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Preparation method of composite magnetic algae removing agent

A composite magnetic and algaecide technology, applied in chemical instruments and methods, water treatment parameter control, magnetic field/electric field water/sewage treatment, etc., can solve the problem of magnetic powder floc detachment, easy deposition at the bottom of the water, low algae removal rate, etc. problem, to achieve the effect of clear water

Active Publication Date: 2017-05-31
东阳市特意新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in the process of using the traditional magnetic algicide, the magnetic powder is easy to separate from the formed flocs, and because the density of the magnetic powder is too large, it is easy to deposit on the bottom of the water and is not easily absorbed by the magnet, resulting in a low algae removal rate To solve the problem, a method for preparing a composite magnetic algaecide with a hollow structure using polystyrene emulsion as a template is provided
The invention utilizes a hollow structure to reduce the density of the algaecide. During use, the algae in the water body can be flocculated and floated on the surface of the water body without being affected by the depth of the water body. The algae can be removed by magnet adsorption, and the combination is firm. The problem of low algae removal rate of magnetic algaecide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017]First, in a three-necked flask with a stirrer, sequentially add 5g of nano-iron ferric oxide, 80mL mass fraction of 0.8% citric acid solution, then feed nitrogen gas into the three-necked flask at a rate of 5mL / min, under nitrogen protection state, with Stir at a speed of 300r / min for 12 hours, then transfer the material in the three-neck flask to a dialysis bag, and place the dialysis bag in deionized water for dialysis for 5 days, collect the material in the dialysis bag, and place it in an oven at a temperature of 110°C Dry to constant weight to obtain modified nanometer ferric oxide, which is set aside; successively weigh 150g chitosan and 300g glycidyltrimethylammonium chloride, pour them into a three-necked flask with a stirrer, and rotate at 800r / min Stir and mix for 45 minutes. Under stirring, add 8 mL of sodium hydroxide solution with a mass fraction of 20% to the three-necked flask through the dropping funnel, and control the dripping within 5 minutes. After the...

example 2

[0020] First, in a three-necked flask with a stirrer, successively add 3g of nano-iron ferric oxide, 60mL mass fraction of 0.6% citric acid solution, then feed nitrogen gas into the three-necked flask at a rate of 3mL / min, under nitrogen protection, with Stir at 200r / min for 8 hours, then transfer the material in the three-necked flask to a dialysis bag, and place the dialysis bag in deionized water for dialysis for 3 days, collect the material in the dialysis bag, and place it in an oven at a temperature of 105°C Dry to constant weight to obtain modified nano-ferric oxide, which is set aside; successively weigh 100g chitosan and 260g glycidyltrimethylammonium chloride, pour them into a three-necked flask with a stirrer, and rotate at 600r / min Stir and mix for 30 minutes. Under stirring, add 5 mL of sodium hydroxide solution with a mass fraction of 20% to the three-necked flask dropwise through the dropping funnel, and control the dripping within 3 minutes. After the addition i...

example 3

[0023] First, in a three-necked flask with a stirrer, sequentially add 4g of nano-iron ferric oxide, 70mL mass fraction of 0.7% citric acid solution, and then feed nitrogen into the three-necked flask at a rate of 4mL / min. Stir at a speed of 250r / min for 10 hours, then transfer the materials in the three-neck flask to a dialysis bag, and place the dialysis bag in deionized water for dialysis for 4 days, collect the materials in the dialysis bag, and place them in an oven at a temperature of 107°C Dry to constant weight to obtain modified nano-ferric oxide, which is set aside; successively weigh 120g chitosan and 270g glycidyltrimethylammonium chloride, pour them into a three-necked flask with a stirrer, and rotate at 700r / min Stir and mix for 40 minutes. Under stirring, add 7 mL of sodium hydroxide solution with a mass fraction of 20% to the three-necked flask through the dropping funnel, and control the dripping within 4 minutes. After the addition is completed, move the three...

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Abstract

The invention relates to a preparation method of a composite magnetic algae removing agent, and belongs to the technical field of preparation of an algae removal agent. The method is as follows: firstly using citric acid for modifying nano Fe3O4, then using glycidyl trimethyl ammonium chloride to react with chitosan to prepare cationic chitosan, using polystyrene emulsion as a template, successively coating the template with the cationic chitosan and the citric acid modified Fe3O4 nanoparticles by electrostatic interaction, and finally removing a polystyrene inner core by dialysis in N,N-dimethyl formamide to obtain the composite magnetic algae removing agent with a hollow structure. The composite magnetic algae removing agent prepared by the method can effectively remove algae flocculation in water, the algae removal rate reaches more than 99.85%; the composite magnetic algae removing agent may not cause water pollution, after use, the water is clear and colorless, and green and environmentally-friendly requirements can be met.

Description

technical field [0001] The invention relates to a preparation method of a composite magnetic algaecide, belonging to the technical field of algaecide preparation. Background technique [0002] More than 66% of lakes and reservoirs in my country are at the level of eutrophication, of which heavy eutrophication and super eutrophication account for 22%, which leads to frequent occurrence of algal blooms. The main hazards of algae are: (1) The excessive growth of algae in the water changes the color of the water body and loses the landscape function; (2) A large number of algae cover the water surface, blocking the photosynthesis of plants in the water body, resulting in severe hypoxia in the water body At the same time, the process of algae death and decomposition consumes dissolved oxygen in water, suffocates fish, etc., and seriously damages the ecological functions of water bodies; (3) Substances such as geosmin and 2-methylisobutyritol released during the growth of algae ca...

Claims

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Application Information

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IPC IPC(8): C02F1/50C02F1/48C02F1/56
CPCC02F1/488C02F1/50C02F1/56C02F2209/08C02F2303/20
Inventor 雷笑天薛洋许丽君
Owner 东阳市特意新材料科技有限公司
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