Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions

摘要

Aqueous effluent solutions containing metal cations may be treated with an extractant comprising an organophosphinic acid, a di-2- ethylhexyl phosphoric acid and/or an aliphatic amine to selectively separate chromium, nickel, cobalt, copper and lead cations from the aqueous solution. Typical extraction techniques include liquid-liquid extraction employing either mixer settlers or columns, liquid membrane extraction and selective supported membrane extraction.