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4
REVERSE OSMOSIS AS COMPARED with other water treatment methods
Water
treatment
method
Impurities
Disinfection
Filtration
Membrane filtration
Chemical
UV
lamp
Distillation
Ceramic
filter
Carbon
filter
Cation-
exchange
filter
Anion-
exchange
filter
Micro
filtration
Reverse
osmosis
Solids (>1
µ
m)
Water hardness (cal-
cium and magnesium)
Iron and manganese
Copper, lead and
cadmium
Fluorides
Chlorides
Chlorine
Benzene and
mineral oils
Aromatic
hydrocarbons
Chlorinated
hydrocarbons
Threechloro-
methane
Other trihalo-
methanes
Pesticides
Bacteria and viruses
Explanation:
efficiency of impurity removal