Some Pollutants to Defeat to get Clean Drinking Water

The colorants, especially synthetic origin present in waste water, are responsible for many harmful effects to the environment, flora and aquatic fauna. Among the most important effects are the reduction of dissolved oxygen, eutrophication, the formation of recalcitrant and toxic compounds to cells and obstructing the passage of light to the water bodies and aesthetic impairment [1,2]. As an example, red 2 is an azo colorant that may cause intolerance in people who are affected by salicylates. Moreover, it is a histamine liberator, and may intensify symptoms of asthma. It is also involved in cases of hyperactivity in children when used in combination with benzoates. Many countries like the United States have limited their use [3] because it creates problems requiring medical treatment. When azo-type colorants also called Reagent, are dumped into the water bodies produce amines as consequence of the rupture of azo bond, which cause many effects in some human organs such as the brain, liver, kidney, central nervous and reproductive systems [4,5].