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Release Rule of Ammonia Nitrogen from Chloramine Disinfection in Water Supply Distribution System
Author(s): 
Pages: 72-75,96
Year: Issue:  1
Journal: Water Purification Technology

Keyword:  chloraminedisinfectionnitrificationammonia nitrogenrelease;
Abstract: The release rule of ammonia nitrogen from chloramine at different chlorine-to-nitrogen ratio was studied. pH,concentration of organic matter,concentration of nitrite and Fe2+ on release of ammonia nitrogen from chloramine was investigated. The results show that the higher Cl∶N is,the less ammonia nitrogen is released;when Cl∶N is 3∶1,the concentration of ammonia nitrogen released from chloramineis 0. 91 mg/L,when Cl∶N is 5∶1,that is 0. 35 mg/L. to some extent,pH has an impact on the release of ammonia nitrogen from chloramine,the concentration of ammonia nitrogen decreases with pH increasing;organic matter and nitrite has positive effects on the release,the higher the concentration of organic matter and nitrite is,the higher ammonia is released. Fe2+ also can enhance the release.
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