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Preparation method of calixarene modified magnetic porous protein gel adsorbent

A technology of porin and calixarene, applied in the field of environment and chemistry, can solve problems such as environmental pollution, unfavorable operation, loss of calixarene, etc., and achieve the effect of good desorption performance, easy control of conditions, and good adsorption selection

Inactive Publication Date: 2019-07-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calixarene is directly used in solvent extraction for the loss of calixarene, and at the same time toxic organic solvents are used, which causes environmental pollution and is not conducive to operation. In this application, calixarene is linked to the biological skeleton as an active group to overcome the above shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of magnetic porous protein gel microspheres: In the reactor, add deionized water: 72mL, water-soluble collagen powder: 16g, stir to dissolve, add the mixture of nano-ferric oxide and xanthan gum: 6g, succinic aldehyde: 7 mL, at a constant temperature of 45±2°C, stirring at a speed of 2500 rpm, reacting for 2h, cooling to room temperature, spraying the obtained viscous liquid on magnesium chloride containing 5% by mass In a mixed solution with 1% sodium chloride, the particle size of the composite microspheres is controlled by the diameter of the nozzle, washed, solid-liquid separation, and freeze-dried to obtain magnetic porous protein gel microspheres;

[0024] (2) Pretreatment of magnetic porous protein gel microspheres: In the reactor, add deionized water: 74 mL, ethylenediamine: 8 mL, ammonia water: 8 mL, stir to dissolve, magnetic porous protein gel microspheres: 12g, keep the temperature at 45±2°C, stir, and reflux for 3 hours, after cooling, wash ...

Embodiment 2

[0027] (1) Preparation of magnetic porous protein gel microspheres: In the reactor, add deionized water: 70mL, water-soluble collagen powder: 18g, stir to dissolve, add the mixture of nano ferric oxide and xanthan gum: 4g, succinic aldehyde: 9 mL, at a constant temperature of 45±2°C, stirring at a speed of 2500 rpm, reacting for 2 hours, cooling to room temperature, spraying the obtained viscous liquid on magnesium chloride containing 5% by mass In a mixed solution with 1% sodium chloride, the particle size of the composite microspheres is controlled by the diameter of the nozzle, washed, solid-liquid separation, and freeze-dried to obtain magnetic porous protein gel microspheres;

[0028] (2) Pretreatment of magnetic porous protein gel microspheres: In the reactor, add deionized water: 72mL, ethylenediamine: 9mL, ammonia water: 7 mL, stir to dissolve, magnetic porous protein gel microspheres: 14g , keep the temperature at 45±2°C, stir, and reflux for 2 hours. After cooling, w...

Embodiment 3

[0031] (1) Preparation of magnetic porous protein gel microspheres: In the reactor, add deionized water: 74mL, water-soluble collagen powder: 14g, stir to dissolve, add nano-ferric oxide and xanthan gum mixture: 8g, succinic aldehyde: 7 mL, at a constant temperature of 45±2°C, stirring at a speed of 2500 rpm, reacting for 2h, cooling to room temperature, spraying the obtained viscous liquid on magnesium chloride containing 5% by mass In a mixed solution with 1% sodium chloride, the particle size of the composite microspheres is controlled by the diameter of the nozzle, washed, solid-liquid separation, and freeze-dried to obtain magnetic porous protein gel microspheres;

[0032](2) Pretreatment of magnetic porous protein gel microspheres: In the reactor, add deionized water: 76 mL, ethylenediamine: 7 mL, ammonia water: 8 mL, stir to dissolve, magnetic porous protein gel microspheres: 13g, keep the temperature at 45±2°C, stir, and reflux for 4 hours, after cooling, wash with dei...

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Abstract

The invention discloses a preparation method of a calixarene modified magnetic porous protein gel adsorbent. The preparation method is characterized in that a nano ferroferric oxide and xanthan gum mixture is added to collagen powder for magnetization, and magnetic porous protein gel microspheres are prepared with succinaldehyde as a crosslinking agent; the magnetic porous protein gel microspheresare pretreated with ethylenediamine and ammonium hydroxide, and pretreated magnetic porous protein gel microspheres are prepared; then, 72%-76% of trichloromethane, 10%-14% of thionyl chloride and 6%-8% of 4-tert-butyl calix[4]arene are added to a reactor in percentage by mass, the mixture is stirred for dissolution, 6%-8% of the pretreated magnetic porous protein gel microspheres are added, themixture reacts for 4 h, solid-liquid separation and drying are performed, and the calixarene modified magnetic porous protein gel adsorbent is obtained. The adsorbent has very high adsorption capacityfor thorium ions, specificity, low cost and high mechanical strength, can be reused for 10 times or more and is easy to separate.

Description

technical field [0001] The invention relates to a preparation method of a modified magnetic biosorbent, in particular to a preparation method of a calixarene modified magnetic porous protein gel adsorbent and its application to adsorption and separation of thorium ions, belonging to the technical field of environment and chemistry. Background technique [0002] Thorium is a natural radioactive element that exists in nature. It has potential application prospects in nuclear energy. In nature, thorium reserves are larger than uranium. It can effectively supplement the shortage of uranium resources in the future and has received more and more research and attention. . However, the chemical toxicity of thorium and its compounds may become one of the main pollution elements in the environment, so the enrichment and post-treatment of thorium are increasingly important. At present, the separation and enrichment methods of thorium mainly include liquid-liquid extraction, liquid mem...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/28047C02F1/286C02F2101/006
Inventor 李慧芝翟殿棠戚玉华
Owner UNIV OF JINAN
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