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National Repository of Grey Literature 1 records found  Search took 0.02 seconds. 
Combination of different drinking water disinfection processes and their impact on the formation of disinfection by-products
 Česká, Pavlína ; Načeradská, Jana (advisor) ; Fialová, Kateřina (referee)
Combining disinfection processes with chlorination can alter the formation and resulting spectrum of Disinfection By-Products (DBPs) in drinking water. While considerable attention has been given to DBPs formed during chlorination, DBPs formed during the application of multiple disinfection processes are a significantly less explored group. This study focuses on three most common disinfection combinations: chlorination-UV, UV-secondary chlorination, and ozonation-secondary chlorination. After chlorination, trihalomethanes (THMs) and haloacetic acids (HAAs) are the most commonly found DBPs in water. The resulting formation of DBPs is influenced by many factors. UV radiation at typical disinfection doses (40-186 mJ.cm-2 ) does not affect the formation of these two groups of compounds after treatment with UV radiation and secondary chlorination. During the advanced oxidation process (AOP) of chlorination-UV, generally more DBPs are formed than during chlorination alone. However, this can be partially minimized by adjusting the appropriate wavelength and pH of the treated water. For waters containing nitrogenous compounds or bromide, combining chlorination with UV radiation and chlorination with ozonation leads to higher formation of hazardous nitrogenous and brominated DBPs compared to chlorination...
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See also: similar author names
4 Češka, Pavel
6 Češka, Petr
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