Hydroxyl radical/ozone ratios during ozonation processes. II. The effect of temperature, pH, alkalinity, and DOM properties

被引：285
|
作者：
Elovitz, MS
von Gunten, U
Kaiser, HP
机构：
[1] US EPA, Treatment Technol Evaluat Branch, Water Supply & Water Resources Div, NRMRL, Cincinnati, OH 45268 USA
[2] Swiss Fed Inst Environm Sci & Technol, EAWAG, CH-8600 Dubendorf, Switzerland
[3] Zurich Water Works Wasserversorgung, CH-8023 Zurich, Switzerland
来源：
OZONE-SCIENCE & ENGINEERING | 2000年 / 22卷 / 02期
关键词：
ozone; hydroxyl radical; R-cl; drinking water treatment; oxidation; disinfection; water quality; pH effect; temperature effect; alkalinity effect; DOM; Lake Zurich water;
D O I：
10.1080/01919510008547216
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The influence of temperature, pH, alkalinity, and type and concentration of the dissolved organic matter (DOM) on the rate of ozone (O-3) decomposition, O-3-exposure, . OH-exposure and the ratio R-ct of the concentrations of . OH and O-3 has been studied. For a standardized single ozone dose of 1 mg/L in all experiments, considerable variations in O-3-exposure and . OH-exposure were found. This has important implications for water treatment plants regarding the efficiency of oxidation and disinfection by O-3. In oligotrophic surface waters and groundwaters, minimal calibration experiments are needed to model and control the ozonation process, whereas in eutrophic surface waters more frequent measurements of O-3 kinetics and R-ct values are required to evaluate seasonal variations.
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收藏
页码：123 / 150
页数：28
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