Surface modified electrode and method for electrolytic treatment of wastewater

A surface modification, electrode technology, applied in the field of cathode electrode preparation, can solve the problems of poor electrode stability and durability, serious electrode corrosion, low energy efficiency, etc., to achieve no danger, enhanced corrosion resistance, service life prolonged effect

Pending Publication Date: 2021-11-26
江苏泉之源环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are many disadvantages: low energy efficiency; serious electrode corrosion; poor removal of COD and total nitrogen; poor stability and durability of electrodes

Method used

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  • Surface modified electrode and method for electrolytic treatment of wastewater
  • Surface modified electrode and method for electrolytic treatment of wastewater
  • Surface modified electrode and method for electrolytic treatment of wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: use the iron electrode of tetrapolyphosphoric acid surface modification

[0059] Step 1, prepare treatment solution:

[0060] The concentration of each component in the aqueous solution is: 1.3-3% anhydrous sodium carbonate, 0.5-1.5% sodium hydroxide, 0.8-1.5% sodium silicate, 2.5-4% sodium phosphate; stir and mix evenly to get the preparation treatment liquid.

[0061] Dissolve 3-5g of anhydrous sodium carbonate, 1-3g of sodium hydroxide, 1-4g of sodium silicate, and 4-8g of sodium phosphate in 100-300mL of distilled water in sequence, stir and mix evenly to obtain the prepared treatment solution.

[0062] The reagents selected for use in this embodiment are: soluble sodium salt and sodium hydroxide, only utilizing the higher solubility of sodium salt. The soluble sodium salt can be replaced by an equal concentration of potassium salt. Sodium hydroxide can also be replaced with potassium hydroxide which is similarly alkaline. The impact on subsequent ...

Embodiment 2

[0084] Example 2: Iron cathode material after formic acid surface modification.

[0085] The preparation method of the iron cathode material after formic acid surface modification is as follows:

[0086] Step 1, prepare treatment solution:

[0087] The concentration of each component in the aqueous solution is: 1.3-3% anhydrous sodium carbonate, 0.5-1.5% sodium hydroxide, 0.8-1.5% sodium silicate, 2.5-4% sodium phosphate; stir and mix evenly to get the preparation treatment liquid.

[0088] Dissolve 3-5g of anhydrous sodium carbonate, 1-3g of sodium hydroxide, 1-4g of sodium silicate, and 4-8g of sodium phosphate in 100-300mL of distilled water in sequence, stir and mix evenly to obtain the prepared treatment solution.

[0089] Step 2. Treat the iron pole with electricity

[0090] The iron sheet is used as the working electrode, the platinum sheet is used as the counter electrode, and the treatment liquid prepared in step 1 is used as the electrolyte, and the degreasing is ...

Embodiment 3

[0105] Example 3: Electrochemical treatment of electroplating wastewater with ruthenium titanium iridium electrode, iron electrode modified by tetrapolyphosphoric acid, and iron electrode modified by formic acid

[0106] The ruthenium titanium iridium electrode is used as the anode, the iron electrode modified by tetrapolyphosphoric acid is used as the cathode, and the iron electrode modified by formic acid is used as the cathode for electrochemical wastewater treatment:

[0107] Inject 7.5L of electroplating wastewater into the electrolytic cell. The initial COD of the electroplating wastewater is about 180mg / L, the total nitrogen is 40-50mg / L, and the ammonia nitrogen is 10mg / L. Set the current density to 5mA / cm 2 Power on and electrolyze for 3 hours.

[0108] The corresponding discharge standards for this wastewater are that COD is lower than 50mg / L, total nitrogen is lower than 15mg / L, and ammonia nitrogen is lower than 5mg / L.

[0109] Such as figure 1 , 2 It is shown ...

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Abstract

The invention discloses a surface modified electrode, a preparation method thereof, and a method for treating wastewater by electrolysis of a motor. A novel electrochemical wastewater treatment method is successfully constructed by combining a ruthenium-iridium-titanium anode and a surface-modified iron electrode material, COD and total nitrogen in various types of wastewater can be efficiently removed, grease in the wastewater can also be removed at the same time, and the application range is wide. The two electrode materials (the ruthenium-iridium-titanium anode and the surface-modified iron electrode) have relatively stable properties, are environment-friendly, are not easy to cause secondary pollution, have certain circularity, and are very worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment for environmental protection, in particular to a method for reducing COD and total nitrogen in waste water by using an electrochemical method, and also includes a preparation method of a special cathode electrode. Background technique [0002] Now with the rapid development of industry, agriculture, and aquaculture and the continuous improvement of people's living standards, the discharge of industrial sewage, agricultural sewage, and domestic sewage is gradually increasing. COD (chemical oxygen demand), total nitrogen content in water, grease, suspended solids, etc. in various wastewater will cause certain harm to the ecological environment. [0003] The COD value (chemical oxygen demand) of the wastewater is too high, and if it is directly discharged into the natural water body, it will cause the water quality of the natural water body to turn black and smelly, and then lead to the deat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/40
CPCC02F1/46109C02F1/40C02F2001/46133
Inventor 张礼知全凤娇贾法龙
Owner 江苏泉之源环境技术有限公司
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