Water Treatment From nature and from every day living we know that water means life. Nobody can survive without water, in order to meet this demand of life, man begin to search for water, and not just water, but, portable clean water, nothing brings smiles to the face of man like having a portable clean water to drink and use. Due to increase in population and the increase in destructive activities of man, our water system become more polluted. About 1.8 billions of people living on earth do not have access to good portable clean water to drink and to use, largely due to environmental pollution by man's activities, and also expensive cost of water treatment. In order to solve this problem of polluted water to get a good portable clean water to drink and use both domestically and industrial wise, man have invented several water treatment methods over a long period of time. The various Water treatment techniques used in treating water are listed and discussed below; Aeration,...
Iron is one of the major secondary contaminant in both domestic and industrial water supply. Iron have caused water industries several billions of dollars . Iron is the second most abundant metal in the earth's crust behind Aluminum(8%), of which iron accounts for about 5%. Elemental iron is rarely found in nature, as the iron ions Fe2+ and Fe3+ readily combine with oxygen- and sulfur-containing compounds to form oxides, hydroxides, carbonates, and sulfides. As rain fall, rain water infiltrates the soil and underlying geologic formations and dissolves iron, causing it to seep into aquifers that serve as sources of groundwater for wells. In surface water, such as rivers and lakes, dissolved iron is hardly ever found, because it readily reacts with oxygen, forms insoluble compounds and sinks out into the bottom of the water body. Iron is seldom found at concentrations greater than 10 milligrams per liter (mg/L) or 10 parts per million. The iron that seep into the sources of g...