Hot lime precipitation of arsenic from wastewater or groundwater

Details Hot lime precipitation of arsenic from wastewater or groundwater Hot lime precipitation of arsenic from wastewater or groundwater

1993-04-22

1995-01-03

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210668, 210669, 210677, 210721, 210724, 210737, 210758, 210911, C02F 900

Patent

active

053783662

ABSTRACT:
A process is disclosed wherein arsenic dissolved in wastewater or groundwater is removed from solution by precipitation thereof as calcium arsenate formed by the reaction of the arsenic with lime or hydrated lime in a heated solution at a pH of about 11 to about 13. It is preferred that the arsenic is first converted by oxidation to its pentavalent form.

REFERENCES:
patent: 4948297 (1990-08-01), Fleming
patent: 5047226 (1991-09-01), Schon
patent: 5114592 (1992-05-01), Schuster et al.

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