Process for reducing the concentration of metals and metalloid dissolved in an aqueous solution

摘要

Process for reducing the concentration of metals and metalloid dissolved in an aqueous solution.An aqueous solution, for example, the effluent of a remover of combustion gas.Is treated to remove the metal and metalloid ions by precipitation in situ ferrous ions by adding this to a solution containing ferrous ion.Salt or other such source containing ferrous ion and a base yielding hydroxyl in the presence of metal and metalloid.The reaction conditions include a temperature of at least about 60 198 C and a pH of about 6 to 10.