Preparation method of magnetic core-shell alginate microsphere adsorbent

An alginate and microsphere adsorption technology, which is applied in the field of biomass resource utilization and biomass adsorption materials, can solve the problems of complex synthesis process, high temperature requirements, narrow application range, etc., and achieve simple operation, high adsorption efficiency, small size The effect of controllability

Active Publication Date: 2015-06-17
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, the methods for synthesizing magnetic core-shell materials mainly include: co-precipitation method, which is simple to synthesize, but has poor morphology and low purity

Method used

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  • Preparation method of magnetic core-shell alginate microsphere adsorbent
  • Preparation method of magnetic core-shell alginate microsphere adsorbent
  • Preparation method of magnetic core-shell alginate microsphere adsorbent

Examples

Experimental program
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Example Embodiment

[0041] Example 1:

[0042] Step 1. Add two parts of sodium alginate to distilled water separately, stir well to prepare two parts of sodium alginate solution with a concentration of 2wt%, one is a shell solution; to another part of alginic acid with a concentration of 2wt% Add dichloromethane and nano ferroferric oxide to the sodium aqueous solution, stir and mix well to obtain a nuclear layer solution. The concentration of dichloromethane in the nuclear layer solution is 6wt%. The nano ferroferric oxide in the nuclear layer solution The concentration is 1wt%;

[0043] Step 2. Using high-voltage electrostatic spinning equipment, the shell solution and the core solution are respectively input into the outer layer and the inner layer of the stainless steel coaxial needle. The size of the stainless steel coaxial needle is the inner needle No. 4 and the outer needle No. 8 , Set the high-voltage electrostatic spray conditions as follows: the ambient temperature is 30℃, the output volta...

Example Embodiment

[0045] Example 2:

[0046] Step 1. Add two parts of sodium alginate to distilled water separately, stir well to prepare sodium alginate solutions with a concentration of 1wt% and 2wt%, 1wt% sodium alginate solution is the shell solution; to the concentration of 2wt% Add dichloromethane and nano ferroferric oxide to the sodium alginate aqueous solution, stir and mix well to obtain a nuclear layer solution. The concentration of methylene chloride in the nuclear layer solution is 2wt%. The concentration of iron three is 0.5wt%;

[0047] Step 2. Using high-voltage electrostatic spinning equipment, the shell solution and core solution are respectively input into the outer layer and the inner layer of the stainless steel coaxial needle. The size of the stainless steel coaxial needle is inner needle No. 6 and outer needle No. 12 , Set the high-voltage electrostatic spray conditions as follows: the ambient temperature is 35℃, the output voltage of the high-voltage power supply is 10kv, th...

Example Embodiment

[0049] Example 3:

[0050] Step 1. Add two parts of sodium alginate to distilled water separately, stir well to prepare 3wt% and 4wt% sodium alginate solutions, 3wt% sodium alginate solution is the shell solution; to the 4wt% concentration Add dichloromethane and nano ferroferric oxide to the sodium alginate aqueous solution, stir and mix well to obtain a core layer solution. The concentration of dichloromethane in the core layer solution is 4wt%. The concentration of iron three is 0.7wt%;

[0051] Step 2. Using high-voltage electrostatic spinning equipment, the shell solution and core solution are respectively input into the outer layer and the inner layer of the stainless steel coaxial needle. The size of the stainless steel coaxial needle is the inner needle No. 5 and the outer needle No. 10 , Set the high-voltage electrostatic spray conditions as follows: the ambient temperature is 40℃, the output voltage of the high-voltage power supply is 8kv, the distance between the receiv...

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Abstract

The invention discloses a preparation method of a magnetic core-shell alginate microsphere adsorbent. The preparation method comprises the following steps: preparing two parts of sodium alginate solution, wherein one part is shell layer solution, and dichloromethane and nanometer ferroferric oxide are added into the other part and uniformly mixed to obtain nuclear layer solution; and respectively injecting the shell layer solution and the nuclear layer solution into the outer layer and the inner layer of a stainless steel coaxial needle head, jetting the shell layer solution and the nuclear layer solution into a receiving device filled with calcium chloride solution under high-pressure electrostatic jetting conditions by utilizing high-pressure electrostatic spinning equipment, stirring, filtering, then, immersing the microsphere in metal salt solution, stirring, filtering, and drying to prepare the magnetic core-shell alginate microsphere adsorbent. The magnetic core-shell alginate microsphere adsorbent has the adsorptive property of an alginate gel microsphere adsorbent to a part of anion and also has magnetic property; therefore, an adsorbing material is more convenient and rapid to recycle; the use recovery cost is reduced; the application range is enlarged; and the preparation method can be widely applied to anion adsorption concentration, settling separation and waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of biomass resource utilization and biomass adsorption materials, and in particular relates to a preparation method of a magnetic core-shell alginate microsphere adsorbent. Background technique [0002] Fluorine, phosphorus and other pollution in water have caused serious harm to human health and ecological environment. Therefore, it is of practical significance to develop and improve various technologies to treat fluoride ions in wastewater. Compared with ion exchange, chemical precipitation, Donnan dialysis and other methods, the use of adsorption to remove anions such as fluorine and phosphate in wastewater has the advantages of low cost, large adsorption capacity, and easy regeneration of adsorption, but it is difficult to separate and recover the adsorbent. . In order to solve the disadvantage of difficult separation of the adsorbent, the adsorbent is endowed with magnetism, which can be quickly separ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/02C02F1/28C02F1/58
Inventor 林晓艳张亚慧周秋生张亚萍罗学刚
Owner SOUTHWEAT UNIV OF SCI & TECH
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