| http://www.w3.org/ns/prov#value | - A process for the removal of heavy metals from aqueous solutions thereof containing one or more of said heavy metals as well as competing ions including calcium and/or magnesium which comprises contacting said aqueous solution with amorphous gels selected from the group consisting of titanium silicates and tin silicates having a molar ratio of silicon-to-titanium or tin of from 1:4 to 1.9:1 and ha
|
