Process for removing selenium from selenium-containing waste str

Details Process for removing selenium from selenium-containing waste str Process for removing selenium from selenium-containing waste str

1997-04-01

1999-01-05

Cinntins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210681, 210683, 210911, C02F 128

Patent

active

058557890

ABSTRACT:
A process for removing contaminating levels of selenium from a contaminated aqueous solution is disclosed. That process includes providing a vessel or flow-permissive container containing a water-insoluble polymeric adsorption medium having a plurality of polymerized C.sub.1 -C.sub.4 N-alkylated pyridinium-containing adsorption sites. An influent of an aqueous solution having a total selenium concentration of about 10 to about 1000 parts per billion is introduced to the vessel or flow-permissive container to contact the insoluble polymeric adsorption medium. The solution is maintained in contact with that insoluble adsorption medium for a time period sufficient for the medium to bind the selenium in the contacting solution. The resulting aqueous solution is discharged from the vessel as an effluent having a total selenium concentration whose ratio to the total selenium concentration of the influent is about zero to about 10.sup.-3.

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Reilly 5.sub.th Edition Product Index (1990).

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