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Preparation method for activated carbon aerogel electrode loaded with iron with mixed valences and applications

A technology of carbon airgel and mixed valence state, which is applied in the field of water treatment, can solve problems such as hindering wide application, complicated treatment process, and poor treatment effect, and achieve stable and high efficiency, improved dispersion, and increased in-situ production Effect

Inactive Publication Date: 2015-01-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pH of the current electro-Fenton treatment method is better in the range of 2 to 4, while under near-neutral conditions, iron ions are prone to precipitate and lose their catalytic effect, and the treatment effect becomes poor; and the subsequent neutralization treatment produces a large amount of For iron sludge, the treatment process becomes complicated and the treatment cost increases, which hinders its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of carbon airgel

[0031] The sol-gel phenolic polymerization method uses resorcinol and formaldehyde as raw materials and sodium carbonate as a catalyst to obtain a phenolic resin with a network structure at a molar ratio of 1:2:0.008:17.5; The appearance size of the electrode material is required to prepare the mold. The mold is generally a test tube with a diameter of 1.5cm and a length of about 20cm. The rod-shaped phenolic resin obtained after standing still is subjected to solvent replacement in acetone with low surface tension for 5 days, and the water molecules in the network structure are replaced by acetone, and then dried at room temperature, which takes about 5 days. The dried airgel was heated up to 950 °C in a tube furnace and kept for 4 h for carbonization to obtain black rod-shaped carbon airgel.

[0032] (2) Activation of carbon aerogels

[0033] The carbon aerogel prepared in step (1) is raised to 850° C. in a tube furnace at a rate o...

Embodiment 2

[0037] The Fe(mix) / ACA electrode was used for the electrosorption-Fenton process to treat wastewater containing the pesticide imidacloprid to achieve rapid and efficient removal of pollutants.

[0038] The degradation device uses the Fe(mix) / ACA electrode as the cathode, and the BDD electrode as the anode, and uses a DC regulated power supply to provide the required voltage, and controls the constant potential voltage -30~+20V. The relevant process parameters in the above method are: the water sample processing volume is 30-100ml, the electrode area can be 2-10cm2, the electrode distance is kept at 0.5-3cm, and the potential of the working electrode is controlled at -30-+10V. In the above method, constant potential electrosorption is carried out, and the treatment time is between 20-60 minutes. In the actual application process, the corresponding treatment time is controlled according to the nature of the treated wastewater, the water volume and the electrode area, so as to mee...

Embodiment 3

[0040] Fe(mix) / ACA electrode was used in the electrosorption-Fenton process to treat wastewater containing antiepileptic drug carbamazepine to achieve rapid and efficient removal of pollutants.

[0041] The degradation device uses the Fe(mix) / ACA electrode as the cathode, and the BDD electrode as the anode, and uses a DC regulated power supply to provide the required voltage, and controls the constant potential voltage -30~+20V. The relevant process parameters in the above method are: the water sample processing volume is 30-100ml, the electrode area can be 2-10cm2, the electrode distance is kept at 0.5-3cm, and the potential of the working electrode is controlled at -30-+10V. In the above method, constant potential electrosorption is carried out, and the treatment time is between 20-60 minutes. In the actual application process, the corresponding treatment time is controlled according to the nature of the treated wastewater, the water volume and the electrode area, so as to me...

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Abstract

The invention relates to a preparation method for activated carbon aerogel electrode loaded with iron with mixed valences and applications. Iron with mixed valences obtained through hydro-thermal oxidation process is loaded on a surface of a matrix with high specific surface area and prepared through CO2 activating treatment, A Fe(mix) / ACA combined electrode is constructed. The electrode is used as a cathode in electro-adsorption auxiliary electro-Fenton, and degrades organic pollutants rapidly. Compared to the prior art, the activated carbon aerogel electrode loaded with iron with mixed valences has advantages of high poriness, large specific surface area, high conductivity, controllable appearance shape and the like. In addition, the electrode has good electro-Fenton catalytic activity, and is suitable for rapid degradation of organic waste water by electro-adsorption-Fenton catalytic oxidation. Under the action of electro-adsorption auxiliary enhancement, pollutants in sewage is degraded and removed efficiently and thoroughly. The technology has simple operation, is low-cost, is a new, efficient and energy saving technology and has wide economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method of an Fe(mix) / ACA electrode and the application of the electro-Fenton method to degrade organic waste water under the synergy of electro-adsorption. Background technique [0002] The aggravation of water pollution and the scarcity of water resources have become hot issues today. How to quickly and effectively deal with pollutants in water bodies has always been a topic that environmental protection workers have been working hard to explore. In recent years, ozone (O 3 ) oxidation, electrochemical oxidation, photocatalytic oxidation, ultrasonic collaborative oxidation and other advanced oxidation technology (Advanced Oxidation Processes referred to as AOP) has provided us with a new idea to deal with pollutants in water. The most notable feature of advanced oxidation technology is that hydroxyl radicals (OH) are the main oxidant. This tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F1/72
Inventor 赵国华王宇晶赵红颖柴守宁王亚波
Owner TONGJI UNIV
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