Method and device for treating refuse leachate through photoelectric Fenton oxidation reaction based on modified gas diffusion electrode

A gas diffusion electrode and landfill leachate technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high treatment cost, low efficiency, and poor effect. Achieve the effect of reducing dosage, reducing cost and improving degradation efficiency

Inactive Publication Date: 2015-07-22
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0008] In order to solve the problems of low efficiency, poor effect and high treatment cost of landfill leachate treatment, the present invention proposes a method for treating landfill leachate by photoelectric Fenton oxidation reaction based on modified gas diffusion electrodes

Method used

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  • Method and device for treating refuse leachate through photoelectric Fenton oxidation reaction based on modified gas diffusion electrode
  • Method and device for treating refuse leachate through photoelectric Fenton oxidation reaction based on modified gas diffusion electrode
  • Method and device for treating refuse leachate through photoelectric Fenton oxidation reaction based on modified gas diffusion electrode

Examples

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Embodiment 1

[0034] Example 1 Treatment of Raw Landfill Leachate by Photoelectric Fenton Oxidation with Modified Gas Diffusion Electrode

[0035] 45 milliliters of 4% triton aqueous solution, 67.5 milliliters of isopropanol, 3.24 grams of graphitized carbon black, and 6.0 milliliters of 60% polytetrafluoroethylene emulsion were sheared and stirred to obtain a diffusion layer slurry, and the cutting area was 9×9 square The nickel foam is used as the support and current collector. This slurry is evenly coated on the nickel foam. After drying, it is cold-pressed under a pressure of 1 ton and the electrode is heat-treated to remove the dispersant Triton. .

[0036] 40 milliliters of 40% isopropanol aqueous solution, 2.43 grams of graphitized carbon black, 4.5 milliliters of 60% polytetrafluoroethylene emulsion and 0.324 grams of 2-ethylanthraquinone catalysts that are uniformly ground are sheared and stirred to obtain the catalytic layer slurry, and The slurry was uniformly coated on the di...

Embodiment 2

[0040] Example 2 Using Modified Gas Diffusion Electrode Photoelectric Fenton Oxidation to Treat Landfill Leachate Treated by Membrane Bioreactor

[0041] The 2-ethylanthraquinone modified gas diffusion electrode was prepared by the method for preparing the modified gas diffusion electrode described in Example 1. A titanium-based mesh coated electrode with an electrode area of ​​6 × 6 cm2 is used as an anode, and a 2-ethylanthraquinone modified gas diffusion electrode with an electrode area of ​​5 × 5 cm2 is respectively fixed on the electrolytic cell as a cathode. The distance between the electrodes is 3 cm, and a UV lamp with a power of 10 watts and a wavelength of 254 nm is fixed between the two electrodes. The cathode, the anode and the DC power supply are connected with copper wires to form a photoelectric Fenton reaction treatment device based on modified gas diffusion electrodes.

[0042] Take 150 ml of landfill leachate treated by the membrane bioreactor, adjust its ...

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Abstract

The invention relates to a method and device for treating refuse leachate through photoelectric Fenton oxidation reaction based on a modified gas diffusion electrode. H2O2 can be efficiently and continuously generated under the conditions of electrification and oxygen introduction by taking a 2-ethylanthraquinone modified gas diffusion electrode as a cathode; ferrous salt is added from the outside to trigger electro-Fenton reaction to generate strong-oxidative hydroxyl radical which is used as a main oxidant to oxidize organic pollutants in a water body; oxygen is generated by an anode under an electrifying condition, and the hydroxyl radical can also be generated to take stirring and organic matter oxidizing effects; and the synergistic effect of photocatalysis and ferrous ion circulation is achieved by virtue of ultraviolet light. According to the method and device, an electro-catalysis and Fenton technology, an electrochemical oxidation technology and a photocatalysis technology are combined to form a photoelectric Fenton system, so that the efficiency for degrading organic wastes in the refuse leachate is increased.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a method for treating landfill leachate by photoelectric Fenton oxidation reaction based on a modified gas diffusion electrode. Background technique [0002] Landfill leachate is a secondary pollutant produced along with landfills. It mainly comes from precipitation and the water contained in the garbage itself. Its properties will change greatly with the operation time of landfills. Improper disposal of landfill leachate not only affects the quality of surface water, but also endangers the safety of groundwater and human beings. Therefore, proper disposal of landfill leachate is very necessary. [0003] At present, the treatment methods of landfill leachate still use the methods of urban sewage treatment, including biological methods and physical and chemical methods. However, landfill leachate is different from traditional urban sewage. It is characterized by large changes in w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
Inventor 王峰李志林陈国庆刘景军窦美玲吉静宋夜
Owner BEIJING UNIV OF CHEM TECH
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