Preparation method of magnetic compound nanometer Fe3O4 flocculating agent and water treatment application

A magnetic composite nano, iron oxide technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc.

Inactive Publication Date: 2011-11-23
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the preparation of magnetic composite nano-iron oxide flocculants and their application in the field of wastewater treatment.

Method used

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  • Preparation method of magnetic compound nanometer Fe3O4 flocculating agent and water treatment application
  • Preparation method of magnetic compound nanometer Fe3O4 flocculating agent and water treatment application
  • Preparation method of magnetic compound nanometer Fe3O4 flocculating agent and water treatment application

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Experimental program
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Effect test

Embodiment 1

[0021] Magnetic Composite Nano Fe 3 o 4 Preparation of flocculant

[0022] (1) Weigh 0.01mol / L FeCl 2 4H 2 O and 0.02mol / L FeCl 3 ·6H 2 O was poured into the four-necked flask reactor, and 200ml of ultrapure water was added;

[0023] (2) in N 2 Under protective conditions, add 50ml of concentrated ammonia water with a mass fraction of 25% to 28% until the pH value of the system is >10;

[0024] (3) After reacting to black, add Al according to the molar ratio (Al / Fe) of the added aluminum atom to the iron atom in the synthesis system of 0.5 2 (SO 4 ) 3 18H 2 O, raise the temperature to 50°C for 30 minutes;

[0025] (4) The temperature was raised to 80° C., and reacted for 1 hour at a stirring speed of 1000 r / min;

[0026] (5) Separate the black solid with a strong magnet, wash it alternately with ultrapure water and absolute ethanol until neutral, dry it in vacuum at 70°C for 12 hours, and grind to obtain the magnetic composite nano-Fe 3 o 4 flocculant.

Embodiment 2

[0028] Magnetic Composite Nano Fe 3 o 4 Flocculant treatment of steelmaking wastewater and separation with high-efficiency magnetic separation device

[0029] According to the dosage of 100mg / L, the magnetic composite nano-iron oxide flocculant is added to the steelmaking wastewater, stirred quickly at the speed of 300r / min for 2min, then stirred slowly at the speed of 40r / min for 10min, and then the wastewater passes through the high-efficiency The magnetic separation device, after pre-magnetization, forms magnetic seeds and magnetic flocs, then separates the nano-flocculation agent, and measures the turbidity and COD value of the effluent. The results showed that the removal rate of turbidity and COD reached above 95% and 80% respectively.

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Abstract

The invention relates to a preparation method of a magnetic nanometer Fe3O4 compound flocculating agent and water treatment magnetic separation application, belonging to the technical field of waste water treatment. In the preparation method, iron dichloride, iron chloride, aluminum sulfate and concentrated ammonia water are taken as main raw materials, the magnetic compound nanometer Fe3O4 flocculating agent is prepared by adopting a coprecipitation method, and the magnetic compound nanometer iron oxide flocculating agent is applied to waste water treatment. The method has the advantages of high yield, low cost, easiness for operation, no secondary pollution and good treating effect on typical pollutants in industrial waste water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment. Nano-Fe was prepared by co-precipitation method 3 o 4 Composite flocculant, used for wastewater treatment, and finally separated by magnetic separation technology. Background technique [0002] With the development of nanotechnology, nanomaterials have become an indispensable and important field in the development of current material science. With the rapid development of my country's social economy, the pollution of my country's water environment is becoming more and more serious, and the water quality is deteriorating day by day. Traditional flocculants can no longer meet the requirements for water purification of sewage. At present, due to the poor removal of organic or toxic and harmful pollutants by inorganic flocculants, the high cost of organic polymer flocculants, and cumbersome operations, it is always difficult to make breakthroughs in the research of high-efficiency flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 田秉晖罗九鹏辛丽花刘徽王国田贾大伟苏敏
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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