Process for the removal of heavy metals from aqueous systems usi

Details Process for the removal of heavy metals from aqueous systems usi Process for the removal of heavy metals from aqueous systems usi

1995-08-28

1997-09-16

Nessler, Cynthia L.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210688, 210691, C02F 128, C02F 142

Patent

active

056676948

ABSTRACT:
This invention relates to a process for removing dissolved heavy metals including lead and radioactive contaminants from contaminated aqueous systems including aqueous soil systems. Such systems have resulted from Department of Defense activities and chemical manufacture, as well as from a large variety of past activities. An organically modified smectite clay, or organoclay, is used to treat these systems. Organoclays are the reaction product of smectite clays and quaternary ammonium compounds. The organoclay is brought in contact with system to be treated where it sorbs the heavy metal in the aqueous system onto the organoclay which sorbed complex is then removed by a variety of methods including flotation and air sparging.

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