Measurement of the initial phase of ozone decomposition in water and wastewater by means of a continuous quench-flow system: Application to disinfection and pharmaceutical oxidation

被引：183

作者：

Buffle, Marc-Olivier ^{[1
]}

Schumacher, Jochen ^{[2
]}

Salhi, Elisabeth ^{[1
]}

Jekel, Martin ^{[2
]}

von Gunten, Urs ^{[1
]}

机构：

[1] Swiss Fed Inst Environm Sci & Technol EAWAG, Dept Water Resources & Drinking Water, CH-8600 Dubendorf, Switzerland

[2] Tech Univ Berlin, Inst Aquat Engn, Dept Water Control Engn, Berlin, Germany

来源：

WATER RESEARCH | 2006年 / 40卷 / 09期

关键词：

ozone; hydroxyl radicals; AOP; ozone demand; quench-flow system; kinetics; disinfection; pharmaceuticals; wastewater; drinking water;

D O I：

10.1016/j.watres.2006.02.026

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Due to a lack of adequate experimental techniques, the kinetics of the first 20 s of ozone decomposition in natural water and wastewater is still poorly understood. Introducing a continuous quench-flow system (CQFS), measurements starting 350 ms after ozone addition are presented for the first time. Very high HO. to O-3 exposures ratios (R-ct = integral HO(.)dt/integral O(3)dt) reveal that the first 20s of ozonation present oxidation conditions that are similar to ozone-based advanced oxidation processes (AOP). The oxidation of carbamazepine could be accurately modeled using O-3 and HO. exposures measured with CQFS during wastewater ozonation. These results demonstrate the applicability of bench scale determined second-order rate constants for wastewater ozonation. Important degrees of pharmaceutical oxidation and microbial inactivation are predicted, indicating that a significant oxidation potential is available during wastewater ozonation, even when ozone is entirely decomposed in the first 20 s. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1884 / 1894

页数：11

共 34 条

[21] Removal of estrogens in municipal wastewater treatment under aerobic and anaerobic conditions: Consequences for plant optimization [J].