Method for recycling elemental antimony in pentavalent antimony wastewater through photoelectric coupling

A photoelectric coupling and pentavalent antimony technology, applied in the field of water treatment, can solve the problems of low antimony recovery rate and low pentavalent antimony removal rate, achieve high reduction efficiency, small secondary pollution, and improve removal efficiency

Active Publication Date: 2018-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to propose a method for utilizing hydrated electrons and adopting photoelectric combination technology to r

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  • Method for recycling elemental antimony in pentavalent antimony wastewater through photoelectric coupling

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Experimental program
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Embodiment 1

[0030] In order to further improve the recovery of antimony, in this embodiment, the pentavalent antimony in the water body is recovered through an electrolytic system provided with a diaphragm. see figure 1 , which is a schematic structural diagram of a dual-chamber reactor in an embodiment of the present invention. The separation membrane between the cathode chamber and the anode chamber is a cation exchange membrane (CMI-7000), and the anode used is a ruthenium iridium electrode (with an area of ​​50×50mm 2 ), the cathode is a titanium sheet (the area is 50×50mm 2 ), the ultraviolet lamp adopted is an ultraviolet lamp with a rated power of 9W and a central wavelength of 254nm.

[0031] Specifically, the method includes the following steps:

[0032] 1) Using sodium tetraborate buffer as electrolyte, add 200mL sodium tetraborate buffer (10mM) to the anode chamber, add 140mL solution containing 50mg / L Sb(V) and 10mM sodium tetraborate to the cathode chamber; it should be po...

Embodiment 2

[0045] In order to further improve the recovery of antimony, in this embodiment, the pentavalent antimony in the water body is recovered through an electrolytic system provided with a diaphragm. see figure 1 , which is a schematic structural diagram of a dual-chamber reactor in an embodiment of the present invention. The separation membrane between the cathode chamber and the anode chamber is a cation exchange membrane (CMI-7000), and the anode used is a ruthenium iridium electrode (with an area of ​​50×50mm 2 ), the cathode is a titanium sheet (the area is 50×50mm 2 ), the ultraviolet lamp adopted is an ultraviolet lamp with a rated power of 9W and a central wavelength of 225nm.

[0046] Specifically, the method includes the following steps:

[0047] 1) Using sodium tetraborate buffer as electrolyte, add 200mL sodium tetraborate buffer (8mM) to the anode chamber, add 140mL solution containing 50mg / L Sb(V) and 8mM sodium tetraborate to the cathode chamber; it should be poin...

Embodiment 3

[0054] In order to further improve the recovery of antimony, in this embodiment, the pentavalent antimony in the water body is recovered through an electrolytic system provided with a diaphragm. see figure 1 , which is a schematic structural diagram of a dual-chamber reactor in an embodiment of the present invention. The separation membrane between the cathode chamber and the anode chamber is a cation exchange membrane (CMI-7000), and the anode used is a ruthenium iridium electrode (with an area of ​​50×50mm 2 ), the cathode is a titanium sheet (the area is 50×50mm 2 ), the ultraviolet lamp adopted is an ultraviolet lamp with a rated power of 9W and a central wavelength of 280nm.

[0055] Specifically, the method includes the following steps:

[0056] 1) Using sodium tetraborate buffer as electrolyte, add 200mL sodium tetraborate buffer (12mM) to the anode chamber, add 140mL solution containing 50mg / L Sb(V) and 12mM sodium tetraborate to the cathode chamber; it should be po...

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Abstract

The invention discloses a method for recycling elemental antimony in pentavalent antimony wastewater through photoelectric coupling. The method is characterized by comprising the following steps: reducing pentavalent antimony in water into trivalent antimony by using hydrated electrons; reducing trivalent antimony in the water into antimony by using an electrochemical reduction method so as to recycle antimony in the water. According to the method, a reduction material capable of generating hydrated electrons under excitation of light irradiation can be used as a source of the hydrated electrons; the secondary pollution is low; the hydrated electrons generated after excitation of light irradiation are capable of efficiently reducing pentavalent antimony which is relatively difficultly removed in the water into trivalent antimony which is relatively easily removed; the method is further combined with the electrochemical reduction method for reducing trivalent antimony in the water intoantimony, so that pentavalent antimony which is difficultly directly electrically deposited and recycled can be converted into elemental antimony; the antimony can be recycled; the method is stable and reliable, and is high in repeatability.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for recovering elemental antimony from pentavalent antimony wastewater by photoelectric coupling. Background technique [0002] Antimony (antimony) is the fifth main group element, which belongs to the same main group as arsenic, and the element symbol is Sb. As early as ancient times, humans have discovered and started to use antimony and its compounds in daily life. Taking advantage of its ability to dissolve gold and other metals, antimony has been used for the purification of gold, copper, silver and other metals as early as the 18th century. The presence of antimony increases the hardness and mechanical strength of lead. Antimony is an important element in the manufacture of batteries, man-made alloys, bullets, cables, etc. [0003] Antimony trioxide (Sb 2 o 3 ) are widely used in flame retardant production, paper making, plastic manufacturing, pigments...

Claims

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Application Information

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IPC IPC(8): C25C1/22C25C7/06C22B7/00C22B30/02
CPCC22B7/006C22B30/02C25C1/22C25C7/06Y02P10/20
Inventor 赵旭曹迪
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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