Continuous ozonation of polycyclic aromatic hydrocarbons in oil/water-emulsions and biodegradation of oxidation products

被引：19
|
作者：
Kornmüller, A
Wiesmann, U
机构：
[1] Tech Univ Berlin, Sonderforsch Bereich 193, D-10623 Berlin, Germany
[2] Tech Univ Berlin, Inst Chem Engn, D-10623 Berlin, Germany
来源：
WATER SCIENCE AND TECHNOLOGY | 1999年 / 40卷 / 4-5期
关键词：
continuous ozonation; biodegradation; dodecane; oil/water-emulsion; oxidation products; polycyclic aromatic hydrocarbons (PAH);
D O I：
10.1016/S0273-1223(99)00491-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The continuous ozonation of polycyclic aromatic hydrocarbons (PAH) was studied in a two stage ozonation system followed by aerobic biological degradation. The highly condensed PAH benzo(e)pyrene and benzo(k)fluoranthene were oxidized selectively in synthetic oil/water-emulsions. The influence of the ozone mass transfer gas-liquid on the reaction rate of benzo(k)fluoranthene was studied for process optimization. The dissolved ozone concentration is influenced by temperature to a higher degree than the reaction rate of PAH. In dependence on pH, PAH oxidation occurs by a direct reaction with ozone inside the oil droplets. Two main ozonation products of benzo(e)pyrene were quantified at different retention times during ozonation and their transformation could be shown in the biological treatment step. (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：107 / 114
页数：8
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