https://scholars.lib.ntu.edu.tw/handle/123456789/76753
標題: | 以薄膜程序去除水中溶解性有機質之研究(II) USE OF ULTRAFILTRATION FOR REMOVAL OF DISSOLVED ORGANIC MATTER (II) |
作者: | 林正芳 | 關鍵字: | 薄膜技術;中空纖維管;超微過濾;溶解性有機質;膠體過濾層分析;ultrafiltration;gel filtration chromatography;PAC pretreatment;humic acid;and fractionation | 公開日期: | 31-七月-1998 | 出版社: | 臺北市:國立臺灣大學環境工程學研究所 | 摘要: | 本研究以GFC (gel filtration chromatography)及活性碳預處理的方式分離腐植酸,分離後之腐植酸模擬水樣分別進行UF (ultra-filtration)薄膜過濾,探討分子量對薄膜過濾之影響。薄膜系統設計為定進流濃度、迴流(recirculation)及結合活性碳吸附等三種操作方式。 The effect of molecular weight of humic acid on ultrafiltration was examined by feeding solution containing humic acid fractionated from gel filtration chromatography (GFC) and pretreated with powdered activated carbon (PAC) pretreatment. The benchscale UF system was operated in constant humic acid concentration, recirculation, and UF-PAC hybrid modes. By employing GFC method, samples were fractionated into four groups corresponding to the molecular weight ranges: G-1 (6,500~22,600 Da), G-2 (2,200~6,500 Da), G-3 (650~2,200 Da), and G-4 (180~650 Da). The results indicated that the degree of permeate flux decline almost increased with molecular weight under constant concentration and recirculation operation modes. The composition of humic acid changed after PAC pretreatment and caused severe permeates flux decline. GFC examination showed that as PAC dosage increased, the percentage of humic acid in 6,500~22,600 Da fraction increased. The highst molecular weight fration was responsible for the increase in flux decline. Combination of UF and PACadsorption process significantly improved removal efficiency in TOC and THMFP, but impaired the permeate flux. The organic matter remained after PAC adsorption had wide molecular weight range and easy to fouling the membrane. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/22015 | 其他識別: | 872211E002007 | Rights: | 國立臺灣大學環境工程學研究所 |
顯示於: | 環境工程學研究所 |
檔案 | 描述 | 大小 | 格式 | |
---|---|---|---|---|
872211E002007.pdf | 69.09 kB | Adobe PDF | 檢視/開啟 |
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。