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Method for preparing ammonifiers adosorbant

A technology of mycelium and adsorbent, which is applied in the field of preparation of ammoniated mycelium adsorbent, can solve the problems of insignificant increase in adsorption capacity and limited increase in functional group density, so as to achieve no secondary pollution and easy biodegradation , high adsorption effect

Inactive Publication Date: 2007-11-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small specific surface area of ​​the mycelium, the adsorption mainly occurs on the surface of the mycelium. Therefore, the traditional chemical reaction has a limited degree of increase in the density of the functional groups on the surface of the mycelium, resulting in an insignificant increase in the amount of adsorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Add 1g of Penicillium chrysogenum mycelia to 40mL of dimethylformamide solvent, then dropwise add 4mL of epichlorohydrin, react at 100°C for 8h, filter, and use dimethylformamide for mycelium After washing, put it into 200mL dimethylformamide solution containing polyethyleneimine, the concentration of polyethyleneimine is 5g / 100mL dimethylformamide solvent, react at 100℃ for 24h, filter with methanol first, then The unreacted polyethyleneimine on the surface of the mycelium was washed with deionized water, and freeze-dried to constant weight to obtain the ammoniated mycelium adsorbent. Put 0.05g of ammoniated adsorbent into a 250mL Erlenmeyer flask, then add 100mL of sodium pentachlorophenate solution (pH=6) with a concentration of 200mg / L, and adsorb in a shaker with a rotation speed of 120rpm for 12h (to reach equilibrium). The calculated adsorption capacity of ammoniated adsorbent to adsorb sodium pentachlorophenate is 323mg / g.

Embodiment 2

[0024]Example 2: Put 0.2g of citric acid mycelium into 20mL of chloroform solvent, then add 0.1mL of chloroacetyl chloride dropwise, seal the container and react at 25°C for 24h, filter, and wash the mycelium with chloroform After washing, transfer to 10 mL polyamidoamine in chloroform solution, the concentration of polyamidoamine is 20g / 100mL chloroform solvent, and react at 80°C for 10h. After filtering, the unreacted reagent on the surface of the mycelia is repeatedly washed with methanol and then with deionized water, and freeze-dried to constant weight to obtain the ammoniated mycelia adsorbent. Put 0.05g of the prepared adsorbent into a 250mL Erlenmeyer flask, then add 100mL of sodium pentachlorophenate solution (pH=6) with a concentration of 200mg / L, and adsorb in a shaker at 120rpm for 12h (to reach equilibrium). The calculated adsorption capacity of ammoniated adsorbent to adsorb sodium pentachlorophenate is 289mg / g.

Embodiment 3

[0025] Example 3: Put 0.2g of Penicillium chrysogenum mycelia into 20mL of chloroform solvent, then add 0.1mL of chloroacetyl chloride dropwise, seal the container and react at 25°C for 24h, filter, and use the mycelium After washing with chloroform, transfer to 50 mL of polyethylene polyamine in chloroform solution, the concentration of polyethylene polyamine is 20 g / 100 mL of chloroform solvent, and react at 100° C. for 24 h. After filtering, the unreacted reagent on the surface of the mycelia is repeatedly washed with methanol and then with deionized water, and freeze-dried to constant weight to obtain the ammoniated mycelia adsorbent. Put 0.05g of the prepared adsorbent into a 250mL Erlenmeyer flask, then add 100mL of sodium pentachlorophenate solution (pH=6) with a concentration of 200mg / L, and adsorb in a shaker at 120rpm for 12h (to reach equilibrium). The calculated adsorption capacity of ammoniated adsorbent to adsorb sodium pentachlorophenate is 235 mg / g.

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Abstract

The present invention relates to a preparation method of ammoniated mycelium adsorbent, in particular, it provides a preparation method of mycelium adsorbent whose surface has positive charge. Said invention can make macromolecular polymer containing lots of amino-group be grafted on the mycelium surface by means of two-step simple chemical reaction so as to greatly raise the density of adsorbent surface amino-groups. Its preparation method includes the following steps: using mycelium as raw material, firstly, adding mycelium into an organic solvent of cross-linking agent and making reaction for 8-24h, the volume weight ratio of cross-linking agent and mycelium is 0.5-4ml / g, then adding mycelium into an organic solvent containing amino-group macromolecule, the weight volume ratio of amino-group macromolecule and organic solvent is 5-20g / 100ml, heating to 80-100deg.C and making reaction for 10-24h so as to obtain the invented ammoniated mycelium adsorbent.

Description

technical field [0001] The invention belongs to the technical field of water treatment adsorption. It particularly relates to a preparation method of an ammoniated mycelium adsorbent which can be used to adsorb and remove anion endocrine disruptors contained in waste water. Background technique [0002] Mycelium is a by-product of the brewing and pharmaceutical industries, some of which are used as animal feed, and most of them are discarded, which not only wastes resources but also pollutes the environment. In recent years, the use of mycelium as an adsorbent for heavy metals has attracted widespread attention, but due to the low density of functional groups on the surface of the original mycelium, its adsorption capacity is often not high (usually less than 20mg / g). Therefore, improving the adsorption capacity of mycelium through surface modification has become a research hotspot. [0003] Most commonly, the mycelium is treated with NaOH to increase its adsorption capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C02F1/28
Inventor 邓述波马睿余刚
Owner TSINGHUA UNIV
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