Removal of metal ions from process wastewaters

Details Removal of metal ions from process wastewaters Removal of metal ions from process wastewaters

1991-09-24

1992-11-17

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210748, 210777, C02F 142

Patent

active

051640910

ABSTRACT:
Metal ions are removed from process wastewaters by using an electrically conducting, cathodically polarized filter-aid layer whose potential is at least 50 mV more negative than the redox potential of the metal ions to be removed, by passing the metal ion-containing water through the filter-aid layer and periodically renewing the filter-aid layer at intervals of from 2 to 180 minutes by backwashing, classifying and precoating processes.

REFERENCES:
patent: 3679052 (1972-07-01), Asper
patent: 4382866 (1983-05-01), Johnson

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