Chlorination is the most accepted
disinfectant throughout the world because of its economical availability and
effectiveness against the waterborne pathogens. Chlorination worked effectively
against the microorganisms and provide safeguard against several waterborne diseases on
theother hand, it reacts with natural organic matters (NOMs) to form
disinfectionby-products (DBPs). Studies have shown a relationship between
long-term exposure to DBPs and increase risk of cancer and adverse reproductive
outcomes. Trihalomethanes (THMs) are the most abundant DBPs .
THMs constitute a major class of DBPs, including
chloroform (CHCl3), bromodichloromethane (CHCl2Br), chlorodibromomethane
(CHClBr2) and bromoform (CHBr3). Since THMs concentration in water is a serious
health concern and United States, European Union (EU) and World HealthOrganization (WHO) regulated THMs in public water supplies. Several factors in
addition to NOMs influenced the formation of THMs including the nature of
source water, amount and time of contact of chlorine, levels of total organic
compounds (TOC), temperature and pH etc.
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