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Method for rapidly degrading organic pollutants in water body by liquid-phase cathode plasma discharge

An organic pollutant and plasma technology, which is applied in the fields of electrochemical catalysis and sewage treatment, can solve the problems of low income, complicated process and long time consumption, and achieve the effects of low cost and energy consumption, easy acquisition and simple process.

Pending Publication Date: 2020-11-10
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the early days, conventional traditional water treatment processes were used to degrade organic sewage, such as physical methods such as adsorption and filtration. The process is complicated and time-consuming, and the income is very low
In recent years, a variety of catalytic oxidation technologies have been used in the degradation process of various organic substances. Typical examples include photocatalytic oxidation, ozone oxidation, and electrocatalytic oxidation with various composite matrix materials as anodes. Although they are also environmentally friendly, in terms of experimental conclusions It has a certain effect; but most of the advanced oxidation processes cannot be completely degraded, and can only have a relatively obvious effect on the degradation of low-concentration wastewater, and even the operating costs are high, or the electrode materials are cumbersome to make, and the reaction takes a long time. Based on the above many reasons, it is difficult to implement on a large scale

Method used

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  • Method for rapidly degrading organic pollutants in water body by liquid-phase cathode plasma discharge
  • Method for rapidly degrading organic pollutants in water body by liquid-phase cathode plasma discharge
  • Method for rapidly degrading organic pollutants in water body by liquid-phase cathode plasma discharge

Examples

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Embodiment 1

[0032] A method for rapidly degrading organic pollutants in water by liquid-phase cathode plasma discharge, comprising the following steps:

[0033] S1. Prepare 500 mL of NaCl solution with a concentration of 0.5 mol / L, add 50 mg of tetracycline hydrochloride powder and mix evenly to form an electrolyte, and place it in a shading place;

[0034] S2. Heat the electrolyte solution prepared in step S1 in a water bath at room temperature and stir it magnetically; connect the double electrode system at the same time, the double electrode anode is fully immersed in a graphite plate, and the cathode uses a nickel-titanium alloy wire with a diameter of 0.9mm , the nickel-titanium alloy wire extends into 2cm below the liquid surface, the power supply adopts a high-frequency pulse power supply, and fully stirs for 15 minutes before energizing;

[0035] S3. Turn on the power, slowly increase the voltage to 90V, power on for 2 minutes, take a sample with a dropper every 10s, and finally t...

Embodiment 2

[0039] A method for rapidly degrading organic pollutants in water by liquid-phase cathode plasma discharge, comprising the following steps:

[0040] S1. Prepare 500 mL of NaCl solution with a concentration of 0.5 mol / L, add 50 mg of tetracycline hydrochloride powder and mix evenly to form an electrolyte, and place it in a shading place;

[0041] S2. Heat the electrolyte solution prepared in step S1 in a water bath at room temperature, and stir it magnetically; connect the double electrode system at the same time, the double electrode anode is fully immersed in a graphite plate, and the cathode uses a nickel-titanium alloy wire with a diameter of 0.6mm , the nickel-titanium alloy wire extends into 2cm below the liquid surface, the power supply adopts a high-frequency pulse power supply, and fully stirs for 10 minutes before energizing;

[0042] S3. Turn on the power, slowly increase the voltage to 90V, power on for 2 minutes, take a sample with a dropper every 10s, and finally ...

Embodiment 3

[0044] A method for rapidly degrading organic pollutants in water by liquid-phase cathode plasma discharge, comprising the following steps:

[0045] S1. Prepare 500 mL of NaCl solution with a concentration of 0.5 mol / L, add 50 mg of tetracycline hydrochloride powder and mix evenly to form an electrolyte, and place it in a shading place;

[0046] S2. Heat the electrolyte solution prepared in step S1 in a water bath at room temperature and stir it magnetically; connect the double electrode system at the same time, the double electrode anode is fully immersed in a graphite plate, and the cathode adopts a nickel-titanium alloy wire with a diameter of 1.2mm , the nickel-titanium alloy wire extends into 2cm below the liquid surface, the power supply adopts a high-frequency pulse power supply, and fully stirs for 15 minutes before energizing;

[0047] S3. Turn on the power, slowly increase the voltage to 90V, power on for 1min, take a sample with a dropper every 10s, and finally turn...

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Abstract

The invention provides a method for rapidly degrading organic pollutants in a water body by liquid-phase cathode plasma discharge, which comprises the following steps of: adding a small amount of organic pollutants into a NaCl solution to serve as electrolyte by adopting a high-frequency pulse power supply and a double-electrode system taking a nickel-titanium alloy wire as a cathode and a graphite plate as an anode. Low pulse voltage is applied to cathode nickel-titanium alloy wires with different diameters, a plasma area is generated by discharging around a cathode sample, and organic pollutants in a solution are degraded in a short time. The cathode plasma generated by the method has the advantages of high activity, strong oxidizing property, no selectivity and the like, can quickly andthoroughly degrade organic pollutants in water, is low in required energy consumption and low in cost, and can be suitable for industrial wide organic sewage treatment.

Description

technical field [0001] The invention relates to a method for electrochemically degrading organic matter in water, specifically belongs to the technical field of electrochemical catalysis and sewage treatment, and in particular relates to a method for rapidly degrading organic pollutants in water by liquid-phase cathode plasma discharge. Background technique [0002] In recent years, organic pollutant wastewater produced in industrial production processes around the world has the characteristics of high toxicity, refractory degradation, long half-life in water, and wide dispersion, which has seriously affected the living environment and has endangered human health. In particular, the long-term stability of a large number of organic pollutants produced in the pharmaceutical, chemical and printing and dyeing industries has gradually accumulated residual concentrations in the environment, leading to many water pollution and other ecological and environmental problems. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F101/30C02F101/34C02F101/38
CPCC02F1/4608
Inventor 徐吉林许浩李喜宝罗军明
Owner NANCHANG HANGKONG UNIVERSITY