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Preparation method for preparing cyanobacterial magnetic trapping agent based on modification of attapulgite

A technology of attapulgite and magnetic trapping agent, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc. It can solve the problems of downstream water pollution, secondary pollution of water bodies, and high maintenance costs, and achieve The product is environmentally friendly, high adsorption efficiency, and large specific surface area

Inactive Publication Date: 2019-08-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manual fishing and collection methods are outdated, inefficient, and expensive; mechanical algae removal will pollute downstream waters, and the maintenance cost is high; chemical algae removal methods treat the symptoms but not the root cause, and are likely to cause secondary pollution to the water body; physical algae removal methods also have efficiency Low, can not large-scale algae removal and other disadvantages, there is a certain gap from the actual application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Mix 2.5g of sepiolite clay mineral with 10ml of hydrochloric acid with a molar concentration of 5mol / L, let it stand for 24h, the content of sepiolite mineral in the attapulgite clay mineral is greater than 90%, and the sepiolite clay mineral machinery Crush to less than 100 mesh powder. The product was centrifuged, washed, and dried to obtain solid 1;

[0028] Step 2: Add 0.27g FeCl 3 ·6H 2 O (ferric chloride hexahydrate) and 0.10 g FeCl 2 4H 2 O (ferrous dichloride tetrahydrate) was dissolved in 10 mL EG (ethylene glycol) to form A solution; 0.16 g NaOH (sodium hydroxide) was dissolved in 1.5 mL deionized water to form B solution.

[0029] Step 3: 0.1 g of the solid 1 obtained in step 1 and the solution A obtained in step 2 were fully stirred for 15 minutes to obtain solution C;

[0030] Step 4: Mix the B solution obtained in step 2 with the C solution obtained in step 3, transfer the mixed solution to a 250mL round bottom flask, and place it in a microwa...

Embodiment 2

[0033] Step 1: Mix 2.5g of sepiolite clay mineral with 10ml of hydrochloric acid with a molar concentration of 5mol / L, let it stand for 24h, the content of sepiolite mineral in the attapulgite clay mineral is greater than 90%, and the sepiolite clay mineral machinery Crush to less than 100 mesh powder. The product was centrifuged, washed, and dried to obtain solid 1;

[0034] Step 2: Add 0.27g FeCl 3 ·6H 2 O (ferric chloride hexahydrate) and 0.10 g FeCl 2 4H 2 O (ferrous dichloride tetrahydrate) was dissolved in 10 mL EG (ethylene glycol) to form A solution; 0.16 g NaOH (sodium hydroxide) was dissolved in 1.5 mL water (deionized water) to form B solution.

[0035] Step 3: 0.2 g of the solid 1 obtained in step 1 and the solution A obtained in step 2 were fully stirred for 30 min to obtain solution C;

[0036] Step 4: Mix the B solution obtained in step 2 with the C solution obtained in step 3, transfer the mixed solution to a 250mL round-bottomed flask, and place it in a m...

Embodiment 3

[0039] Step 1: Mix 2.5g of sepiolite clay mineral with 10ml of hydrochloric acid with a molar concentration of 5mol / L, let it stand for 24h, the content of sepiolite mineral in the attapulgite clay mineral is greater than 90%, and the sepiolite clay mineral machinery Crush to less than 100 mesh powder. The product was centrifuged, washed, and dried to obtain solid 1;

[0040] Step 2: Add 0.27g FeCl 3 ·6H 2 O (ferric chloride hexahydrate) and 0.10 g FeCl 2 4H 2 O (ferrous dichloride tetrahydrate) was dissolved in 10 mL EG (ethylene glycol) to form A solution; 0.16 g NaOH (sodium hydroxide) was dissolved in 1.5 mL water (deionized water) to form B solution.

[0041] Step 3: 0.3 g of the solid 1 obtained in step 1 and the solution A obtained in step 2 were fully stirred for 30 min to obtain solution C;

[0042] Step 4: Mix the B solution obtained in step 2 with the C solution obtained in step 3, transfer the mixed solution to a 250mL round bottom flask, place it in a microwa...

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PUM

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Abstract

The invention discloses a preparation method for preparing a cyanobacterial magnetic trapping agent based on the modification of attapulgite. The preparation method comprises the following steps: firstly, mixing an attapulgite clay mineral with an inorganic acid, standing still, centrifuging, washing and drying the product to obtain a solid 1; secondly, dissolving soluble trivalent iron salt and soluble bivalent iron salt in ethylene glycol to form a solution A, and dissolving sodium hydroxide in water to form a solution B; thirdly, fully stirring the solid 1 and the solution A to obtain a solution C; finally, mixing the solution B with the solution C, cooling and performing reflux reaction on the mixed solution under certain microwave power; after the mixture is reacted and cooled, centrifuging a sample, washing the sample with ethanol alcohol, and drying to obtain the product. According to the preparation method, the cyanobacterial magnetic trapping agent based on the modification ofthe attapulgite is synthesized by performing acidifying treatment on attapulgite clay and performing a microwave assisted mode with magnetite; the used materials are environmentally-friendly; compared with other magnetic trapping agents, the cost is relatively low; the preparation method is suitable for large-scale production and has the characteristics of simple process, rapidness, energy conservation, and environmentally-friendly product.

Description

technical field [0001] The invention relates to the technical field of preparation of nanocomposite materials, in particular to a method for preparing a cyanobacteria magnetic catcher based on attapulgite modification. Background technique [0002] With the development of science and technology, the fresh water resources used by human beings are increasing. Due to the rapid development of my country's industry, agriculture and urbanization, the discharge of domestic sewage and industrial wastewater is also increasing. However, due to the inadequacy of relevant sewage discharge measures, As a result, a large amount of wastewater is discharged into natural water bodies without treatment or treatment is not up to standard, and the wastewater contains a large amount of nutrients such as nitrogen and phosphorus, which accelerate the eutrophication of the water body, reduce the oxygen content of the water body, and grow a large number of blue-green algae , causing deterioration of w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28
CPCB01J20/12B01J20/28009C02F1/281
Inventor 于生慧王艳王倩琳
Owner SHAANXI UNIV OF SCI & TECH