الفهرس 
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Abstract
The formation of disinfection by-products (DBPs) from chlorination of treated drinking waters was determined.
Formation potential tests were carried out to determine the THMS, DCAA and TCAA formed by chlorination. All waters
had the potential to form significant levels of all the HAAs measured. This study aims to determine the factors affecting
on the formation of THMs and HAAs in Greater Cairo drinking water. The formation of these by-products is controlled
mainly by operating factors (Cl2 dosage, total organic carbon (TOC), pH, temperature of the raw water, bromide ion and
the contact time with Cl2). So, the effect of all of these parameters was investigated in this study in addition to THMs
formation potential and HAAs formation potential. The batch experiments showed that increasing Cl2 dosage leading
to increasing in the formation of THMs and HAAs. In the same trend was observed for the contact time and initial TOC concentration. pH 7.5 was recognized as the optimum value for formation of THMs and HAAs.