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Method and apparatus for removing water organisms by utilizing inductive electric Fenton reaction

A technology of Fenton reaction and induction electricity, which is applied in the field of water and wastewater treatment, can solve the problems of pH increase of reaction solution and unfavorable Fenton reaction, etc., and achieve the effect of easy operation, good physical and chemical properties, and simple operation method

Active Publication Date: 2006-06-21
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

But this method will cause the pH of the reaction solution to increase, which is unfavorable for the carrying out of the Fenton reaction

Method used

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  • Method and apparatus for removing water organisms by utilizing inductive electric Fenton reaction
  • Method and apparatus for removing water organisms by utilizing inductive electric Fenton reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Comparison of the removal effect of organic matter by induction electro-Fenton and electro-Fenton reaction

[0018] Reaction target solution volume: 450ml

[0019] Reaction target solution concentration: acid red B 200mg / L

[0020] Solution initial pH: 3.00

[0021] Plate area: 27cm 2

[0022] Electrolyte concentration: 0.05M Na 2 S0 4

[0023] Oxygen flow rate: 100ml / min

[0024] Response time: 360min

[0025] Induction electric Fenton induction electrode area: 0.45cm 2 , Electric Fenton reaction ferrous ion concentration: 1mM

[0026] The acid red B solution was treated by electro-Fenton oxidation and induction electro-Fenton oxidation respectively, and the chromaticity and TOC removal before and after treatment are shown in Table 1.

[0027] processing time

[0028] It can be seen from Example 1 that the induction electro-Fenton reaction can achieve the same organic matter remov...

Embodiment 2

[0029] Embodiment 2. Changes of ferrous ions and total iron in the induction electric Fenton reaction process

[0030] Reaction target solution volume: 450ml

[0031] Reaction target solution concentration: high-purity water

[0032] Solution initial pH: 3.00

[0033] Electrolyte concentration: 0.05M Na 2 SO 4

[0034] Oxygen flow rate: 100ml / min

[0035] Current intensity: 0.36A

[0036] Induction electrode area: 0.45cm 2

[0037] Response time: 360min

[0038] The changes of ferrous ion and total iron concentration before and after treatment are shown in Table 2.

[0039] Table 2 embodiment 2 current intensity influences on TOC removal situation

[0040]

[0041] As can be seen from Example 2, the total iron concentration dissolved in the induction electro-Fenton reaction is only 9.26 mg / L, which is much smaller than the 56 mg / L required by the electro-Fenton reaction.

Embodiment 3

[0042] Example 3. Removal of Acid Red B by induction electro-Fenton under different induction electrode areas

[0043] Reaction target solution volume: 450ml

[0044] Reaction target solution concentration: acid red B 200mg / L

[0045] Solution initial pH: 3.00

[0046] Plate area: 27cm 2

[0047] Electrolyte concentration: 0.05M Na 2 SO 4

[0048] Induction iron electrode area: 0cm 2 , 0.25cm 2 , 0.45cm 2 and 0.76cm 2

[0049] Gas flow rate: 100ml / min

[0050] Current intensity: 360mA

[0051] The electro-Fenton reaction of induction electrodes with different areas was used to treat the acid red B solution, and the removal of TOC before and after treatment is shown in Table 3.

[0052] Induction iron electrode area (cm 2 )

[0053] As can be seen from Example 3, along with the increase of induction iron electrode area, the TOC removal rate of method improves, and this is because the ferrou...

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Abstract

The invention provides a faradic electrical FenDun method of removing the non-degradable organic matter in water, applying the faradic ferro-electricity to the electrical FenDun reaction, the ferrous iron ion dissolving out from the surface of iron electrode through oxidation-reduction reaction and electrochemical faradic reaction in electrolytic process and reacting with hydrogen dioxide generated on the cathode surface, that is FenDun reaction, generating hydroxyl free radical with high effect to degrade the organic matter in water. The invention also provides a device applying the faradic electrical FenDUN reaction to remove organic substance in water, which comprises: the reactor employing shape stable electrode as anode, employing activated charcoal fiber as cathode, putting the iron faradic electrode of certain area between the anode and cathode and venting a certain quantity of oxygen to the cathode surface. Adding organic wastewater with pH being about 3 into reactor and importing current flow for electrolysis to remove pollutant. The invention employs oxidation-reduction reaction and electrical chemical reaction to generate the ferrous iron ion gradually needed for FenDun reaction which reacts with the hydrogen dioxide generated by electrochemical reaction to generate the FenDUn reaction which generates the hydroxyl free radical with high effect to degrade the organic matter in water and realizes the purpose of removing pollutant.

Description

technical field [0001] The invention relates to a novel water treatment method and device for water and waste water treatment, which utilizes induction electro-Fenton reaction to degrade organic matter in water so as to purify water and waste water. Specifically, the activated carbon fiber with high specific surface area is used as the cathode, and the shape-stable electrode is used as the anode, and a certain area of ​​the induction iron electrode is placed between the cathode and anode electrodes. The reaction or induction electrochemical reaction is dissolved out, and the Fenton reaction occurs with the hydrogen peroxide generated by the electrochemical reduction on the surface of the activated carbon fiber cathode, and a strong oxidative hydroxyl radical is generated to degrade the organic matter. During the electrolysis process, ferrous ions and hydrogen peroxide are gradually added by reaction, which can improve the efficiency of the reaction between ferrous ions and hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 曲久辉王爱民刘会娟雷鹏举
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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