Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1988-08-26
1990-03-20
Wyse, Tom
Liquid purification or separation
Processes
Ion exchange or selective sorption
210679, 210688, 210912, 210914, C02F 142
Patent
active
049099442
ABSTRACT:
A method of removing heavy metals from aqueous solution, a composition of matter used in effecting said removal, and apparatus used in effecting said removal. One or more of the polypeptides, poly (.gamma.-glutamylcysteinyl)glycines, is immobilized on an inert material in particulate form. Upon contact with an aqueous solution containing heavy metals, the polypeptides sequester the metals, removing them from the solution. There is selectivity of poly (.gamma.-glutamylcysteinyl)glycines having a particular number of monomer repeat units for particular metals. The polypeptides are easily regenerated by contact with a small amount of an organic acid, so that they can be used again to remove heavy metals from solution. This also results in the removal of the metals from the column in a concentrated form.
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Delhaize Emmanuel
Furlong Clement
Jackson Paul J.
Robinson Nigel J.
Unkefer Clifford J.
Cordovano Richard J.
Gaetjens Paul D.
Moser William R.
The United States of America as represented by the United States
Wyse Tom
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