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Magnetic chitosan attapulgite algae-removing flocculant and preparation method thereof

A technology of attapulgite and flocculant, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of limited nitrogen and phosphorus removal ability, inability to reduce algae growth rate, The flocculation effect is difficult to be guaranteed, etc., to achieve the effect of rapid sedimentation and algae removal, good algae removal effect, and rapid algae removal effect

Active Publication Date: 2020-08-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the algae cells may be damaged in an acidic or alkaline environment and lose their own characteristics, the flocculation effect is difficult to be guaranteed, and the ability to remove nitrogen and phosphorus in the water body is limited, and the growth rate of algae in the water body cannot be reduced.

Method used

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  • Magnetic chitosan attapulgite algae-removing flocculant and preparation method thereof
  • Magnetic chitosan attapulgite algae-removing flocculant and preparation method thereof
  • Magnetic chitosan attapulgite algae-removing flocculant and preparation method thereof

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preparation example Construction

[0048] Its specific preparation method comprises the following steps:

[0049] S1) preparing magnetic chitosan microspheres;

[0050] S11) Preparation of ferrofluid: FeCl 3 ·6H 2 O and FeCl 2 4H 2 O was separately dissolved in deionized water to FeCl 3 ·6H 2 O solution and FeCl 2 4H 2 O solution, and then mixed with deionized water at 50~60°C to form a mixed solution with a molar concentration of 1:1; slowly add ammonia water to the mixed solution in a constant temperature water bath at 40~50°C, and stir at a high speed at the same time, the reaction is complete After settling, remove the supernatant to obtain a magnetic fluid, and wash it with ammonia water and deionized water several times; the washed magnetic fluid is ultrasonically stirred with a hydrated sodium oleate solution at a temperature of 40~50°C to obtain a dispersed magnetic fluid;

[0051] S12) According to the volume ratio of 10:1:2:40, measure chitosan acetic acid solution, magnetic fluid, SPAN-80, an...

Embodiment 1

[0062] The specific preparation steps of the magnetic chitosan attapulgite algae-removing flocculant of the present invention are as follows:

[0063] S1) Preparation of Magnetic Chitosan Microspheres

[0064] S11) Weigh 15.00g FeCl 3 ·6H 2 O, then added to deionized water and stirred to dissolve to obtain FeCl 3 ·6H 2 O solution; weigh 10.95g FeCl 2 4H 2 O, then add deionized water and stir to dissolve to obtain FeCl 2 4H 2 O solution; then the prepared FeCl 3 ·6H 2 O solution and FeCl 2 4H 2 After the O solution is mixed, add it to 55°C deionized water to make a 150mL mixed solution; then, under the condition of heating in a constant temperature water bath at 45°C, while stirring, add 150mL of dilute ammonia water dropwise at a speed of 9mL / min, and the dropwise addition is completed. Finally, stir at high speed for 30 minutes to make the reaction complete, and then pass the magnet to settle the generated ferric oxide. After the sedimentation is completed, remove...

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Abstract

The invention discloses a magnetic chitosan attapulgite algae removal flocculant. The flocculant comprises a core body and a coating, wherein the core body comprises magnetic chitosan microspheres andattapulgite with a mass ratio of 1:10, and the coating is dimethyl diallyl ammonium chloride clay. The invention also discloses a preparation method of the magnetic chitosan attapulgite algae removalflocculant. The preparation method comprises the following steps: S1) preparing magnetic chitosan microspheres; S2) preparing flocculant pills; and S3) carrying out coating. The magnetic chitosan attapulgite algae removal flocculant disclosed by the invention has a fast effect and a long maintenance time, so that rapid sedimentation and algae removal can be realized, algae can be effectively controlled for a long time, and thus the application prospect is wide. The magnetic chitosan attapulgite algae removal flocculant prepared by the preparation method has uniform particles and has a good algae removal effect.

Description

technical field [0001] The invention relates to the technical field of algae-removing flocculants, in particular to a magnetic chitosan attapulgite algae-removing flocculant and a preparation method thereof. Background technique [0002] Chitosan is currently generally recognized as a safe and effective microalgae flocculant. It is a natural polymer compound, non-toxic and biodegradable. At the same time, its chemical composition is similar to that of microalgae, which has no adverse effect on the subsequent processing and application of microalgae, does not need to be separated again, and can be used together with algae in the fields of food industry, biomedicine and biodiesel. [0003] Magnetic fluid, also known as magnetic liquid, is generally composed of magnetic nanoparticles coated or modified by adding surfactants, which are highly uniformly dispersed in the carrier liquid to form a stable and functional colloidal solution. [0004] As a cheap and easy-to-obtain mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/5263
Inventor 左剑恶潘志成王凯军
Owner TSINGHUA UNIV
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