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Device capable of generating electric energy and simultaneously removing metal ions and method of device

A metal ion, electric energy technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of inability to treat wastewater, and achieve mild conditions, recovery, and simple operation.

Active Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It fundamentally overcomes the defect that fuel cells cannot treat wastewater

Method used

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  • Device capable of generating electric energy and simultaneously removing metal ions and method of device
  • Device capable of generating electric energy and simultaneously removing metal ions and method of device
  • Device capable of generating electric energy and simultaneously removing metal ions and method of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The anolyte is potassium hydroxide solution of ethanol, the catholyte is the electrolytic solution of hexavalent chromium and sulfuric acid; the anode is carbon fiber cloth loaded with platinum catalyst, and the platinum load is 0.1-0.5mg Pt / cm 2 , the cathode is directly made of carbon fiber cloth; the cathode and anode liquids are completely separated, and the cathode chamber and the anode chamber are connected by an immobilized electrolyte made of gel / saturated potassium nitrate. The open circuit voltage is 0.6~2V, and the voltage can reach 0.05~1.5V under a certain external load. The removal rate of hexavalent chromium is over 90%.

Embodiment 2

[0047] The operation steps are the same as in Example 1, except that the two ends of the immobilized electrolyte are ion-exchange membranes, and a polymer containing ion-exchange groups is arranged in the middle of the ion-exchange membranes. Before use, the ion-exchange membranes need to be placed in hydrogen peroxide, Soak in one or more aqueous solutions of hydrochloric acid, sulfuric acid and sodium chloride at a temperature of 50-75°C for 3-5 hours, the anolyte is potassium hydroxide solution of ethanol, and the catholyte is a mixed aqueous solution of hexavalent chromium and sulfuric acid; The anode is a carbon fiber cloth loaded with a platinum catalyst, and the platinum loading is 0.1-0.5mg Pt / cm 2 , the cathode is directly made of carbon fiber cloth. The open circuit voltage is 0.6~2V, and the voltage can reach 0.05~1.5V under a certain external load. The removal rate of hexavalent chromium is over 90%.

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Abstract

The invention discloses a device capable of generating electric energy and simultaneously removing metal ions and a method of the device. An anode chamber is connected with a cathode chamber by an immobilized electrolyte device, an anode is arranged in the anode chamber, a cathode is disposed in the cathode chamber, the anode and the cathode are respectively connected with two ends of an external load by leads, an outlet of an anode liquid storage chamber is sequentially connected with a first liquid delivery chamber and an inlet of the lower portion of the anode chamber via liquid delivery pipes, an inlet of the anode liquid storage chamber is connected with an outlet of the upper portion of the anode chamber, an outlet of a cathode liquid storage chamber is sequentially connected with a second liquid delivery pump and an inlet of the lower portion of the cathode chamber, and an inlet of the cathode liquid storage chamber is connected with an outlet of the upper portion of the cathode chamber. Electrons are outputted after oxidation reaction of electroactive substances of the anode, and are shifted to the cathode, metal ions of the cathode receive the electrons to realize reduction reaction so as to generate substances or simple substances with less toxicity, and electric energy is generated under the certain external load. When the method is applied to treating waste water containing metal ions, a large amount of chemical is omitted, high energy consumption is avoided, and the electric energy can be generated.

Description

technical field [0001] The invention relates to a device and a method for removing metal ions while generating electric energy by itself. Background technique [0002] Industrial wastewater contains different kinds of metal ions. Because metal ions, especially heavy metal ions, have a great impact on the ecological environment, their treatment has always been a hot topic in the field of environmental protection. Traditional treatment methods mainly include physical and chemical treatment methods, such as chemical precipitation, adsorption, ion exchange, membrane separation, electrodeposition, etc. Chemical treatment needs to adjust the pH value or add reducing substances, which increases the treatment cost and produces a large amount of sludge, which leads to secondary pollution problems, and the steps are cumbersome; methods such as ion exchange, membrane separation, or electrodeposition consume materials or electricity so that the cost is high . It is very important to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/62C02F1/64
Inventor 吴祖成张慧敏周明华
Owner ZHEJIANG UNIV
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