Magnetic sewage treatment agent and preparation method thereof

A sewage treatment agent and magnetic technology, applied in the fields of magnetic field/electric field water/sewage treatment, light water/sewage treatment, adsorbed water/sewage treatment, etc. Limited capacity and other problems, to achieve the effect of high separation and recovery rate and reuse rate, high separation and recovery rate and reuse rate, and fast separation and recovery rate

Active Publication Date: 2019-05-17
青岛洛克环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a treatment method with simple equipment, easy operation and no secondary pollution, adsorption method is currently the most promising wastewater treatment method. However, the existing conventional adsorbents have low adsorption capacity, poor stability, single function, and difficulty in separation and recovery. The problem
[0004] The output of fly ash in my country is huge. If it is not treated and placed in the environment, it will easily cause dust and pollute the environment. Fly ash is a high-temperature sintered product with a loose and porous structure and a large specific surface area. These characteristics make powder Coal ash has strong adsorption properties and can be used as an adsorption material to treat industrial wastewater. However, the direct use of fly ash for wastewater treatment has the following disadvantages: First, as fly ash is used as a powder, there will be a large degree of dust during construction. problem, and the powder is easy to aggregate after adding sewage, which reduces the contact rate between the adsorbent and wastewater, reduces the adsorption capacity, and at the same time, it is not easy to separate from the wastewater after treatment, which reduces the efficiency of wastewater treatment; Limited capacity, low adsorption capacity and adsorption stability
But purely with nano-TiO 2 As a catalyst, there are also the following problems in sewage treatment: one is that nano-TiO 2 It is easy to agglomerate itself, making nano-TiO 2 Reduced exposure to pollutants, resulting in reduced utilization
The second is nano TiO 2 The particle size is small, the density is low, it is not easy to separate from the water after sewage treatment, and it cannot be used for secondary use, resulting in waste of resources and easy to cause secondary pollution to water bodies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A magnetic sewage treatment agent, which is prepared from the following raw materials in weight percentage: 2% sodium alginate, 50% acrylamide, 11% acrylic acid, loaded nano-TiO 2 Type fly ash 10%, cyclodextrin 13% and functionalized magnetic particle 14%, its preparation method is as follows:

[0040] (1) Preparation of sodium alginate / polyacrylamide composite hydrogel: Dissolve 1g of sodium alginate in deionized water and stir to prepare a 0.5% sodium alginate solution, add 25g of acrylamide, 5.5g of polyacrylamide to the sodium alginate solution Stir the acrylic acid evenly, blow nitrogen into the reaction system, then add 0.3050 g of ammonium persulfate and 0.0366 g of ethylenediamine in sequence, and stir and react at 40°C for 8 hours to form composite hydrogel A.

[0041] (2) Chelation reaction: Dissolve cyclodextrin in deionized water to form a 20% cyclodextrin aqueous solution, add the composite hydrogel in step (1) to the cyclodextrin aqueous solution and stir ...

Embodiment 2

[0056] A magnetic sewage treatment agent, which is prepared from the following raw materials in weight percentage: 2.5% sodium alginate, 48% acrylamide, 12% acrylic acid, loaded nano-TiO 2 Type fly ash 13%, cyclodextrin 7.5%, and functionalized magnetic particles 17%, its preparation method is as follows:

[0057] (1) Preparation of sodium alginate / polyacrylamide composite hydrogel: dissolve 1.25g sodium alginate in deionized water and stir to prepare a 0.75% sodium alginate solution, add 24g acrylamide, 6g polyacrylamide to the sodium alginate solution Acrylic acid, stirred evenly, nitrogen gas was passed into the reaction system, and then 0.1500g ammonium persulfate and 0.0360g ethylenediamine were added in sequence, and the reaction was stirred at 50°C for 7h to form composite hydrogel A.

[0058] (2) Chelation reaction: Dissolve cyclodextrin in deionized water to form a 19% cyclodextrin aqueous solution, add the composite hydrogel in step (1) to the cyclodextrin aqueous so...

Embodiment 3

[0073] A magnetic sewage treatment agent, which is prepared from the following raw materials in weight percentage: 3% sodium alginate, 46% acrylamide, 13% acrylic acid, loaded nano-TiO 2 Type fly ash 15%, cyclodextrin 3%, and functionalized magnetic particles 20%, its preparation method is as follows:

[0074] (1) Preparation of sodium alginate / polyacrylamide composite hydrogel: dissolve 1.5g sodium alginate in deionized water and stir to prepare 1% sodium alginate solution, add 23g acrylamide, 6.5g of acrylic acid was stirred evenly, nitrogen gas was passed into the reaction system, and then 0.0295g of ammonium persulfate and 0.0442g of ethylenediamine were added in sequence, and the reaction was stirred at 60°C for 6h to form composite hydrogel A.

[0075] (2) Chelation reaction: Dissolve cyclodextrin in deionized water to form 18% cyclodextrin aqueous solution, add the composite hydrogel in step (1) to the cyclodextrin aqueous solution and stir for 3 hours to obtain composite...

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PUM

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Abstract

The invention discloses a magnetic sewage treatment agent and a preparation method thereof. The magnetic sewage treatment agent is prepared from 2 to 3 percent of sodium alginate, 32 to 38 percent ofacrylic amide, 11 to 13 percent of acrylic acid, 10 to 15 percent of loaded nanometer TiO2 type fly ash, 3 to 13 percent of cyclodextrin and 14 to 20 percent of functional magnetic particles. The magnetic treatment agent uses sodium alginate and polyacrylamide high polymer materials to coat the fly ash and the magnetic materials in a chemical bonding form; the advantages of flocculating agents, adsorption agents, photocatalysts and magnetic separation technology are combined; the high separation recovery rate is realized and reaches 99 percent; a good clearing effect is achieved on organic contaminants and heavy metal contaminants in sewage; the contents of COD, SS, lead, cadmium, copper, mercury, chromium (VI) and arsenic in the treated riverway sewage reach the specification in NationalStandard For Surface Water Environmental Quality in the People's Republic of China GB3838-2002; the magnetic sewage treatment agent has wide application prospects in the sewage treatment field.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a magnetic sewage treatment agent and a preparation method thereof. Background technique [0002] With the acceleration of industrialization and the improvement of human living standards, the discharge of industrial wastewater and domestic sewage is increasing, and the problem of water pollution is becoming more and more serious, which makes people pay a heavy price. Due to the complex sources of industrial wastewater and domestic sewage, such as the different components of factory wastewater, it is necessary to research and develop a technology suitable for the treatment of various pollutants. [0003] As a treatment method with simple equipment, easy operation and no secondary pollution, adsorption method is currently the most promising wastewater treatment method. However, the existing conventional adsorbents have low adsorption capacity, poor stability, single function, and di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/52C02F1/48C02F1/30C02F1/28C02F101/10C02F101/20C02F101/30
Inventor 刘华
Owner 青岛洛克环保科技有限公司
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