Ozone of ozone is its ability to remove

Ozone is one of the strongest
oxidants that can be implied for the removal of pollutants from drinking water.
Due to the high oxidation and disinfection efficiency, ozone has been used in
drinking water treatment for many years. Ozone has been applied for the removal
of inorganic species from water. Pre-oxidation using ozone followed by the
filtration or coagulation-flocculation-decantation have been used for the
elimination of inorganic species from water. The metallic ions form insoluble
species upon oxidation and can easily removed 46. Another advantage of ozone
is its ability to remove ammonia from water 46. Another important application
of ozone is its ability to kill microorganisms from water. It has been implied
for the inactivation of bacteria, viruses and the control of algal growth. It
can inactivate microorganisms such as protozoa, E. coli, Bacillus sublilis
spores, Rotavirus and Giardia lamblia cysts 47. Ozone can penetrate through
the cell membrane of Escherichia coli and react with the cytoplasmic
substances. In addition, the degradation of nucleic acids, is being one of the
important factors responsible for cell killing 46. The ozone can inactive the
viruses by attacking their protein coat or direct damage of nucleic acids. It
has been reported that ozone can attack both the protein coat and ribonucleic
acids of tobacco mosaic virus 46.

Ozone can remove effectively
organic pollutants from drinking waters. However, it reacts slowly with some
organic compounds such as organic acids, methyl tertiary butyl ethers (MTBE)
and chlorinated organic compounds. 44. Despite the many advantages of ozone
treatment as discussed above, the major disadvantage of ozone is the formation
of toxic by-products (e.g. organic acids). Therefore, it is important to imply
advanced oxidation processes. Many advanced oxidation processes have been
developed which have high efficienciently of mineralize organic compounds, when
compared with ozonation alone, for example catalytic ozonation, O3/UV, O3/H2O2
and UV/ H2O2 48-51.