Removal of lead ii mercury ii and copper ii from aqueous solution by using activated carbon prepared from acacia catechu

Abstract

Water is one of the vital substances and it plays an important newlinerole on earth. It is an essential asset for the nourishment of all life. Water newlinecontains a complex mixture of organic and inorganic substance most of which newlineare of natural origin resulting from complex interactions between water, soil, newlineand underlying geological strata and from complex biological, microbiological newlineprocess occurring in water and soil. newlineNowadays, heavy metals release into the environment due to newlineindustrialization and urbanization has posed a great problem. Organic newlinepollutants, the majority of which are susceptible to biological degradation, newlinewhereas heavy metal ions do not degrade into harmless end products. The newlinepresence of heavy metal ions are of major concern due to their toxicity to newlinemany life forms. These are of special concern because they are non-degradable newlineand therefore persistent. newlineSewage and other waste, agricultural discharges, toxic waste newlinefrom chemical factories, fossil fuel plants and so on are the main sources of newlinewater pollution. There are many approaches have been developed to remove newlineheavy metals from waste water. They are coagulation, flocculation, chemical newlineprecipitation, ion exchange, reverse osmosis, ultra-filtration, membrane newlineseparation, electrochemical reduction, and biological treatment. These newlinetechnologies may require expensive treatment and also disposal of metal newlinesludge is tedious. newlineAs adsorption using activated carbon has the unique capacity to newlineeliminate organic and inorganic impurities in water, it is much favoured. newlineDetailed study is needed for preparing cheap and easily available alternative newlinematerials with properties similar to commercially available varieties newline