In summary, significant information on chlorine reactivity
with the main classes of organic and inorganic compounds is
available in literature. It allows a good understanding of
chlorine reactivity with numerous micropollutants. However,
some gaps in knowledge were also identified. For example,
information on chlorine reactions with heterocyclic structures
is scarce. Similarly, because chlorine reactions with
double bonds of the matrix water components could be
observed under certain water treatment conditions, further
studies on chlorination of olefins should be performed.
Finally, bromination and iodination was sometimes shown
to be highly significant in bromide- and/or iodide-containing
waters because the corresponding reactions with HOBr and
HOI are often orders of magnitude faster than those with
HOCl.
Acknowledgements