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Different types of chlorine
The use of chlorine to natural water before every other therapy to improve the coagulation & to remove the style, smell, & color
Post Chlorination
Application of chlorine to treated liquid after all the other treatment. Dosage chlorine are priced between 0.25-5.0mg/lit to have the combine recurring chlorine in number of 0.1-0.2mg/lit
Free Offered Chlorine
Effective chlorine disinfection is dependent upon its chemical type in water. The influencing elements are pH, heat, & natural content in liquid. When chlorine gasoline dissolved in liquid, it rapidly hydrolysis to hydrochloric acid (HCL) & hypochlorous acid (HOCL)
Cl2 + H2O ? H+ + Cl- + HOCL
The balance constant is KH = [H+] [Cl-] [HOCL]
[Cl2(aq)] = 4.48 × 10 - 4 at 25 °C
Hypochlorous acid is a poor acid & at the mercy of the additional dissociation to hypochlorite ions & hydrogen ions
HOCL ? OCl- + H+
& its acid dissociation constant Ka is Ka = [OCl-] [H+]
HOCL = 3.7 × 10-8 at 25 ?C
Combine Available Chlorine
Chlorine reacts with certain mixed constituent in liquid, such as for example ammonia & amino nitrogen compounds to produce the chloramines. They are referred as combined chlorine.
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