Removal of Heavy Metal Ions by Blended Periwinkle Shells From Selected River In Southern Nigeria
Heavy metals are of great ecological significance today due to their toxic and accumulative nature. Warren, noted that various activities of man in recent years have increase the quantity and distribution of heavy metals in the atmosphere, land and water bodies. The extent of these wide-spread but generally little contamination has caused concern about its possible hazard on plants, animals and human beings. Mining, dumping of dangerous military wastes on sites and dumping of carcasses of old damaged vehicles are some of the sources of land heavy metal pollution. Pollution of streams and rivers flowing through agricultural areas where fungicides and pesticides may have been used and even pollutants from industrial effluents contribute most of these heavy metals at the reception sites.
In Nigeria, the Federal Environmental Protection Agency (FEPA) is the body saddled with the responsibility for the protection of the environment. This agency has put in place laws and regulations guiding wastes management and disposal, emphasizing the treatment of wastes before disposal by the concerned industries.