Method for removing organic matters in water by utilizing three-dimensional electrode electro-fenton and device thereof
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A three-dimensional electrode, water removal technology, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., to save operating costs, reduce mass transfer effects, and improve reaction efficiency.
Inactive Publication Date: 2011-05-25
HUAZHONG NORMAL UNIV
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In China, there are only related patents on three-dimensional electrode electrolytic cell and two-electrode system electro-Fenton
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Embodiment 1
[0022] Example 1: Three-dimensional Electrode Fenton Oxidation Treatment of Explosives Wastewater
[0023] Take 400mL of explosive wastewater after flocculation, adjust the pH to 7, add 300g of activated carbon, use carbon fiber (ACF) as the cathode, iron sheet as the anode, and the distance between the plates is 8cm. Actual electrolysis area: 5cm×6cm. Both ends of the reactor were simultaneously aerated (flow rate 3.5 L / min). Constant voltage 9V. Sampling every 1h, the reaction time is 4h. The COD values before and after treatment are shown in Table 1.
[0024]Table 1 embodiment 1 different treatment time COD value
[0025] time
Embodiment 2
[0026] Example 2: Three-dimensional Electrode Fenton Oxidation Treatment of Leather Wastewater
[0027] Take 400mL of leather wastewater, adjust the pH to 2, add 300g of medical stone, use the graphite electrode as the cathode, the iron sheet as the anode, and the distance between the plates is 8cm. Actual electrolysis area: 5cm×6cm. Both ends of the reactor were simultaneously aerated (flow rate 5L / min), and the constant voltage was 12V. Sampling every 1h, the reaction time is 3h. The COD values before and after treatment are shown in Table 2.
[0028] Table 2 embodiment 2 different treatment time COD value
[0029] time
Embodiment 3
[0030] Example 3: Three-dimensional Electrode Electro-Fenton Oxidation Treatment of Printing and Dyeing Wastewater
[0031] Take 400mL of printing and dyeing wastewater, adjust the pH to 5, add 300g of zeolite, use the carbon nanotube composite material as the cathode, and the iron plate as the anode, the distance between the plates is 9cm, the actual electrolysis area: 5cm×6cm. Both ends of the reactor were simultaneously aerated (flow rate 8L / min), and the constant voltage was 15V. Sampling every 1h, the reaction time is 3h. The COD values before and after treatment are shown in Table 3.
[0032] Table 3 embodiment 3 different treatment time COD value
[0033] time
[0034] 3h
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Abstract
The invention relates to a method for carrying out oxidation treatment on organic waste water by utilizing a three-dimensional electrode electro-fenton and a device thereof. The device comprises a reactor shell, a carbon material cathode, an iron plate anode, a three-dimensional particle electrode of a fixed bed, a direct-current voltage-stabilizing power supply, a microporous aeration plate and an air pump, wherein a reactor consists of a reaction chamber and a gas chamber; the carbon material cathode, the iron plate anode and the particle electrode are positioned in the reaction chamber at the upper part of the reactor; and the gas chamber is formed between the bottom of the reactor and the microporous aeration plate. After direct current is introduced, the iron anode is oxidized to generate iron ions, oxygen in the gas chamber is reduced on the surface of the cathode to generate hydrogen peroxide, and the iron ions and the hydrogen peroxide form a fenton reagent to oxidize and remove organic matters in waste water; and simultaneously, due to the particle electrode, the contact area and the contact time of the waste water and the fenton reagent are increased, and the mass transfer effect of the waste water in the reactor is reduced. The invention is applicable to treatment of various types of organic waste water, the equipment is compact, the operation is easy, the whole reactor is easy to control, and the requirements of an actual water treatment unit are met.
Description
technical field [0001] The invention relates to a method and a device for removing organic matter in water by a three-dimensional electrode electro-Fenton, belonging to the technical field of water pollution control. Background technique [0002] The discovery of Fenton's reagent has a history of more than 100 years. Iron ions and hydrogen peroxide are two necessary raw materials in the classic Fenton's reagent. Fenton's reagent has a strong oxidizing ability, and is especially suitable for the treatment of some refractory or biologically toxic industrial wastewater such as phenols, aromatic amines, aromatic hydrocarbons, pesticides and nuclear waste. The reason why Fenton's reagent has a very strong oxidation ability is that hydrogen peroxide can generate hydroxyl radicals (OH) under the catalysis of iron ions, and OH has a stronger oxidation electrode potential (2.8V ), than ozone (O 3 , 2.07V), and hydrogen peroxide (hydrogen peroxide, 1.77V) are 35% and 59% higher res...
Claims
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