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Magnetic-field-strengthening iron-carbon-microelectrolysis method for treating organic pollutants in landfill leachate

A technology of iron-carbon micro-electrolysis and landfill leachate, which is applied in the fields of magnetic field/electric field water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the toxic by-products of chemical oxidation method, which is difficult to meet the purification requirements and constraints Development and application issues, to achieve the effect of shortening the reaction settling time, broadening the application range, and improving the utilization rate

Inactive Publication Date: 2016-01-13
BEIJING VOCATIONAL COLLEGE OF AGRI +1
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AI Technical Summary

Problems solved by technology

Each organic pollutant treatment method has disadvantages to varying degrees: the biological method has a long cycle, and it is difficult to meet the purification requirements for the treatment of some organic pollutant wastewater that is difficult to biodegrade; the chemical oxidation method may produce toxic by-products The disadvantages of physical and chemical methods are low removal rate, high operating costs, and possible secondary pollution; electrocatalytic oxidation requires an external electric field, which restricts the development and application of this method to a certain extent
At present, there is no report on the removal of organic pollutants in landfill leachate by magnetic field-enhanced iron-carbon micro-electrolysis process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Under the condition that the magnetic field strength of the low-temperature superconducting magnet is 50mT, it is added to the landfill leachate with an initial COD concentration of 3000mg / L, according to the standard of iron-carbon ratio 1:1, each 15mg / L, and the reaction time is 10min. The removal rate of COD reaches 41.35%. And under the same condition without magnetic field, the removal rate of COD is 28.46%.

Embodiment 2

[0026] Under the condition that the magnetic field strength of the low-temperature superconducting magnet is 50mT, it is added to the COD solution with an initial concentration of 3000mg / L according to the iron-carbon ratio of 1:1, each 15mg / L standard, and the reaction time is 90min. The removal rate of COD reaches 59.76%. And under the same condition without magnetic field, the removal rate of COD is 42.45%.

Embodiment 3

[0028] Under the condition of a magnetic field strength of 50mT, to the landfill leachate liquid with an initial COD concentration of 3000mg / L, according to the iron-carbon ratio of 1:1, each 15mg / L is added according to the standard, and the reaction time is 150min. The removal rate of COD reaches 65.32%. And under the same condition without magnetic field, the removal rate of COD is 46.95%.

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Abstract

The invention relates to a magnetic-field-strengthening iron-carbon-microelectrolysis method for treating organic pollutants in landfill leachate. The method comprises the steps of externally applying a magnetic field to the surrounding of a reaction tank, adding zero-valent iron and granular activated carbon into organic matter polluted wastewater in the reaction tank, and purifying the water under external-force stirring. According to the method, the organic pollutants in the landfill leachate can be effectively removed, the utilization ratio of the iron and the carbon is increased, the consumption of reagents is lowered, and the rate of reaction is accelerated. Once the reaction starts, the operation is simple and convenient and is easy to control; and the method is economical.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for degrading organic pollutants in landfill leachate by strengthening iron-carbon micro-electrolysis with a magnetic field. Background technique [0002] Relevant reports at home and abroad show that organic pollutants are one of the main pollutants in landfill infiltration. There are many kinds of organic matter in landfill infiltration, with complex components and high concentration, and most of them are toxic, especially persistent organic pollutants and new organic pollutants. These organic pollutants not only have "three causes" effects, but also have endocrine disrupting effects. At present, there are mainly the following types of organic pollutant treatment technologies: biological treatment technology, chemical oxidation technology, physical and chemical technology and catalytic oxidation technology. Each organic pollutant treatment m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/48
Inventor 李英军龚斌彭星席北斗赵颖高如泰李瑞李晓光郝艳杨天学李曹乐王丽君
Owner BEIJING VOCATIONAL COLLEGE OF AGRI
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