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Preparation method of electrode materials and wastewater treatment method

An electrode material and pretreatment technology, applied in the field of electrochemical catalysis, can solve problems such as high cost and weak cathode oxygen reduction ability, and achieve the effect of increasing process cost, increasing process complexity, and avoiding process complexity

Inactive Publication Date: 2018-10-26
GUANGDONG UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many defects in the traditional electrochemical Fenton method for wastewater treatment, such as: the cathode oxygen reduction ability is not strong, and Fe needs to be added to the solution 2+ ; Moreover, the Fenton reaction needs to be under acidic conditions. During the treatment process, the pH of the solution needs to be adjusted at all times, and the cost is relatively high

Method used

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  • Preparation method of electrode materials and wastewater treatment method
  • Preparation method of electrode materials and wastewater treatment method
  • Preparation method of electrode materials and wastewater treatment method

Examples

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Effect test

Embodiment 1

[0028] The invention provides a kind of preparation method of electrode material, and its preparation process is as follows figure 1 Shown:

[0029] 1. Soak the graphite felt in 10% dilute nitric acid solution for 2 hours, take it out, and rinse; then place it in 40g / L sodium hydroxide solution for another 2 hours, take it out, and rinse it to get the pretreated graphite felt. The active components on the surface of the graphite felt can be removed by repeated acid washing and alkali washing.

[0030] 2. Soak the pretreated graphite felt in a saturated ethanol solution of 2-ethylanthraquinone for 24 hours, carry out anthraquinone surface modification, then wash with ethanol and water in sequence, and dry naturally to obtain the first modified graphite felt.

[0031] 3. FeCl 3 ·6H 2 O was dissolved in deionized water to prepare a ferric chloride solution with a concentration of 3 mg / mL for use; NaBH 4 Dissolve in deionized water to prepare NaBH with a concentration of 15mg...

Embodiment 2

[0034] 1. Grouping

[0035] Get the graphite felt after the pretreatment of embodiment 1 as negative electrode, set as matched group 1;

[0036] Get the first modified graphite felt of embodiment 1 as negative electrode, set as control group 2;

[0037] Get the final product of embodiment 1 as negative electrode, set as test group.

[0038] 2. Wastewater samples

[0039] The wastewater was obtained from a secondary sedimentation tank for livestock and poultry breeding wastewater in Guangdong Province.

[0040] 3. Wastewater electrolysis

[0041] use as image 3 The electrolysis device shown in the figure performs electrolysis on wastewater, uses carbon rod as anode, saturated calomel electrode as reference electrode, and cathode potential of -0.75V (relative to saturated calomel electrode), and performs electrolysis test on wastewater samples. During the test, the pH was not adjusted (the pH of the solution was measured as neutral before the test), and Fe was not added to...

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Abstract

The invention belongs to the technical field of electrochemical catalysis and particularly relates to a preparation method of electrode materials and a wastewater treatment method. The preparation method includes: soaking graphite felt in dilute acid and dilute alkaline sequentially to remove active ingredients on the surface of the graphite felt to obtain the pretreated graphite felt; placing thepretreated graphite felt in a saturated solution of anthraquinone for soaking to obtain a first modified graphite felt; placing the first modified graphite felt in a ferric trichloride solution and slowly dripping a NaBH4 solution to the same to react completely to make the surface of the first modified graphite felt loaded with iron oxide, wherein the NaBH4 solution is 0.45mL / s-0.55mL / s in dripping speed. The electrode materials serve as cathodes used for electrolyzing organic matter in oxidation water, the addition of iron ions to the solution can be avoided in the actual electrical fentontreatment of wastewater, increasing of process complexity is avoided, and increasing of process cost by adjusting the pH value is avoided.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a method for preparing an electrode material and a method for treating wastewater. Background technique [0002] Electrochemical cathodic oxidation is an efficient, practical, and non-secondary pollution-free advanced oxidation technology. It has broad application prospects in the field of refractory wastewater treatment, and has become a research hotspot in the field of industrial wastewater treatment in recent years. [0003] The traditional wastewater treatment method is mainly the electrochemical Fenton method, the oxygen in the cathode solution obtains electrons at the cathode to generate H 2 o 2 , H 2 o 2 with Fe in solution 2+ The reaction generates hydroxyl radicals (·OH) with a high redox potential, and the hydroxyl radicals (·OH) oxidize organic matter in water, thereby achieving the purpose of treating polluted water bodies. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/30
CPCC02F1/46104C02F1/46109C02F1/4672C02F2001/46133C02F2001/46142C02F2101/30C02F2209/08
Inventor 匡超智许燕滨谢光炎潘湛昌郑莉
Owner GUANGDONG UNIV OF TECH
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