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7. Chlorine dioxide (ClO2)
7.1 Introduction
see also .
In the presence of ammonia, chlorine dioxide does not form chloramines.
In the presence of organic matter, it forms few haloforms. It oxidizes phenols to quinones, which do not give rise to off-flavours. It can destroy complexes formed with iron or manganese and humic substances, and subsequently destroy humic acids.
It could therefore be an ideal replacement for chlorine in pre-oxidation and disinfection.
However, water treated with ClO
2
contains chlorites
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Chlorine dioxide (ClO2)
Ozone
Current legislation on disinfection
1 Microbiology
WHO (World Health Organization) recommendations for Europe (see tables 4 and 5 ), and the USA (see table
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