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Removal of natural organic matter from drinking water by advanced oxidation processes
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Abstract
Over the past 10-20years the amount of the natural organic matter (NOM) has been increased
in raw water supplies on several areas. The presence of NOM causes many problems in
drinking water treatment processes, including: (i) negative effect on water quality
by colour, taste and odor problems, (ii) increased coagulant and disinfectant dose
requirements (which in turn results increased sludge and potential harmful disinfection
by-product formation), (iii) promoted biological growth in distribution system, and
(iv) increased levels of complexed heavy metals and adsorbed organic pollutants. Thus,
more efficient methods for the removal of NOM have emerged. Among these are advanced
oxidation processes (AOPs). These include O(3)/H(2)O(2), O(3)/UV, UV/H(2)O(2), TiO(2)/UV,
H(2)O(2)/catalyst, Fenton and photo-Fenton prosesses as well as ultrasound. In the
present work, an overview of the recent research studies dealing with AOP methods
for the removal of NOM and related compounds from drinking water is presented.