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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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  • Abstract
  • Description
  • Claims
  • Application Information

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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; sol-gel method has complicated synthesis process, poor sinterability, and narrow application range; Long; microemulsion method, the synthetic magnetic material is a core-shell mixed type

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

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Embodiment 1

[0042] Step 1. Add two parts of sodium alginate into distilled water respectively, stir fully, and prepare two parts of sodium alginate solutions with a concentration of 2wt%, one part is the shell solution; Dichloromethane and nano ferric oxide were added into the sodium aqueous solution, fully stirred and mixed uniformly to obtain a nuclear layer solution, the concentration of dichloromethane in the nuclear layer solution was 6wt%, and the nanometer ferric oxide in the nuclear layer solution The concentration is 1wt%;

[0043] Step 2: Using high-voltage electrospinning equipment, input the shell solution and the core solution into the outer layer and the inner layer of the stainless steel coaxial needle respectively. The size of the stainless steel coaxial needle is No. 4 inner needle and No. 8 outer needle , set the high-voltage electrostatic spraying conditions as follows: the ambient temperature is 30°C, the output voltage of the high-voltage power supply is 5kv, the dist...

Embodiment 2

[0046] Step 1. Add two parts of sodium alginate into distilled water respectively, stir fully, and prepare sodium alginate solutions with a concentration of 1wt% and 2wt%, and the 1wt% sodium alginate solution is the shell solution; Add dichloromethane and nano-ferric oxide to the sodium alginate aqueous solution, stir and mix evenly to obtain a nuclear layer solution, the concentration of dichloromethane in the nuclear layer solution is 2wt%, and the nano-ferric oxide in the nuclear layer solution The concentration of three irons is 0.5wt%;

[0047] Step 2. Using high-voltage electrospinning equipment, input the shell solution and the core solution into the outer layer and the inner layer of the stainless steel coaxial needle respectively. The size of the stainless steel coaxial needle is No. 6 inner needle and No. 12 outer needle , set the high-voltage electrostatic spraying conditions as follows: the ambient temperature is 35°C, the output voltage of the high-voltage power ...

Embodiment 3

[0050] Step 1. Add two parts of sodium alginate into distilled water respectively, stir fully, and prepare sodium alginate solutions with a concentration of 3wt% and 4wt%, and the 3wt% sodium alginate solution is the shell solution; Add dichloromethane and nano-ferric oxide to the sodium alginate aqueous solution, fully stir and mix uniformly to obtain a nuclear layer solution, the concentration of dichloromethane in the nuclear layer solution is 4wt%, and the nano-ferric oxide in the nuclear layer solution The concentration of three irons is 0.7wt%;

[0051] Step 2. Using high-voltage electrospinning equipment, input the shell solution and the core solution into the outer layer and the inner layer of the stainless steel coaxial needle respectively. The size of the stainless steel coaxial needle is No. 5 inner needle and No. 10 outer needle , the high-voltage electrostatic spraying conditions were set as follows: the ambient temperature was 40°C, the output voltage of the high...

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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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