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A kind of electrochemical wastewater treatment method

A wastewater treatment and electrochemical technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of inconvenient operation, low stability, etc. The effect of fast and efficient wastewater purification treatment

Active Publication Date: 2018-07-13
上海开山中夏节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because there is above-mentioned problem in Fenton method, thereby this method stability is not high, it is also inconvenient to operate, therefore, those skilled in the art devote oneself to to develop a kind of simple and efficient treatment method of organic phosphorus wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Electrode preparation:

[0034] 1) Pretreatment of grinding, degreasing and acid etching on the titanium substrate;

[0035] 2) Preparation of SnCl 4 with HfCl 4 A mixed ethanol solution as a precursor, in which SnCl 4 The concentration is 0.3mol / L, SnCl 4 , HfCl 4 The concentration is 0.03mol / L;

[0036] 3) Apply the precursor solution to the surface of the titanium substrate by brushing, then dry at 90-100° C. for 10 minutes, sinter at 500° C. for 15 minutes, and cool.

[0037] Step 3) was repeated 4 times, and the last sintering time was extended to 30 minutes to obtain electrode A.

Embodiment 2

[0039] Electrode preparation:

[0040] 1) Pretreatment of grinding, degreasing and acid etching on the titanium substrate;

[0041] 2) Preparation of SnCl 4 with HfCl 4 A mixed ethanol solution as a precursor, in which SnCl 4 The concentration is 0.5mol / L, SnCl 4 , HfCl 4 The concentration is 0.01mol / L;

[0042] 3) Apply the precursor solution to the surface of the titanium substrate by brushing, then dry at 90-100° C. for 10 minutes, sinter at 550° C. for 15 minutes, and cool.

[0043] Step 3) was repeated 10 times, and the last sintering time was extended to 30 minutes to obtain electrode B.

Embodiment 3

[0045] Electrode preparation:

[0046] 1) Pretreatment of grinding, degreasing and acid etching on the titanium substrate;

[0047] 2) Preparation of SnCl 4 with HfCl 4 The mixed diethanol methyl ether solution is used as a precursor, where SnCl 4 The concentration is 0.8mol / L, SnCl 4 , HfCl 4 The concentration is 0.008mol / L;

[0048] 3) Brush the precursor solution onto the surface of the titanium substrate by brushing, then dry at 90-100°C for 10 minutes, sinter at 600°C for 15 minutes, and cool.

[0049] Step 3) was repeated 15 times, and the last sintering time was extended to 30 minutes to obtain electrode C.

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PUM

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Abstract

The invention discloses an electrochemical wastewater treatment method. According to the method, titanium coated with a tin-hafnium oxide coating on the surface is taken as an anode, stainless steel is taken as a cathode, organophosphorus-containing wastewater is treated through electrolysis, phosphite in the wastewater is oxidized into phosphate, and then iron phosphate is precipitated out through addition of polyferric sulfate. The method has the advantages of simple operation and low cost, 99.5% or more of phosphite in the wastewater can be converted into orthophosphate, the content of phosphorus in the treated wastewater is reduced to 0.5 ppm or lower, the tin-hafnium oxide coating has good electrical conductivity and corrosion resistance, the free radical production rate is high, the current efficiency is high, and hafnium oxide in the coating can improve the stability of electrodes greatly, so that the service life of each electrode is prolonged.

Description

technical field [0001] The invention relates to an electrochemical wastewater treatment method, in particular to a method for electrochemical treatment of organic phosphorus wastewater. Background technique [0002] In recent years, my country's wastewater discharge standards have become more and more stringent, and the treatment efforts have become more and more intensive. The methods currently used to treat environmental wastewater are traditional treatment methods, including physical treatment methods and chemical treatment methods. However, these methods are ineffective for the treatment of toxic, recalcitrant pollutants, such as synthetic dyes widely used in silk products, spraying process, printing and dyeing industry and food technology. [0003] Many enterprises use advanced treatment processes for wastewater treatment to meet the new wastewater discharge standards, such as ozone treatment, Fenton treatment, membrane treatment, electric adsorption, etc. At present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461
CPCC02F1/461C02F2001/46138
Inventor 潘凡峰
Owner 上海开山中夏节能环保科技有限公司