Chemical process for removing selenium from water

• US 5,089,141 A
• Filed: 11/09/1990
• Issued: 02/18/1992
• Est. Priority Date: 11/09/1990
• Status: Expired due to Term

• Current Assignee: Department of Health and Human Services (State of Victoria)
• Original Assignee: The United States of America as represented by the Secretary of the Interior
• Inventors: Murphy, Andrew P.
• Primary Examiner(s): HRUSKOCI, PETER A
• Application Number:
  US07/610,884
• Time in Patent Office: 466 Days
• Field of Search: 204/149, 204/150, 210/702, 210/717, 210/719, 210/723, 210/902, 210/908, 210/912, 210/757, 423/508-510
• US Class Current: 210/719
• CPC Class Codes: C02F 1/705 Reduction by metals
• CPC Class Codes: C02F 2101/20 Heavy metals or heavy metal compounds
• CPC Class Codes: C02F 9/00 Multistage treatment of water, waste water or sewage
• CPC Class Codes: Y10S 210/902 Materials removed
• CPC Class Codes: Y10S 210/908 Organic
• CPC Class Codes: Y10S 210/912 Heavy metal

Abstract

A chemical process for selectively removing organoselenium compounds and selenate from water supplies. The process utilizes a combination of transition metal selected from the group consisting of nickel and copper and an electropositive metal selected from the group consisting of magnesium and aluminum to effectively remove selenium whether present in the water as organic or inorganic compounds or in ionic or non-ionic form.

Claims

1. In a chemical process for the treatment of selenium containing water, wherein said selenium is in the form of organic and inorganic compounds, the improvement comprising adding to said water an effective amount of a combination consisting essentially of a transition metal selected from the group consisting of nickel and copper and a metal consisting of either magnesium or aluminum, and removing said selenium from said water.

2. A process according to claim 1, wherein said transition metal and magnesium or aluminum are in alloy form.

3. A process according to claim 1, wherein said transition metal and magnesium or aluminum are in powder form.

4. A process according to claim 1, wherein said transition metal and magnesium or aluminum metal are contained in a column through which said selenium-containing water passes.

5. A process according to claim 1, wherein said selenium is in the form of ionic and non-ionic compounds.

6. A chemical process for the selective removal of organoselenium compounds and selenate from water supplies which comprises adding to said water supplies an effective amount of a combination consisting essentially of a transition metal selected from the group consisting of nickel and copper and a metal consisting of either magnesium or aluminum, and removing said organoselenium compounds and selenate from said water supplies.

7. A process according to claim 6, wherein organoselenium compounds are present in ionic or non-ionic form.

8. A process according to claim 6, wherein said combination of metals consists of nickel and magnesium.

9. A process according to claim 6, wherein said combination of metals consists of nickel and aluminum.

10. A process according to claim 6, wherein said combination of metals consists of copper and magnesium.

11. A process according to claim 6, wherein said combination of metals consists of copper and aluminum.

12. A process according to claim 6, wherein said combination of metals are contained in a column through which said water supplies pass.