A kind of preparation method of modified Ginkgo biloba exocarp-alginate microsphere adsorbent

A technology of ginkgo biloba testa and alginate, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as pollution, waste of resources and the environment, and achieve process controllability, pollution reduction, The effect of easy operation

Active Publication Date: 2019-12-31
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the waste of ginkgo testa not only causes resource waste but also causes environmental pollution, the object of the present invention is to provide a preparation method of modified ginkgo testa-alginate microsphere adsorbent, which is easy to operate, The process is simple, the process is controllable, the conditions are mild, the repeatability is good, the cost is low, and it is easy to popularize and use. The prepared ginkgo testa adsorption material has good performance of adsorbing heavy metal ions and organic pollutants, and can also reduce pollution and clean environment, has a wide range of application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 10 g of washed and crushed ginkgo testa into 100 ml of water, adjust the pH to 8.5 with sodium carbonate, then add 1.16 g of hexamethylenediamine, stir and react for 24 h, then centrifuge, add 0.8 g of pyrogallol to the centrifuge to concentrate Reacted for 2 days, concentrated to a concentration of 5 wt% by rotary evaporation, then added 0.5 g of polyvinyl alcohol, stirred evenly, blended with a concentration of 3 wt% alginate solution, and then dripped through a syringe to a concentration of 2 In the wt% calcium chloride solution, the pellets were formed and left to harden for 6 h, then the pellets were filtered out, washed and dried to obtain the modified Ginkgo biloba exotesta-alginate microspheres adsorption material.

[0022] The modified Ginkgo biloba exotesta-alginate microsphere adsorption material obtained by the above method has an adsorption capacity of 125 mg / g for rhodamine 6G.

Embodiment 2

[0024] Add 10 g of washed and crushed Ginkgo biloba exotesta to 100 ml of sodium hydroxide solution with pH = 12, then add 2.32 g of hexamethylenediamine, stir and react for 48 h, then centrifuge, add 0.5 g of gallic acid into the centrifuge to concentrate reaction 3 day, concentrated by rotary evaporation to a concentration of 8 wt%, then added 0.8 g of polyvinyl alcohol, stirred evenly, and blended with a concentration of 2 wt% alginate solution, and then dripped through a syringe to stop the stirring concentration of 2 wt% The modified ginkgo exotesta-alginate microspheres can be prepared after the pellets are formed in the calcium chloride solution and left to stand for 12 hours to harden, then filtered out, washed and dried.

[0025] The modified Ginkgo biloba exotesta-alginate microsphere adsorption material obtained by the above method has an adsorption capacity of 215 mg / g for hexavalent chromium under the condition of pH=2.

Embodiment 3

[0027] Add 15 g of washed and crushed Ginkgo biloba exotesta to 100 ml of water, adjust the pH to 10 with sodium hydroxide, then add 2.64 g of butanediamine, stir and react for 36 h, then centrifuge, add 1.8 g of tannic acid to the centrifuge to concentrate the reaction After 2 days, it was concentrated to a concentration of 3 wt% by rotary evaporation, then 1.5 g of polyvinyl alcohol was added, stirred evenly, and blended with a 2 wt% alginate solution, and then dripped into the solution through a syringe to a concentration of 3 wt%. % calcium chloride solution, the pellets were formed and left to harden for 8 h, then the pellets were filtered out, washed and dried to prepare the modified Ginkgo biloba exotesta-alginate microspheres adsorption material.

[0028] The modified Ginkgo biloba exotesta-alginate microsphere adsorption material obtained by the above method has an adsorption capacity of 127 mg / g for Congo red.

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Abstract

The invention discloses a preparing method of a modified gingko testa-alginate microsphere adsorbent. The method comprises the steps that firstly thoroughly washed gingko testa is smashed, then the smashed gingko testa is added into an alkaline solution of diamine or polyamine, centrifugation is conducted after a reaction is conducted for a certain time, centrifugate and a phenol compound are reacted for a certain time and are then concentrated, then a certain amount of polymers is added, and the polymers and an alginate solution are mixed together, under stirring, a calcium chloride solution is injected, and the modified gingko testa-alginate microsphere adsorbent is prepared. The preparing method is simple in process, convenient to operate, controllable in technology, mild in condition, good in repeatability, low in cost and easy to apply and popularize, the prepared modified gingko testa-alginate microsphere adsorbent has good performance of adsorbing heavy metal ions and organic pollutant, further has certain innovative significance in reducing pollution and cleaning the environment, and has a wide application prospect.

Description

technical field [0001] The invention relates to the preparation of an adsorbent, in particular to a preparation method of a modified ginkgo exotesta-alginate microsphere adsorbent, which belongs to the technical field of modified natural polymer materials. Background technique [0002] Environmental pollution is one of the severe problems facing the world today, and it is also one of the thorny problems that need to be solved urgently. Among them, most of the heavy metal ions are carcinogenic, teratogenic, mutagenic and highly toxic substances, which cannot be biodegraded in the environment. Accumulated in the human body, leading to various diseases and dysfunction; printing and dyeing wastewater contains a large amount of organic pollutants, discharged into the water body will consume dissolved oxygen, destroy the water ecological balance, endanger the survival of fish and other aquatic organisms, and its pollution can be It can lead to diseases such as allergic dermatitis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/24B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/22B01J20/24B01J20/28021C02F1/28C02F1/286C02F2101/20C02F2101/30
Inventor 刘钦泽胡涛高嵩姚金水
Owner QILU UNIV OF TECH
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