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Method for iron internal electrolysis treatment of hard-degradation organic wastewater strengthened by magnetic catalyst and used fillings thereof

A magnetic catalyst, organic wastewater technology, applied in the fields of magnetic field/electric field water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. The effect of reducing volume and large specific surface area

Inactive Publication Date: 2011-06-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, although various existing methods have made some progress in solving the problem of iron-carbon internal electrolysis for wastewater treatment, they have not completely solved the limitations of internal electrolysis.

Method used

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  • Method for iron internal electrolysis treatment of hard-degradation organic wastewater strengthened by magnetic catalyst and used fillings thereof

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Effect test

Embodiment 1

[0034] Ferrous chloride and ferric chloride are used as raw materials, and the molar ratio is Fe 2+ : Fe 3+=1:1 solution, add 100-mesh powdery nucleating substance, stir well, heat the solution to 60°C, add sodium hydroxide to PH=12 under continuous stirring, place it in a water bath at 95°C for 4 hours, Wash the product with deionized water until neutral, after magnetic separation, dry at 130°C for 4 hours, add potassium sodium tartrate 80g / L, sodium carbonate 15g / L, copper sulfate 10g / L, sodium hydroxide 25g / L copper salt solution medium, fully stirred, water bath to 35°C, added formaldehyde under rapid stirring until its concentration in the copper salt was 8g / L, stirred for 40 minutes, washed with deionized water until neutral, and dried to make copper-plated magnetic particles. The prepared copper-plated magnetic particles and iron filings were weighed at a mass ratio of 1:10, and the air flow rate (that is, the aeration rate, the same below) was 20 L / min, and the reacti...

Embodiment 2

[0036] Ferrous sulfate and ferric sulfate are used as raw materials, and the molar ratio is Fe 2+ : Fe 3+ =1:1 solution, add 200-mesh powdery nucleating substance, stir well, heat the solution to 80°C, add sodium hydroxide to pH=13 under continuous stirring, place it in a water bath at 100°C for 3 hours, Wash the product with deionized water until neutral, after magnetic separation, dry at 160°C for 3 hours, add potassium sodium tartrate 100g / L, sodium carbonate 30g / L, copper sulfate 20g / L, sodium hydroxide 35g / L copper salt solution medium, fully stirred, water bath to 45°C, add formaldehyde under rapid stirring until its concentration in the copper salt is 12g / L, stir for 30 minutes, wash with deionized water until neutral, and dry to make copper-plated magnetic particles. The prepared copper-plated magnetic particles and iron filings were weighed with a mass ratio of 1:6, and the air flow rate was 15L / min, and the reaction time was 3h, and the COD of pH=3 was 1340mg / L p-ni...

Embodiment 3

[0038] Ferrous chloride and ferric sulfate are used as raw materials, and the molar ratio is Fe 2+ : Fe 3+ =1:1 solution, add 100-mesh powdery nucleating substance, stir fully, heat the solution to 70°C, add potassium hydroxide to pH=12 under continuous stirring, place it in a water bath at 98°C for 3 hours, Wash the product with deionized water until neutral, after magnetic separation, dry at 150°C for 4 hours, add potassium sodium tartrate 90g / L, sodium carbonate 20g / L, copper sulfate 15g / L, sodium hydroxide 30g / L copper salt solution medium, fully stirred, water bath to 40°C, added formaldehyde under rapid stirring until its concentration in the copper salt was 10g / L, stirred for 50 minutes, washed with deionized water until neutral, and dried to make copper-coated magnetic particles. The prepared copper-plated magnetic particles and iron filings were weighed at a mass ratio of 1:7. Under the conditions of an air flow rate of 20 L / min and a reaction time of 3 h, the COD of...

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Abstract

The invention discloses a method for iron internal electrolysis treatment of hard-degradation organic wastewater in strengthened by magnetic catalyst and used fillings thereof, relating to the technical field of treatment methods of hard-degradation organic wastewater. The method comprises the following steps: a. preparing powdery copperized magnetic particles; b. introducing wastewater with the pH value being adjusted to 3 to 5 into a magnetic catalyst iron internal electrolysis bath in which mixed fillings of powdery copperized magnetic particles and scrap iron at the weight ratio of 1:6 to10, and completely stirring the fillings by controlling the amount of aeration; and c. fast separating solid from liquid in the treated wastewater with electromagnet. The method has the advantages oflow cost required, stable operating effect and high treating efficiency. Compared with the conventional method for internal electrolysis treatment of hard-degradation organic wastewater, the speed isimproved by 4 to 5 times, and the COD removing ratio in the same condition is increased by 40% to 50%.

Description

technical field [0001] The invention relates to a treatment method for refractory organic industrial wastewater, and a filler used in the treatment process and a preparation method for the filler. Background technique [0002] Water pollution is one of the major environmental problems facing the world today. Industrial wastewater is the main pollution source of water environment pollution, and industrial wastewater is mainly refractory organic wastewater. Especially with the rapid development of chemical industry, the pollution sources of organic wastewater are increasing day by day. Organic wastewater has high COD and low BOD, and often contains aromatic compounds, heterocyclic compounds, sulfides, nitrogen compounds and other toxic substances. Therefore, organic wastewater has a large degree of environmental pollution and is difficult to treat and purify. [0003] For the treatment of refractory organic wastewater, commonly used methods mainly include solvent extraction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461H01F1/09C02F1/48B03C1/00
Inventor 司士辉肖克黄明智黄可龙
Owner CENT SOUTH UNIV
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