Method for processing refractory wastewater by three-dimensional electrode coupled with oxidant

A three-dimensional electrode and oxidant technology, which is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problem that the degradation efficiency and degradation effect of pollutants need to be improved, increase the cost of wastewater treatment, and the types and quantities are limited To achieve the effect of improving the efficiency of wastewater treatment, reducing the difficulty of mud-water separation and reducing the difficulty of treatment

Active Publication Date: 2018-12-04
SICHUAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

Not only that, this method will produce a large amount of iron sludge in the process of wastewater treatment, which is not conducive to the separation of sludge and water, and the subsequent treatment and disposal of sludge is required, which increases the cost of wastewater treatment
In addition, although aeration can promote the production of hydrogen peroxide at the cathode and accelerate the generation of hydroxyl radicals through the electro-Fenton process, the types and quantities of free radicals generated by this method are relatively limited, and the degradation efficiency and degradation effect of pollutants are both low. still needs to be improved

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  • Method for processing refractory wastewater by three-dimensional electrode coupled with oxidant
  • Method for processing refractory wastewater by three-dimensional electrode coupled with oxidant

Examples

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Embodiment 1

[0029] In this example, atrazine (ATZ, chemical name 2-chloro-4-diethylamino-6-isopropylamino-1, 3, 5) with a concentration of 10 mg / L and a pH adjusted to 6.3 -Triazine) solution is used as simulated wastewater to illustrate the method for treating refractory wastewater with three-dimensional electrode coupled with oxidant provided by the present invention. The steps are as follows:

[0030] (1) Put two electrode plates with a size of 5cm×11cm in the waste water treatment container. The two electrode plates are facing and parallel to each other and connected to a DC power supply. The anode plate is a composite metal oxide Ti / RuO. 2 -IrO 2 The cathode plate is a stainless steel plate, and the distance between the anode plate and the cathode plate is 57mm. Add 200 mL of simulated wastewater to a wastewater treatment container with anode and cathode plates.

[0031] (2) Add copper ferrite (CuFe 2 O 4 , CFO) particles, the amount of CFO particles added is 3g per liter of simulated was...

Embodiment 2

[0036] In this example, sulfamethoxazole (SMX, the chemical name is 4-amino-N-(5-methyl-3-isoxazolyl)benzenesulfonamide with a concentration of 10 mg / L and a pH adjusted to 7.0 ) The solution is used as simulated wastewater to illustrate the method for treating refractory wastewater with three-dimensional electrode coupled oxidant provided by the present invention, and the steps are as follows:

[0037] (1) Put two electrode plates with a size of 5cm×11cm in the waste water treatment container. The two electrode plates are facing and parallel to each other and connected to the DC power supply. Among them, the anode plate is a nickel plate and the cathode plate is a stainless steel plate. , The distance between the anode plate and the cathode plate is 65mm. Add 200 mL of simulated wastewater to the wastewater treatment container with anode and cathode plates, and then add electrolyte Na 2 SO 4 , Na 2 SO 4 The added amount is 10mmol per liter of wastewater.

[0038] (2) Add zinc fer...

Embodiment 3

[0040] In this embodiment, a 2,4-dinitrophenol (2,4-DNP) solution with a concentration of 50 mg / L and a pH adjusted to 7.0 is used as simulated wastewater to illustrate that the three-dimensional electrode coupled oxidant provided by the present invention is difficult to degrade. The waste water method, the steps are as follows:

[0041] (1) Put two electrode plates with a size of 5cm×11cm in the waste water treatment container. The two electrode plates are facing and parallel to each other and connected to the DC power supply. Among them, the anode plate is a titanium plate and the cathode plate is a graphite plate. , The distance between the anode plate and the cathode plate is 80mm. Add 200 mL of simulated wastewater to a wastewater treatment container with anode and cathode plates.

[0042] (2) Add manganese ferrite (MnFe 2 O 4 , MFO) particles, the amount of MFO particles added is 4g per liter of simulated wastewater, and then sodium peroxodisulfate (PS) is added in the amoun...

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Abstract

The invention belongs to the field of refractory wastewater treatment, and provides a method for processing refractory wastewater by a three-dimensional electrode coupled with an oxidant. The method comprises the following operation: adding the refractory wastewater with a pH value of 3-11 to be processed into a wastewater processing container provided with a slab anode and a slab cathode, addingthe oxidant and a particle electrode into the wastewater processing container, performing stirring to make the particle electrode in a fluidized state, starting a direct-current power supply connectedwith the slab anode and the slab cathode, and performing treatment for 15-60 min under the condition of a current density of 2-20 mA/cm<2> to complete the treatment of the refractory wastewater, wherein the particle electrode is magnetic spinel type ferrite MFe2O4 nanoparticles, and the oxidant is at least one selected from the group consisting of a persulfate, hydrogen peroxide and ozone. The method provided by the invention can effectively improve the degradation efficiency and degradation effect of the refractory wastewater while reducing the treatment costs of the wastewater.

Description

Technical field [0001] The invention belongs to the field of treatment of refractory wastewater, and relates to a method for treating refractory wastewater with a three-dimensional electrode coupled with an oxidant. Background technique [0002] Some wastewater discharged from industrial production processes usually contains a large amount of harmful and very difficult to degrade organic pollutants. Not only that, but water pollution caused by some new pollutants such as herbicide pesticides and antibiotic drugs is also an important environmental problem. Traditional biological treatment, heat treatment, adsorption, physical and chemical treatment methods and membrane treatment methods have been applied to remove these refractory organic pollutants. However, some technical defects have appeared in the actual application process, such as long reaction time and refractory pollution. The treatment effect of waste is not obvious, and the secondary pollution is serious. [0003] Advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/66C02F1/72C02F1/78C02F101/30
CPCC02F1/46114C02F1/4672C02F1/66C02F1/72C02F1/722C02F1/78C02F2201/4618C02F2001/46133C02F2101/30
Inventor 李君赖波
Owner SICHUAN UNIV
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