Characterization of Dissolved Organic Matter and Its Removal by Coagulation or Activated Carbon Adsorption Processes
|關鍵字:||溶解態有機物;雌激素潛勢;混凝;活性碳;dissolved organic matter;estrogen potential;coagulation;activated carbon||公開日期:||2008||摘要:||本論文討論原水中溶解態有機物之性質與其移除效率。本文首先採集並分析各地水樣中溶解態有機物之分子量分佈、EEM（Excitation-Emission Matrix）圖譜及其他水質基本特性。結果發現不同原水經各國水廠移除等量之DOC（Dissolved Organic Carbon）會具有相似之SEC-UV254面積移除率（Size Exclusion Chromatography-UV254 Area Removal），代表各國原水中對UV254有吸收之物質可能具相似組成。 原水經淨水廠處理後尚殘留許多溶解態有機物，本文嘗試以酵素免疫分析法分析原水及水廠程序水中是否具雌激素潛勢。結果顯示，T-C及T-B淨水廠原水分別在濃縮21300與10800倍下達50% 抑制比，而T-C及T-B淨水廠清水在濃縮倍率53100及32900下也達50%之抑制比，表示兩淨水廠處理程序可部份移除雌激素潛勢。 混凝程序中使用高劑量混凝劑及高強度攪拌條件下，對高分子量之溶解態有機物移除效果較佳，但最高只達56.5% SEC-UV254面積移除率，表示混凝僅能部份移除溶解態有機物。 使用粉狀活性碳則除了1000-2000 Da物質外，其對原水中溶解態有機物都有移除效果。在劑量150（mgL-1 as C）下，15分鐘內就能達80% SEC-UV254 面積移除率，代表活性碳比混凝程序具有較佳之溶解態有機物移除率。
The properties and removal of dissolved organic matter（DOM） in drinking water was studied in this thesis. The water samples collected from the world were analyzed by SEC（size exclusion chromatography）、EEM（excitation-emission matrix）and some basic analysis. We hoped to generalize relation between the characterization and its source by this analysis. The results showed that the DOC and SEC-UV254 area had similar removal efficienccy in all samples. It represented that the composition of DOM must be similar no matter where the water sample came from There are still many residual DOM in the drinking water today. In order to test the estrogen potential of raw water and treatment water , we use ELISA（Enzyme-Linked ImmunoSorbent Assay） to analyze. The results showed that the raw water of T-C and T-B WTP（Water Treatment Plant）reached 50% inhibition ratio after concentrating 21300 and 10800 times. The clean water of T-C and T-B WTP reached 50% inhibition ratio after concentrating 53100 and 32900 times. The treatment process can removal parts of estrogen potential. Different operation processes and coagulant dosage were tested for improving the removal efficiency of DOM. It had better removal efficiency by higher dosage of coagulant and higher strength of mixing. The maximum SEC-UV254 removal is 56.5% by coagulant. It meat that coagulation process just can removal part of the DOM. Powdered activated carbon（PAC） was used to improve the removal of the dissolved organic matter. All the powdered activated carbon added in the raw water was effective in removing the dissolved organic matter in except for 1000-2000 Da molecule. The SEC-UV254 removal reached to 80% in 15 minutes by dosing 150（mgL-1 as C）PAC. It suggested that PAC adsorption was more efficient to remove DOM than coagulation process.
在 IR 系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。