標題: | Enhancement of decomposition of 2-chlorophenol with ultrasound/H2O2 process |
作者: | Lin, JG Chang, CN Wu, JR Ma, YS 環境工程研究所 Institute of Environmental Engineering |
關鍵字: | catalyst;2-chlorophenol;decomposition;ionic strength;pH;pseudo-first-order kinetics;TOC removal;ultrasound H2O2 process |
公開日期: | 1996 |
摘要: | We investigated the effects of pH, ionic strength, catalyst, and initial concentration on both decomposition of 2-chlorophenol (2-cp) and removal of total organic carbon (TOC) in aqueous solution with ultrasonic amplitude 120 mu m and H2O2 (200 mg/l). When the initial concentrations of 2-cp was 100 mg/l and the pH was controlled at 3, the rate of 2-cp decomposition was enhanced up to 6.6-fold and TOC removal up td 9.8-fold over pH controlled at 11. At pH 3, the efficiency of decomposition of 2-cp was 99% but the removal of TOC was only 63%; a similar situation applied at pH 7 and 11. Hence intermediate compounds were produced and 2-cp was not completely mineralized. When the concentration of ionic strength was increased from 0.001 to 0.1 M, the rate of 2-cp decomposition was enhanced only 0.3-fold, whereas the TOC removal was not enhanced. In comparison of the effects of pH and ionic strength, pH had greater influence on both 2-cp decomposition and TOC removal than ionic strength. The effect of a catalyst (FeSO4) on decomposition of 2-cp was insignificant comparing with direct addition of H2O2 The reaction rate at a smaller initial concentration of 2-cp (10 mg/l) was more rapid than at a greater one (100 mg/l). The rate of 2-cp decomposition and TOC removal appeared to follow pseudo-first-order reaction kinetics. Copyright (C) 1996 IAWQ. Published by Elsevier Science Ltd. |
URI: | http://hdl.handle.net/11536/1531 http://dx.doi.org/10.1016/S0273-1223(96)00785-8 |
ISSN: | 0273-1223 |
DOI: | 10.1016/S0273-1223(96)00785-8 |
期刊: | WATER SCIENCE AND TECHNOLOGY |
Volume: | 34 |
Issue: | 9 |
起始頁: | 41 |
結束頁: | 48 |
顯示於類別: | 會議論文 |