REMOCION DE METALES PESADOS,ESPECIALMENTE PLOMO,A PARTIR DE SISTEMAS ACUOSOS QUE CONTIENEN IONES COMPETENTES EMPLEANDO SILICATOS DE TITANIO Y ESTANO AMORFOS

摘要

A process for the removal of heavy metals such as lead, cadmium, zinc, chromium, arsenic and mercury from aqueous solutions containing one or more of said metals as well as competing ions such as calcium and/or magnesium by contacting said aqueous solution with amorphous titanium or tin silicates is disclosed. Said amorphous titanium and tin silicates are characterized by a silicon-to-titanium or tin molar ratio of from 1:4 to 1.9:1 and a cumulative desorption pore volume ranging from about 0.03 to about 0.25 cubic centimeters per gram.