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Process and equipment based on electric persulfate activation technology

A technology for activating persulfate and technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment equipment, etc. Improve activation effect, reduce activation cost, simple operation effect

Active Publication Date: 2021-08-17
JIANGSU DDBS ENVIRONMENT REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 2018105186217 discloses a device and method for simultaneously generating persulfate and its activator ferrous ions by electrolysis, but in actual operation, due to the It is difficult to quickly adjust the size of the area and possible failures, and it is almost impossible to quantitatively control it during the activation of persulfate

Method used

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  • Process and equipment based on electric persulfate activation technology
  • Process and equipment based on electric persulfate activation technology
  • Process and equipment based on electric persulfate activation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0042] Implementation Case 1 Step 1. Take the soil from the contaminated site of a steel factory site. See the 01 sample in Table 1 for the types and concentrations of pollutants. Accurately weigh 3 soil samples, each 300g, numbered 01, 1A, 1B, of which 01 is a blank sample.

[0043] Step 2. Under laboratory conditions, the thickness of the anode is 2mm, and the surface size is 150×20mm 2 sheet of iron. The thickness of the cathode material is 5mm, and the surface size is 150×20mm 2 activated carbon fiber blanket. The power supply between the anode and the cathode is an adjustable phase-shifted full-bridge DC power supply, and the maximum output voltage is 36V. The inert electrode at the bottom is a graphite rod of Φ10mm, connected and connected in series with a 0.1-9999.9Ω high-precision variable resistor with a minimum step value of 0.1Ω.

[0044] Step 3, adding concentration of 20% Na in the anode and cathode beakers respectively 2 S 2 o 8 The solution was 200ml and ...

Embodiment example 2

[0051] Step 1. Take the polluted groundwater from the polluted site of a coal gas plant ruins. See the sample 02 in Table 2 for the types and concentrations of pollutants. Accurately measure 5 water samples, each 200ml, numbered 02, 22A, 22B, 33A, 33B, of which 02 is a blank sample.

[0052] Steps 2 and 3 are the same as those in Case 1.

[0053] Step 4. After energizing for 10 minutes, take 50ml of activated Na from the anode beaker without power on. 2 S 2 o 8 Add the solution into 22A and stir evenly, let it stand, take 50ml activated Na from the cathode beaker 2 S 2 o 8 The solution was added to 22B and stirred evenly, and allowed to stand. At this time, it is also seen that there are a large number of bubbles in the sample, indicating that the reaction is relatively violent.

[0054] After step 5 and 150 minutes, samples 22A and 22B were taken for inspection respectively, and the experimental data are shown in Table 2.

[0055] Table 2 Experimental data (μg / L)

[...

Embodiment example 3

[0058] On the basis of the completion of the implementation case 2, cut off the power for 5 minutes, and take 50ml of activated Na from the anode beaker 2 S 2 o 8 Add the solution into 33A and stir evenly, let it stand, take 50ml activated Na from the cathode beaker 2 S 2 o 8 The solution was added to 33B and stirred evenly, and allowed to stand. At this time, it is also seen that there are bubbles in the sample, but it is not as violent as in Example 2, indicating that after a period of time, the bubbles in the medicament A part may be lost, the experimental data are shown in Table 2.

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Abstract

The invention discloses a process and equipment based on an electric persulfate activation technology. The equipment comprises an anode reaction kettle, a cathode reaction kettle, an adjustable direct-current power supply and a high-precision variable resistor; an anode electrode capable of moving up and down is arranged on the anode reaction kettle; a cathode electrode is arranged on the cathode reaction kettle; the anode electrode and the cathode electrode are electrically connected with the positive electrode and the negative electrode of the adjustable direct-current power supply respectively; the positions, close to the bottoms, of the side walls of the anode reaction kettle and the cathode reaction kettle are each provided with a bottom inert electrode, the two bottom inert electrodes are electrically connected through a wire, and the high-precision variable resistor is connected between the wires in series. By accurately controlling the depth of the anode electrode in the medicament, the voltage of the adjustable direct-current power supply and the resistance of the high-precision variable resistor, the electric activation current can be effectively controlled, the speed and quality of the electric activation of the persulfate are further controlled, and the method is easy to operate and has wide engineering and market prospects.

Description

technical field [0001] The invention discloses a technique and equipment based on the electric activation persulfate technology, which belongs to the field of environmental restoration. Background technique [0002] The use of chemical oxidation technology to remove toxic and harmful substances in the environment is a common environmental restoration method. Advanced oxidation is based on active free radicals OH and Oxidation technology, which has efficient degradation performance on organic pollutants in the environment, while other chemical oxidation technologies do not have this advantage. Compared with H, which is commonly used as a source of oxidative free radicals 2 o 2 , persulfate has the characteristics of easy storage and stability. And based on Fe 2+ The activated persulfate system has gradually become a research hotspot because of its green and friendly properties, but Fe 2+ The biggest disadvantage of the activated persulfate system is the formation of Fe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/461
CPCC02F1/72C02F1/4672C02F2001/46133C02F2201/46105C02F2201/46135C02F2201/4614C02F2201/4617C02F2209/06Y02W10/37
Inventor 曾跃春刘志阳沈诣仓龙郭都郭宝蔓张坚毅
Owner JIANGSU DDBS ENVIRONMENT REMEDIATION
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