Preparation method of novel magnetic chitosan/sodium alginate composite gel balls

A technology of sodium alginate and composite gel, which is applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., and can solve the problems that adsorbents are difficult to separate from water bodies and difficult to recycle.

Inactive Publication Date: 2018-09-11
QIDONG XIANGRUI CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, the magnetic Fe 3 o 4 The addition of nanoparticles to traditional adsorption materials can make traditional adsorbents magnetic, which solves the shortcomings of traditional adsorbents that are difficult to separate from water and difficult to recycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of preparation method of novel magnetic chitosan / sodium alginate composite gel ball comprises the steps of: adding 25 parts of FeCl with a concentration of 0.9mol / L to a beaker 3 solution and 30 parts of FeCl with a concentration of 0.4mol / L 2 Solution, add ammonia water with a mass fraction of 20% while stirring, until a large amount of black precipitates are precipitated, after magnetic separation, discard the supernatant, then wash the black precipitates with ultrapure water, repeat several times to reach the pH of the supernatant Close to neutral, collect all black precipitates, resuspend in 75 parts of ultrapure water, get Fe 3 o 4 Nano magnetic fluid; 30 parts of CaCl 2 Dissolve in 65 parts of ultrapure water; dissolve 25 parts of sodium alginate in 70 parts of ultrapure water, add 20 parts of chitosan powder and the above Fe 3 o 4 Nano-magnetic fluid, after stirring and mixing, ultrasonic treatment for 12 minutes, using a syringe needle, slowly and uni...

Embodiment 2

[0016] A preparation method of a novel magnetic chitosan / sodium alginate composite gel ball, comprising the steps of: adding 20 parts of FeCl with a concentration of 0.9mol / L to a beaker 3 solution and 25 parts of FeCl with a concentration of 0.4mol / L 2 Solution, add ammonia water with a mass fraction of 20% while stirring, until a large amount of black precipitates are precipitated, after magnetic separation, discard the supernatant, then wash the black precipitates with ultrapure water, repeat several times to reach the pH of the supernatant Close to neutral, collect all the black precipitate, resuspend in 70 parts of ultrapure water, get Fe 3 o 4 Nano magnetic fluid; 25 parts of CaCl 2 Dissolve in 60 parts of ultrapure water; dissolve 20 parts of sodium alginate in 65 parts of ultrapure water, add 15 parts of chitosan powder and the above Fe 3 o 4 Nano-magnetic fluid, after stirring and mixing, ultrasonic treatment for 10 minutes, using a syringe needle, slowly and unif...

Embodiment 3

[0018] A preparation method of a novel magnetic chitosan / sodium alginate composite gel ball, comprising the steps of: adding 30 parts of FeCl with a concentration of 0.9mol / L to a beaker 3 solution and 35 parts of FeCl with a concentration of 0.4mol / L 2 Solution, add ammonia water with a mass fraction of 20% while stirring, until a large amount of black precipitates are precipitated, after magnetic separation, discard the supernatant, then wash the black precipitates with ultrapure water, repeat several times to reach the pH of the supernatant Close to neutral, collect all the black precipitate, resuspend in 80 parts of ultrapure water, get Fe 3 o 4 Nano magnetic fluid; 35 parts of CaCl 2 Dissolve in 70 parts of ultrapure water; dissolve 30 parts of sodium alginate in 75 parts of ultrapure water, add 25 parts of chitosan powder and the above Fe 3 o 4 Nano-magnetic fluid, after stirring and mixing, ultrasonic treatment for 15 minutes, using a syringe needle, slowly and unif...

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Abstract

The invention discloses a preparation method of novel magnetic chitosan / sodium alginate composite gel balls. The preparation method comprises the following steps: adding an FeCl3 solution and an FeCl2solution into a beaker; stirring and adding ammonia water until a lot of black sediment is separated out; after carrying out magnetic separation, removing supernatant; then washing the black sedimentwith ultrapure water; repeating the steps for a plurality of times until the pH (Potential of Hydrogen) of the supernatant is nearly neutral; collecting all the black sediment and re-suspending on the ultrapure water to obtain Fe3O4 nano magnetic fluid; then dissolving CaCl2 into the ultrapure water; dissolving sodium alginate into the ultrapure water; adding chitosan powder and the Fe3O4 nano magnetic fluid; stirring and carrying out ultrasonic treatment for 10 to 15min; slowly dropwise adding a mixed solution into a CaCl2 solution at a slow speed by utilizing a needle tube of an injection syringe and immersing and ageing for 3 to 5h; washing to obtain the novel magnetic chitosan / sodium alginate composite gel balls. The preparation method has a simple preparation process and the preparedcomposite gel balls have paramagnetism and good adsorption performance and thermal stability.

Description

technical field [0001] The invention relates to a preparation method of a novel magnetic chitosan / sodium alginate composite gel ball. Background technique [0002] The development of industries such as electroplating industry, petroleum refining and metal smelting has led to the discharge of heavy metal wastewater into water bodies, causing serious damage to aquatic organisms and even endangering human health. Traditional treatment techniques include chemical precipitation, phytoremediation, and membrane treatment. The adsorption method has the advantages of simple and convenient operation, short process cycle, and good treatment effect, and has great potential for industrial application. The core of the adsorption method lies in the selection of adsorbents. High-quality adsorbents can reduce the initial investment and operating costs of the treatment process and improve the treatment effect. There are various types of adsorbents with different performances. Traditional ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
CPCB01J20/24B01J20/28009B01J20/28019B01J20/28047
Inventor 不公告发明人
Owner QIDONG XIANGRUI CONSTR CO LTD
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