Immobilized biological adsorption degradable material, preparation method and application thereof

A technology of degrading materials and biological adsorption, applied in chemical instruments and methods, immobilized on or in inorganic carriers, biological water/sewage treatment, etc. It can solve problems such as environmental pollution and achieve good adsorption performance and biocompatibility. Good, no secondary pollution effect

Inactive Publication Date: 2014-04-30
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, as time goes by, PAEs can migrate from the plastic to the external environment, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The immobilized bioabsorption degradation material of the present invention uses porous gold nanometer material as a carrier, polyethyleneimine as a modifier, and cutinase is immobilized. The pore diameter of the porous gold nano material is 40-50nm, and the weight average molecular weight of the polyethyleneimine is 10000.

[0028] The preparation method of porous gold nano-adsorption material, the step is,

[0029] 1. Preparation of porous gold nanomaterials

[0030] (1) the Au 42 Ag 58 The alloy was ultrasonically washed in acetone, isopropanone, and ultrapure water, and annealed at 800 °C for 10 h to remove the internal stress of the alloy due to mechanical processing, and the pretreated Au 42 Ag 58 alloy.

[0031] (2) The pretreated Au 42 Ag 58 Alloy made of 5.0 mm×5.0 mm×20 μm Au 42 Ag 58 alloy sheet.

[0032] (3) the Au 42 Ag 58 The alloy sheet was corroded freely in concentrated nitric acid at 30 ℃ for 800 min, and then annealed at 200 ℃ for 1 h to p...

Embodiment 2

[0042] The immobilized bioabsorption degradation material of the present invention uses porous gold nanometer material as a carrier, polyethyleneimine as a modifier, and cutinase is immobilized. The pore diameter of the porous gold nanomaterial is 40-50 nm, and the weight average molecular weight of the polyethyleneimine is 20000.

[0043] 1, the preparation method of porous gold nano-adsorption material, with embodiment 1.

[0044] 2. Preparation method of polyethyleneimine-modified porous gold nanomaterials

[0045] (1) Take 5 mg of NPG prepared by the above method and place it in 1.5 mL of 1 mM lipoic acid solution for 1 h to make the surface carboxylation.

[0046] (2) Put the above-mentioned surface carboxylated NPG in a mixed solution of 2 mL dimethylformamide (DMF) and 0.5 mL pyridine, react at 100 °C for 4 h, add 0.9 mL epichlorohydrin (ECH) and continue at 100 The reaction was carried out at ℃ for 4 h.

[0047] (3) The nanoporous gold material obtained after the ab...

Embodiment 3

[0053] Add 10 mg of the immobilized biosorption degradation material prepared in Example 1 into 100 mL of simulated drinking water with a DEHP concentration of 10 μg / L, perform vibration adsorption degradation at 120 rpm, take it out after 3 hours, and use an ultraviolet spectrophotometer The remaining DEHP in the solution was measured, and the results showed that the removal rate of DEHP by the immobilized biosorption degradation material was 85.8%.

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PUM

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Abstract

The invention relates to an immobilized biological adsorption degradable material, a preparation method and application thereof. With a porous gold nanometer material as a carrier and a polyethyleneimine as a modifying agent, the immobilized biological adsorption degradable material is fixed with cutinase. The preparation method of the immobilized biological adsorption degradable material comprises the following steps: placing the porous gold nanometer material in a lipoic acid solution; after the reaction is completed, adding a surface carboxylation material obtained by the reaction to pyridine and dimethylformamide, heating, adding epoxy chloropropane, after the reaction is completed, adding a surface chlorine group-containing material obtained through the reaction to a polyethyleneimine-containing organic solution, reacting, and washing to obtain a polyethyleneimine modified porous gold nanometer material, crosslinking the polyethyleneimine modified porous gold nanometer with the cutinase chemically to obtain the immobilized biological adsorption degradable material. The immobilized biological adsorption degradable material is high in adsorption efficiency and large in adsorption amount, can be repeatedly used, is simple in preparation process, is capable of effectively removing phthalic acid ester materials in a water body, and is free from secondary pollution.

Description

Technical field [0001] The invention involves a field of water purification treatment, which is specifically involved in a fixed biological adsorption and degradation material, preparation method and its application. Background technique [0002] PHThalates Esters (PAES), also known as pyrite, is a type of environmental endocrine interference. It is mainly used as a plasticizer, which is used as a modification of plasticity and strength of plastic.Add agents, in addition, can also be used for production of pesticides, coatings, printing dyeing, cosmetics and spices.Paes has been produced in large scale since the 1950s (PVC).At present, it accounts for more than 80 % of the global plasticizer market.As a plasticizer, the content of PAES in plastic products accounts for about 20-30 %, sometimes up to 50 %.PAES is not aggregated into the matrix of plastic products from co -priced keys, but is connected by hydrogen bonds or Van Dewali and polyolefin plastic molecules, retaining each ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F3/34C12N11/14
Inventor 张辰曾光明黄丹莲刘亮赖萃赵美花黄超李宁杰危臻许飘程敏
Owner HUNAN UNIV
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