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Sodium alginate microspheres capable of efficiently and selectively adsorbing heavy metals and preparation method of sodium alginate microspheres

A technology for adsorbing heavy metals and sodium alginate, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of sodium alginate microsphere hydrogel size control, difficulty in size control, and small particle strength, etc., and achieve good Industrial application prospect, strong acid resistance and long service life

Inactive Publication Date: 2021-01-22
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the prior art, the present invention aims to solve the problems of the existing sodium alginate microsphere hydrogel, such as difficult size control, small particle strength, poor acid resistance and low adsorption capacity.
The invention provides a high-efficiency selective adsorption of heavy metal sodium alginate microspheres and a preparation method thereof; the invention improves the problem of difficult size control of a single sodium alginate due to high viscosity by introducing a water-soluble polymer material. Combined with cross-linking agent modification to effectively solve the problems of small particle strength, poor acid resistance and low adsorption capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) First, 65 parts of sodium alginate are formulated into an aqueous solution of 10% sodium alginate with a mass concentration of 10%, and 32 parts of water-based polyurethane are formulated with a mass concentration of 8.6% aqueous polyurethane solution, and then the aqueous solution of sodium alginate and aqueous polyurethane solution The aqueous solution was mixed in a mixing container, and stirred at a stirring rate of 100 rpm for 60 minutes to prepare a uniformly dispersed sodium alginate mixed solution A;

[0028] (2) Then, the sodium alginate mixed solution A prepared in step (1) is continuously added dropwise to 200 parts of a 1.5% calcium chloride aqueous solution with a mass concentration through a pinhole, and then stirred at a stirring rate of 50 rpm for 60 min to obtain seaweed Sodium acid / water-soluble polymer composite microspheres;

[0029] (3) Slowly add the sodium alginate / water-soluble polymer composite microspheres prepared in step (2) to the aqueou...

Embodiment 2

[0033] (1) First, 65 parts of sodium alginate are formulated into an aqueous solution of 10% sodium alginate with a mass concentration of 10%, and 30 parts of water-based polyurethane are formulated with a mass concentration of 8.6% aqueous polyurethane solution, and then the aqueous solution of sodium alginate and aqueous polyurethane solution The aqueous solution was mixed in a mixing container, and stirred at a stirring rate of 100 rpm for 60 minutes to prepare a uniformly dispersed sodium alginate mixed solution A;

[0034] (2) Then, the sodium alginate mixed solution A prepared in step (1) is continuously added dropwise to 200 parts of a 1.5% calcium chloride aqueous solution with a mass concentration through a pinhole, and then stirred at a stirring rate of 50 rpm for 60 min to obtain seaweed Sodium acid / water-soluble polymer composite microspheres;

[0035](3) Slowly add the sodium alginate / water-soluble polymer composite microspheres prepared in step (2) to the aqueous...

Embodiment 3

[0039] (1) First, 67 parts of sodium alginate are formulated into an aqueous solution of 10% sodium alginate with a mass concentration of 10%, and 28 parts of water-based polyurethane are formulated with a mass concentration of 8.6% aqueous polyurethane solution, and then the aqueous solution of sodium alginate and aqueous polyurethane solution The aqueous solution was mixed in a mixing container, and stirred at a stirring rate of 100 rpm for 30 minutes to prepare a uniformly dispersed sodium alginate mixed solution A;

[0040] (2) Then, the sodium alginate mixed solution A prepared in step (1) is continuously added dropwise to 200 parts of a 1.5% calcium chloride aqueous solution with a mass concentration through a pinhole, and then stirred at a stirring rate of 50 rpm for 60 min to obtain seaweed Sodium acid / water-soluble polymer composite microspheres;

[0041] (3) Slowly add the sodium alginate / water-soluble polymer composite microspheres prepared in step (2) to the aqueou...

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Abstract

The invention relates to sodium alginate microspheres capable of efficiently and selectively adsorbing heavy metals and a preparation method of the sodium alginate microspheres. The sodium alginate microspheres capable of efficiently and selectively adsorbing the heavy metals comprise the following components in parts by weight: 40-70 parts of sodium alginate, 20-40 parts of a water-soluble polymer material, 0.5-13 part of polyacrylamide and 1-11 parts of a cross-linking agent. With the preparation method adopted, the problems of difficult size control, small particle strength, poor acid resistance, low adsorption capacity and the like in traditional preparation of sodium alginate microsphere hydrogel are solved. According to the preparation method, the problem that the size of single sodium alginate is difficult to control due to high viscosity is solved by introducing a water-soluble polymer material, and the problems of small particle strength, poor acid resistance, low adsorption capacity and the like are effectively solved by combining polyacrylamide with a cross-linking agent for modification. The sodium alginate microspheres capable of efficiently and selectively adsorbing the heavy metals are prepared by adopting the preparation method of the invention, the technological process is simple, and control is convenient. The sodium alginate microsphere capable of efficientlyand selectively adsorbing the heavy metals is widely applied to the aspect of heavy metal treatment.

Description

technical field [0001] The invention relates to a high-efficiency selective adsorption of heavy metal sodium alginate microspheres and a preparation method thereof, which are applied to heavy metals. Background technique [0002] At present, the adsorbent using sodium alginate as raw material is a research hotspot of biomass adsorption materials, and the common sodium alginate is used as raw material to prepare hydrogel. However, hydrogel-like adsorbents are generally prepared by dropping sodium alginate solution into calcium chloride solution. The diameter is generally more than 1 mm, and the specific surface area is small due to the large size, and the adsorption capacity is relatively small. lower. [0003] The prior art patent CN109351350A describes a method for preparing sodium alginate microsphere adsorbent by emulsion polymerization, which belongs to the technical field of metal ion adsorption. In the method, chemically modified sodium alginate solution is fully mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/24B01J20/261B01J20/046
Inventor 王仁宗汪志操素芬
Owner HUBEI FORBON TECH