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Method and apparatus for highly efficient removal of water organisms by utilizing photoelectric Fenton reaction

A Fenton reaction and water removal technology, applied in the direction of light water/sewage treatment, etc., can solve the problems of consuming many chemicals and raw materials, secondary pollution, complicated operation, etc., and achieve good physical and chemical properties, easy operation, and operation methods. simple effect

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

AI Technical Summary

Problems solved by technology

The methods widely used today include coagulation precipitation, adsorption, chemical oxidation, ion exchange, etc., but they all need to consume more chemicals and raw materials, the cost is high, the operation is complicated, and there are secondary pollution problems

Method used

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  • Method and apparatus for highly efficient removal of water organisms by utilizing photoelectric Fenton reaction
  • Method and apparatus for highly efficient removal of water organisms by utilizing photoelectric Fenton reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1. Different treatment process is to the removal of organic matter

[0020] Reaction target solution volume: 450ml

[0021] Reaction target solution concentration: acid red B200mg / L

[0022] Solution initial pH: 3.00

[0023] Plate area: 27cm 2

[0024] Electrolyte concentration: 0.05M Na 2 SO 4

[0025] Oxygen flow rate: 100ml / min

[0026] Response time: 360min

[0027] They are anodic oxidation (the cathode is a titanium ruthenium mesh electrode), activated carbon fiber (ACF) adsorption (without electricity), and electric Fenton oxidation (without light, Fe 2+ 1mM), and photoelectric Fenton oxidation (Fe 2+ 1mM, plus ultraviolet light) to treat Acid Red B solution, the removal of TOC before and after treatment is shown in Table 1.

[0028] time

[0029] It can be seen from Example 1 that the photoelectric Fenton reaction can effectively degrade and remove organic pollutants in water, and its removal efficiency is higher than that of act...

Embodiment 2

[0030] Embodiment 2. Influence of current intensity in photoelectric Fenton reaction process

[0031] Reaction target solution volume: 450ml

[0032] Reaction target solution concentration: acid red B 200mg / L

[0033] Solution initial pH: 3.00

[0034] Electrolyte concentration: 0.05M Na 2 SO 4

[0035] Oxygen flow rate: 100ml / min

[0036] Current intensity: 0.12A, 0.24A, 0.36A, 0.50A

[0037] Response time: 360min

[0038] The removal of TOC before and after treatment is shown in Table 2.

[0039] Table 2 Effect of current intensity on TOC removal in Example 2

[0040]

[0041] It can be seen from Example 2 that as the current intensity increases, the removal rate of TOC also increases correspondingly, which is due to the increase in the amount of hydrogen peroxide produced.

Embodiment 3

[0042] Example 3. Photoelectric Fenton removal of acid red B under different gas conditions

[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] Gas type: Ar, O 2

[0049] Gas flow rate: 100ml / min

[0050] Current intensity: 360mA

[0051] The Acid Red B solution was treated when the gases were oxygen and argon respectively, and the removal of TOC before and after treatment is shown in Table 3.

[0052] time

[0053] As can be seen from Example 3, the type of gas introduced has a certain impact on photoelectric Fenton degradation of Acid Red B, and the introduction of oxygen is beneficial to the better mineralization and removal of organic matter, but when argon gas is introduced, it also has a certain effect. Good removal effect, which is due to the evolution of oxygen fro...

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Abstract

The invention provides a photoelectrical FenDun method for removing the non-degradable organic substance in water, which combines photochemistry reaction and electrical FenDun reaction to co-treat the organic substance effectively with multiple actions. The invention also provides a device applying the photoelectrical FenDUN reaction to remove organic substance in water, which comprises: the reactor employing shape stable electrode (DSA) as anode, employing activated charcoal as cathode, putting the low pressure mercury vapor lamp closed in the quartz glass tube vertically between the anode and cathode and venting a certain quantity of oxygen to the cathode surface, adding marginal ferrous salt into the organic wastewater with pH being about 3 as catalyst and importing current flow for electrolysis to remove pollutant. The invention oxides and degrades organic substance by using the hydroxyl free radical generated by photochemical reaction and electrical FenDun reaction, the hydroxyl free radical possesses strong oxidability which can oxide organic substance without selection, and is characterized by the complete, fast and effective oxidation and no secondary pollution.

Description

technical field [0001] The invention relates to a high-efficiency water treatment method and device for water and waste water treatment, which utilizes light-assisted electric 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. The ultraviolet lamp is placed in a closed quartz tube and placed vertically between the positive and negative electrodes. Oxygen or air is introduced into the surface of the cathode, and the oxygen molecules can be effectively absorbed in the activated carbon fiber. The surface of the cathode is reduced to generate hydrogen peroxide, which undergoes a Fenton reaction with a certain amount of ferrous ions or iron ions added to the solution, and at the same time, the iron ions can undergo a reduction reaction on the surface of the cathode and under ultraviolet light to g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32
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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