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Method for catalytically degrading organic pollutants by zero-valent iron

A catalytic degradation, zero-valent iron technology, applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc. effect of effect

Inactive Publication Date: 2020-12-15
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The existing persulfate activation methods have relatively high costs

Method used

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  • Method for catalytically degrading organic pollutants by zero-valent iron
  • Method for catalytically degrading organic pollutants by zero-valent iron
  • Method for catalytically degrading organic pollutants by zero-valent iron

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Embodiment Construction

[0040] A method for catalytically degrading organic wastewater using zero-valent iron, comprising:

[0041] 1) Add iron powder and persulfate to organic wastewater for ultrasonic treatment;

[0042] 2) After the reaction is complete, the treated organic wastewater is obtained.

[0043] In some examples, the added amount of the iron powder is not less than 0.1 mg / L.

[0044] In some examples, the iron powder is added in an amount of 0.1-0.5 mg / L. When the amount of iron powder added exceeds a certain limit, it will not bring more positive effects to the progress of the reaction. The amount of iron powder added also has a certain relationship with the particle size of iron powder. The particle size of iron powder is small, and the amount of iron powder added can be relatively reduced; on the contrary, the amount of iron powder added should be increased accordingly.

[0045] In some examples, the particle size of the iron powder is not greater than 1 mm. The finer the particle...

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Abstract

The invention discloses a method for catalytically degrading organic pollutants by zero-valent iron. The method comprises the steps of adding iron powder and persulfate into organic wastewater, and carrying out ultrasonic treatment to degrade the organic pollutants. Some embodiments of the invention have good organic pollutant degradation effects under acidic and alkaline conditions, have a wide application range, and are especially suitable for treatment of printing and dyeing wastewater. Low-cost iron powder is used for catalyzing the advanced oxidation reaction of persulfate, so that a large amount of iron sludge is prevented from being generated, and the treatment cost of the organic wastewater is remarkably reduced.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a treatment process for organic waste water, in particular to a method for catalyzing and degrading organic pollutants by zero-valent iron. Background technique [0002] Environmental pollution and governance are inevitable challenges and problems in the development of the world today. Environmental pollution has severely affected and harmed animals and plants in the ecological environment. Among them, improper treatment of dye wastewater has caused unpredictable impacts on the ecological environment. Dyes are often used in textile, paper, food, pharmaceutical and other industries. Dyes have a complex structure, and many of them are variants. They come from a wide range of sources. Most of the dyes are made from carcinogens. If they are discharged into water bodies without treatment, studies have shown that some dyes will continue to pass through the food chain. accumulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/36C02F101/30C02F101/38
CPCC02F1/722C02F1/725C02F1/36C02F2101/308C02F2101/38
Inventor 殷旭东李德豪谢文玉王儒珍毛玉凤刘志森朱越平刘正辉黄梅
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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