Porous sodium alginate-polyglutamic acid gel beads, preparation method thereof, and application of porous sodium alginate-polyglutamic acid gel beads as heavy metal ions absorbent
A technology of polyglutamic acid gel balls and polyglutamic acid gel, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of small adsorption capacity and achieve Improved adsorption effect, simple preparation method, mild and controllable reaction conditions
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[0021] Example 1
[0022] A preparation method of porous sodium alginate polyglutamic acid gel balls, which comprises the following steps:
[0023] 1) Preparation of sodium alginate water-soluble substance: Weigh 4g sodium alginate (SA) into 200ml deionized water, place it on a magnetic stirrer and stir at 1000rpm to dissolve until the solution is uniform (about 6 hours of stirring);
[0024] 2) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, and add 2mL of 50% glutaraldehyde to the obtained calcium chloride solution;
[0025] 3) Drop the sodium alginate solution obtained in step 1) into the fixed solution obtained in step 2) drop by drop, preferably 5 drops / sec. After the addition is complete, let it stand overnight (12h); filter and use a large amount of gel particles to remove Ion flushing to remove surface Ca 2+ With Na + , And vacuum drying to obtain sodium alginate gel particles. The obtained sodium alginate gel par...
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[0033] Example 2
[0034] A preparation method of porous sodium alginate polyglutamic acid gel balls, which comprises the following steps:
[0035] 1) Preparation of sodium alginate water soluble substance: add 4g sodium alginate (SA) to 200g deionized water, place it in a magnetic stirrer and stir at 1000rpm to dissolve until the solution is uniform (about 6 hours of stirring);
[0036] 2) Prepare sodium alginate-polyglutamic acid water soluble substance: add 2g of polyglutamic acid (PGA) to the solution prepared in step 1), and continue to stir until the solution is uniform;
[0037] 3) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, and add 2mL of 50% glutaraldehyde to the obtained calcium chloride solution;
[0038] 4) Drop the sodium alginate-polyglutamic acid solution obtained in step 2) dropwise into the fixed solution obtained in step 3), preferably 5 drops / sec. After the addition, let it stand overnight (12h); filte...
Example Embodiment
[0040] Example 3
[0041] A preparation method of porous sodium alginate polyglutamic acid gel balls, which comprises the following steps:
[0042] 1) Preparation of sodium alginate water-soluble substance: add 4g of sodium alginate to 200ml of deionized water, place it in a magnetic stirrer and stir to dissolve at 1000rpm until the solution is uniform (about 6 hours of stirring);
[0043] 2) Preparation of sodium alginate-polyglutamic acid water soluble substance: 2g of polyglutamic acid was added to the solution prepared in step 1), and stirring was continued until the solution became uniform;
[0044] 3) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, and add 2mL of 50% glutaraldehyde to the obtained calcium chloride solution;
[0045] 4) Preparation of porous sodium alginate-polyglutamic acid gel: add 5 mL of toluene to the solution obtained in step 2), stir well, drop the obtained solution into the fixed solution obtai...
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