USE OF ULTRAFILTRATION FOR REMOVAL OF DISOLVED ORGANIC MATTER (IV)
|作者:||林正芳||公開日期:||31-七月-2000||出版社:||臺北市：國立臺灣大學環境工程學研究所||摘要:||本研究針對腐植酸之官能基特性對於UF 與粉狀活性碳(PAC)預吸附-UF 程序處理效率的影響。
The objective of this work is placed on understanding the role of humic acid’s functional groups on UF and PAC-UF performance. To isolate humic acid fractions bearing carboxylic functional groups from phenolic functional groups, asecondary amine anionic exchanger resin and DEAE anionic resin were employed for this purpose. The secondary amine anionic exchanger resin is able to bind the humic acid fractions with phenolic groups. The DEAE anionic resin can react with the carboxylic group of a humic acid. The isolated humic acid fractions were examined for identifying various functional groups with the use of FTIR and a set of acid-base titration. With these two different resins, carboxyl-containing fractions can be separated from the phenol-containing fractions. The isolated humic acid fractions were subject to the UF performance evaluation in terms of flux and water quality. Two different membrane materials, hydrophobic polysulfone (PS) and hydrophilic regenerated cellulose acetate (CA) were selected for UF experiments in this study. Solutions with carboxylic group dominated humic acids caused the worst flux decline. The situation was adversely affected by the presence of high EC. On the other hand, solutions with phenolic group dominated humic acid exhibited less membrane fouling and were not profoundly affected by the presence of high EC. Membrane flux decline was not improved significantly with the help of PAC in PAC-UF operation. However, the permeate flux of solutions with less carboxyl groups doesn't tend to cause additional flux decline.
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。