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Device and method for treating phenolic wastewater by ruthenium iridium tin-doped electrode electro-catalysis process

An electrocatalysis and electrode technology, which is applied in the field of electrocatalytic treatment of phenol wastewater with ruthenium-iridium-tin doped electrodes, can solve the problems of low catalytic efficiency and achieve the effects of strong reaction controllability, flexible process, and simple equipment

Inactive Publication Date: 2014-12-24
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrocatalytic efficiency in electrocatalysis is the focus of people's attention. In the prior art, due to the limitation of electrodes, the catalytic efficiency is generally not high. Therefore, the pursuit of high-efficiency electrocatalytic devices has always been the goal pursued by people.

Method used

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  • Device and method for treating phenolic wastewater by ruthenium iridium tin-doped electrode electro-catalysis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] When adopting above-mentioned device to process phenol waste water, carry out according to the following steps:

[0024] (1) Add H with a mass concentration of 1.0% to the phenol wastewater to be treated 2 S0 4 , adjust the pH value of the phenol wastewater to be treated to 3;

[0025] (2) The electrode is fixed in the reactor by the upper electrode bracket and the lower electrode bracket, and there is a gap between the electrode plate and the reactor wall to ensure the flow of wastewater to be treated, and control the micropore aeration to 1.0L / min. Adjust the stabilized power supply, control the tank voltage to 36V, the distance between the ruthenium, iridium and tin doped electrodes and the cathode plate is 1.1cm, adjust the current ≥ 1000mA, and perform electrolysis for 3h.

[0026] After testing, the effluent COD Cr From 200mg / L to 10mg / L, its COD Cr The removal rate reaches more than 95%.

Embodiment 2

[0028] When adopting above-mentioned device to process phenol waste water, carry out according to the following steps:

[0029] (1) Add H with a mass concentration of 0.8% to the phenol wastewater to be treated 2 S0 4 , adjust the pH value of the phenol wastewater to be treated to 2.5;

[0030] (2) The electrode is fixed in the reactor by the upper electrode bracket and the lower electrode bracket, and there is a gap between the electrode plate and the reactor wall to ensure the flow of wastewater to be treated, and the micropore aeration is controlled to 1.5L / min. Adjust the stabilized power supply, control the cell voltage to 34V, the distance between the ruthenium, iridium and tin doped electrodes and the cathode plate is 0.9cm, adjust the current ≥ 1000mA, and perform electrolysis for 3.5h.

[0031] After testing, the effluent COD Cr From 500mg / L to 19mg / L, its COD Cr The removal rate reaches more than 96%.

Embodiment 3

[0033] When adopting above-mentioned device to process phenol waste water, carry out according to the following steps:

[0034] (1) Add H with a mass concentration of 1.2% to the phenol wastewater to be treated 2 S0 4 , adjust the pH value of the phenol wastewater to be treated to 2;

[0035] (2) The electrode is fixed in the reactor by the upper electrode bracket and the lower electrode bracket, and there is a gap between the electrode plate and the reactor wall to ensure the flow of wastewater to be treated, and control the micropore aeration to 2.0L / min. Adjust the stabilized power supply, control the cell voltage to 38V, the distance between the ruthenium, iridium and tin doped electrodes and the cathode plate is 1.0cm, adjust the current ≥ 1000mA, and perform electrolysis for 4h.

[0036] After testing, the effluent COD Cr From 100mg / L to 3.5mg / L, its COD Cr The removal rate reaches more than 96%.

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Abstract

The invention relates to the field of treatment of difficultly treated industrial wastewater, and in particular relates to a device and a method for treating phenolic wastewater by a ruthenium iridium tin-doped electrode electro-catalysis process. The device comprises a ruthenium iridium tin-doped electrode, an upper electrode bracket, an electrode wiring column, a cathode plate, a stabilized voltage power supply, a microporous aeration head, a lower electrode bracket and a micro-sized aeration machine. When the phenolic wastewater is treated, the pH value of the phenolic wastewater is adjusted to be 2-3, the electrode is fixed in a reactor through the upper electrode bracket and the lower electrode bracket, a gap is formed between an electrode plate and the wall of the reactor to guarantee the flowing of the wastewater to be treated, the microporous aeration quantity is controlled to be 1.0-2.0 L / min, the stabilized voltage power supply is adjusted, the tank voltage is controlled to be 34-38 V, the distance between the ruthenium iridium tin-doped electrode and the cathode plate is 0.9-1.1 cm, the current is adjusted to be not less than 1,000 mA, and the electrolytic process is conducted for 3-4 hours. According to the device, the titanium-based ruthenium iridium tin-doped electrode is selected and used, the forbidden bandwidth of the electrode can be effectively reduced, the conductivity and catalytic activity of the electrode are enhanced, and the CODCr removal rate of the electrode can reach more than 95%.

Description

technical field [0001] The invention relates to the field of treatment of refractory industrial wastewater, in particular to a device and method for treating phenol wastewater by using an electrocatalytic method of ruthenium, iridium and tin doped electrodes. Background technique [0002] Phenol and its derivatives are extremely harmful to the human body and the environment due to their toxicity. Even at low concentrations, phenol may affect the liver, kidney, lung, and vascular system in the human body through inhalation, ingestion, or skin contact. Therefore, many countries It is listed as a priority pollutant and has strict requirements on its environmental concentration; for example, the relevant environmental protection laws of the United States and Brazil limit the discharge standard of total phenolic substances in water bodies below 10.0 μg / L; The maximum allowable discharge standard of phenol is below 0.5mg / L. According to the recommendation of the World Health Orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F101/34
Inventor 范荣桂赵晓亮戴艺张世强高海娟董雪姜清凤王全程王建
Owner LIAONING TECHNICAL UNIVERSITY