準化DBPFP 比較不同有機前質於AOP 處理前後，NDMA 與傳統THM、HAA 生成及處理效能之異同。<br> Abstract: This study intends to assess the correlations between the precursors’characteristics andthe formation of nitrosamines in drinking water. The available technologies for control ofnitrosamines and their precursors in drinking treatment processes will also be evaluated.Nitrosodimethylamine (NDMA) is selected as the target compounds to represent theformation of nitrosamines in drinking water; however, the other eight nitrosamines will beanalyzed. Selected organic nitrogen precursors with various structures and functional groupswill be used to assess their reactivity with chlorine or chloroamine to form nitrosamines.In addition to the selected precursors, treated effluents from Wastewater Treatment Plantwill be used to represent the treated domestic wastewater to evaluate the impacts of effluentorganic matter on formation of nitrosamines after disinfection. The treated effluent will beseparated into different organic fractions by resins and the reactivity of each fraction withdisinfectants will be evaluated. The formation of emerging disinfection byproducts fromreactions between various organic nitrogen precursors and chlorine and chloroamine will beassessed. The control of organic nitrogen precursors in raw water and treatment technologyfor nitrosamines in finished water will be evaluated in this study.This study will be a three-year project:The 1st year –The nitrosamines formation potential of selected organic precursors anddifferent organic fractions from treated effluents will be measured underdifferent experimental conditions to identify precursors with high nitrosaminesformation potential. The results from selected precursors with specificstructure will be compared with the results conducted with different portion oftreated effluents.The 2nd year –The selected organic precursors will be treated with pre-oxidants (chlorine,chlorine dioxide, chloroamine, and ozone) to assess the effects of preoxidationon the organic nitrogen precursors. Both the NDMA and DMA will bemonitored to elucidate the formation of NDMA during the preoxidationtreatments. The profiles of DMA concentrations during the preoxidationtreatment will be helpful to understand the mechanism of NDMA formation.The 3rd year –Based on the results obtained from the 1st and 2nd year projects, the treatmentefficiency of advanced oxidation processes (AOPs) for control of nitrosaminesand their precursors will be evaluated. The UV/ H2O2 and ozonation will beused for oxidation of C- and N-organic precursors and nitrosamines in water.The degradation mechanism will be studied by measuring the changes offunctional groups and organic composition (DOC and DON) in degradationprocesses. Standardized DBPFP will be measured to assess the treatmentefficiency for control of THM, HAA and nitrosamines precursors in raw water.含氮前質DiltiazemDMAPMADMA亞硝胺一氯氨消毒副產物.Nitrogenous precursorsDiltiazemDMAPMADMANDMAmonochloramine.