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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

Inactive Publication Date: 2015-09-23
新乡市辉隆生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The carboxyl group contained in it has the ability to chelate metal ions. It has been reported in the literature that it can be used to adsorb heavy metal ions in the solution, and has a certain effect. The disadvantage is that the adsorption capacity is small

Method used

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  • 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
  • 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

Examples

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Embodiment 1

[0022] A kind of preparation method of porous sodium alginate polyglutamic acid gel ball, it comprises the steps:

[0023] 1) Preparation of sodium alginate water-soluble: Weigh 4g of sodium alginate (SA) and add it to 200ml of deionized water, place it on a magnetic stirrer and stir at 1000rpm until the solution is uniform (about 6 hours);

[0024] 2) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, and add 2mL of glutaraldehyde with a content of 50% to the obtained calcium chloride solution;

[0025] 3) Add the sodium alginate solution obtained in step 1) into the fixed solution obtained in step 2) drop by drop, preferably at 5 drops / second, and let it stand overnight (12h) after the addition; filter, and use a large amount of gel particles to remove Ion rinsing to remove surface Ca 2+ with Na + , and then vacuum-dried to obtain sodium alginate gel particles. The obtained sodium alginate gel particles were detec...

Embodiment 2

[0034] A kind of preparation method of porous sodium alginate polyglutamic acid gel ball, it comprises the steps:

[0035] 1) Preparation of sodium alginate water-soluble: Add 4g of sodium alginate (SA) into 200g of deionized water, place it on a magnetic stirrer and stir at 1000rpm until the solution is uniform (about 6 hours);

[0036] 2) Preparation of sodium alginate-polyglutamic acid water soluble: add 2g of polyglutamic acid (PGA) to the solution prepared in step 1), and keep stirring until the solution is uniform;

[0037] 3) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, add 2mL of glutaraldehyde with a content of 50% to the obtained calcium chloride solution;

[0038] 4) Add the sodium alginate-polyglutamic acid solution obtained in step 2) dropwise into the fixative solution obtained in step 3), preferably at 5 drops / second, and let stand overnight (12h) after the addition; filter, Gel particles are rins...

Embodiment 3

[0041] A kind of preparation method of porous sodium alginate polyglutamic acid gel ball, it comprises the steps:

[0042] 1) Preparation of sodium alginate water-soluble: Add 4g of sodium alginate into 200ml of deionized water, place on a magnetic stirrer and stir at 1000rpm to dissolve until the solution is uniform (about 6 hours of stirring is required);

[0043] 2) Preparation of sodium alginate-polyglutamic acid water soluble: add 2g of polyglutamic acid to the solution prepared in step 1), and keep stirring until the solution is uniform;

[0044] 3) Preparation of fixative solution: Weigh 50g of calcium chloride and dissolve it in 1000mL of deionized water, add 2mL of glutaraldehyde with a content of 50% 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 evenly, and drop the obtained solution into the fixative solution obtained in step 3), prefer...

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Abstract

The invention relates to a method for preparing porous sodium alginate-polyglutamic acid gel beads. The method specifically includes the following steps: (1) adding 2-6 g of sodium alginate to 200 ml of deionized water, and stirring until sodium alginate is dissolved and the solution is in a homogeneous state; (2) adding 1-3 g of polyglutamic acid to the solution obtained in the step (1), and continuously stirring until the solution is in a homogeneous state; (3) preparing a fixative: weighing and dissolving 40-60 g of calcium chloride in 1000 mL of deionized water, and adding 1-3 mL of 50% glutaraldehyde to the obtained calcium chloride solution; (4) adding 4-6 mL of methylbenzene to the solution obtained in the step (2), stirring uniformly, then dropwise adding the obtained solution to the fixative obtained in the step (3), standing overnight, then adding absolute ethyl alcohol, stirring, soaking, filtering, washing the particles and then vacuum drying to obtain the porous sodium alginate polyglutamic acid gel beads. According to the method provided by the invention, polyglutamic acid is wrapped by sodium alginate, and tiny droplets are formed inside the gel in virtue of the water insolubility of methylbenzene; the prepared product is excellent in effect of adsorbing the heavy metal Pb.

Description

technical field [0001] The invention belongs to the technical field of biological and environmental engineering materials, and in particular relates to a porous sodium alginate polyglutamic acid gel ball, a preparation method thereof and an application as a heavy metal adsorbent. Background technique [0002] In recent years, with the development of machinery manufacturing, chemical industry, electronics, instrumentation, mining and metallurgy and other industries, wastewater containing heavy metals has been discharged into surface water in large quantities. Plants that accumulate excessive heavy metals and polluted drinking water make heavy metals exist in excess in the human body, bringing a series of terrible diseases to people. Therefore, it is necessary and necessary to treat heavy metal wastewater. The commonly used methods at this stage are: chemical precipitation, electrolysis, dissolution extraction, ion exchange, membrane separation, adsorption and biological (mat...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 许平辉吴坤屈城乡王志伟臧淑峰宋小峰
Owner 新乡市辉隆生物科技有限公司
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