ABSTRACT
Next to hardness, the presence of iron is probably the most common water problem
faced by consumers and water treatment processionals. The secondary (aesthetic)
maximum contaminant levels (MCL) for iron and manganese are 0.3 (mg/l) and 0.05
mg/l, respectively .
Iron and Manganese are two of the most abundant elements found in earth's crust.
The oxidized forms Fe+3 and Mn+4are most prevalent, but reduced forms
(rhodochrosite) [FeCO3] and siderite [MnCO3] that are present in water]. The
existence of iron and manganese in drinking water generates certain unpleasant side
effects, such as color, precipitates in water, stains on clothing and plumbing fixtures.
The objective of the present study is production of ozone by corona discharge (bench
scale, which produce 0.3 mg ozone per minute that sufficient to reduce of ferrous and
Manganous ions 2 ppm and 4 ppm respectively to permissible limits of WHO
specifications as well as disinfecting of water from microorganisms like Escherichia -
Coli, streptococcus -Faecalis and Staphylococcus-Aureus.