Valuable metal selectively adsorbing electrode and method for selectively recovering valuable metals

Patent metadata

Field	Value
Publication number	US-10323331-B2
Application number	US-201615394330-A
Country	US
Kind code	B2
Filing date	Dec 29, 2016
Priority date	Dec 29, 2016
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The present disclosure provides a valuable metal selectively adsorbing electrode, including: an electrode formed by a carbon-containing material; and a protein of a bacterium of genus Tepidimonas immobilized on the electrode formed by a carbon-containing material to form the valuable metal selectively adsorbing electrode, wherein the valuable metal includes gold, palladium, silver or indium.

First claim

What is claimed is:

1. A valuable metal selectively adsorbing electrode, comprising:
an electrode formed by a carbon-containing material; and
a protein of a bacterium of genus Tepidimonas immobilized on the electrode formed by a carbon-containing material to form the valuable metal selectively adsorbing electrode,
wherein the valuable metal comprises gold, palladium, silver or indium.

2. The valuable metal selectively adsorbing electrode as claimed in claim 1 , wherein the carbon-containing material comprises carbon cloth, activated carbon cloth, activated carbon, carbon nanotube (CNT) or graphene.

3. The valuable metal selectively adsorbing electrode as claimed in claim 1 , wherein the electrode formed by a carbon-containing material comprises a collector plate for immobilizing the carbon-containing material thereon.

4. The valuable metal selectively adsorbing electrode as claimed in claim 3 , wherein the carbon-containing material comprises activated carbon, carbon nanotube (CNT) or graphene.

5. The valuable metal selectively adsorbing electrode as claimed in claim 1 , wherein the carbon-containing material is subjected to an acid oxidization treatment to promote the immobilization of the protein of a bacterium of genus Tepidimonas.

6. The valuable metal selectively adsorbing electrode as claimed in claim 5 , wherein an agent for the acid oxidization treatment comprises nitric acid, sulfuric acid or a combination thereof.

7. The valuable metal selectively adsorbing electrode as claimed in claim 5 , wherein after the acid oxidization treatment, the carbon-containing material is further subjected to an amidation treatment.

8. The valuable metal selectively adsorbing electrode as claimed in claim 7 , wherein an agent for the amidation treatment comprises 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDAC) and/or N-hydroxysuccinimide (NHS).

9. The valuable metal selectively adsorbing electrode as claimed in claim 8 , wherein the agent for the amidation treatment further comprises 2-morpholino-ethanesulfonic acid (MES) or monopotassium phosphate (KH 2 PO 4 ).

10. The valuable metal selectively adsorbing electrode as claimed in claim 1 , wherein the bacterium of genus Tepidimonas comprises Tepidimonas fonticaldi.

11. The valuable metal selectively adsorbing electrode as claimed in claim 1 , wherein the bacterium of genus Tepidimonas is Tepidimonas fonticaldi sp. nov.) BCRC 80391.

12. The valuable metal selectively adsorbing electrode as claimed in claim 11 , wherein the carbon-containing material is carbon fiber cloth.

13. The valuable metal selectively adsorbing electrode as claimed in claim 12 , wherein the carbon-containing material is subjected to an acid oxidization treatment and an amidation treatment after the acid oxidization treatment to promote the immobilization of the protein of a bacterium of genus Tepidimonas.

14. The valuable metal selectively adsorbing electrode as claimed in claim 13 , wherein an agent for the acid oxidization treatment comprises nitric acid, sulfuric acid or a combination thereof.

15. The valuable metal selectively adsorbing electrode as claimed in claim 13 , wherein an agent for the amidation treatment comprises 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDAC) and N-hydroxysuccinimide (NHS).

16. The valuable metal selectively adsorbing electrode as claimed in claim 15 , wherein the agent for the amidation treatment further comprises 2-morpholino-ethanesulfonic acid (MES).

17. The valuable metal selectively adsorbing electrode as claimed in claim 11 , wherein the valuable metal is gold.

18. A method for selectively recovering a valuable metal, comprising:
(a) bringing a liquid containing a valuable metal into contact with a valuable metal selectively adsorbing electrode, wherein the valuable metal selectively adsorbing electrode comprises:
an electrode formed by a carbon-containing material; and
a protein of a bacterium of genus Tepidimonas immobilized on the electrode formed by a carbon-containing material to form the valuable metal selectively adsorbing electrode, wherein the protein of a bacterium of genus Tepidimonas has an effect of selectively adsorbing a valuable metal, and wherein the carbon-containing material is subjected to an acid oxidization treatment to promote the immobilization of the protein of a bacterium of genus Tepidimonas ; and
(b) applying a voltage to the valuable metal selectively adsorbing electrode to allow the valuable metal in the liquid containing a valuable metal to adsorb to the valuable metal selectively adsorbing electrode,
wherein the valuable metal comprises gold, palladium, silver or indium.

19. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein the carbon-containing material comprises carbon fiber cloth, activated carbon fiber cloth, activated carbon, carbon nanotube (CNT) or graphene.

20. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein the electrode formed by a carbon-containing material comprises a collector plate for immobilizing the carbon-containing material thereon.

21. The method for selectively recovering a valuable metal as claimed in claim 20 , wherein the carbon-containing material activated carbon, carbon nanotube (CNT) or graphene.

22. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein an agent for the acid oxidization treatment comprises nitric acid, sulfuric acid or a combination thereof.

23. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein after the acid oxidization treatment, the carbon-containing material is further subjected to an amidation treatment.

24. The method for selectively recovering a valuable metal as claimed in claim 23 , wherein an agent for the amidation treatment comprises 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDAC) and/or N-hydroxysuccinimide (NHS).

25. The method for selectively recovering a valuable metal as claimed in claim 24 , wherein the agent for the amidation treatment further comprises 2-morpholino-ethanesulfonic acid (MES) or monopotassium phosphate (KH 2 PO 4 ).

26. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein the bacterium of genus Tepidimonas comprises Tepidimonas fonticaldi.

27. The method for selectively recovering a valuable metal as claimed in claim 18 , wherein the bacterium of genus Tepidimonas is Tepidimonas fonticaldi sp. nov.) BCRC 80391.

28. The method for selectively recovering a valuable metal as claimed in claim 27 , wherein the carbon-containing material is carbon fiber cloth.

29. The method for selectively recovering a valuable metal as claimed in claim 28 , wherein the carbon-containing material is subjected to an acid oxidization treatment and an amidation treatment after the acid oxidization treatment to promote the immobilization of the protein of a bacterium of genus Tepidimonas.

30. The method for selectively recovering a valuable metal as claimed in claim 29 , wherein an agent for the acid oxidization treatment comprises nitric acid, sulfuric acid or a combination thereof.

31. The method for selectively recovering a valuable metal as claimed in claim 29 , wherein an agent for

Assignees

• Ind Tech Res Inst

Inventors

• Chung Li-Ching
• Yen Chia-Heng
• Liang Teh-Ming
• Horng Ren-Yang
• Chang Min-Chao
• Shao Hsin
• Liu Po-I
• Fang Chih-Hsiang
• Han Yin-Lung
• Fan kai-chun

Classifications

• C02F3/34

  characterised by the microorganisms used · CPC title

• C25C7/02 Primary

  Electrodes (consumable anodes for the refining the metals C25C1/00 - C25C5/00); Connections thereof · CPC title

• C02F3/005

  Combined electrochemical biological processes (aeration by electrolytically produced oxygen bubbles C02F3/202) · CPC title

• C02F2001/46138

  Electrodes comprising a substrate and a coating · CPC title

• C25C7/08

  Separating of deposited metals from the cathode · CPC title