Method for preparing magnetic metal adsorption materials from spherical bacterial celluloses

A technology for bacterial cellulose and adsorption materials, which is applied in microorganism-based methods, biochemical equipment and methods, alkali metal compounds, etc., can solve the problems of high cost and poor performance of metal adsorption materials, and achieve the effect of low price

Inactive Publication Date: 2017-07-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is th...

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  • Method for preparing magnetic metal adsorption materials from spherical bacterial celluloses
  • Method for preparing magnetic metal adsorption materials from spherical bacterial celluloses
  • Method for preparing magnetic metal adsorption materials from spherical bacterial celluloses

Examples

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Embodiment 1

[0031] A method for preparing magnetic metal adsorption material with bacterial cellulose balls, the specific steps are:

[0032] (1) Under sterile conditions, inoculate Acetobacter xylinum in 30 mL of liquid medium (composition: fructose 50 g / L, peptone 5 g / L, yeast extract 5 g / L, sodium monohydrogen phosphate 2.6 g / L, without Water citric acid 1.15g / L, the rest is water), in 32 ℃ incubator static culture 48h, obtain seed liquid. Add 25mL of seed liquid and 100mL of liquid medium into a 250mL Erlenmeyer flask, and incubate for 120h in a shaker with a rotation speed of 150rpm and a temperature of 32°C to obtain bacterial cellulose balls. Immerse the prepared bacterial cellulose balls in 0.1mol / L sodium hydroxide solution, wash at 80°C for 2 hours, remove residual bacteria and culture medium, and then wash with deionized water until the pH value is neutral;

[0033] (2) After immersing 100g bacterial cellulose balls into 50mL of a solution containing 2.36mg TEMPO and 23.6mg Na...

Embodiment 2

[0037] A method for preparing magnetic metal adsorption material with bacterial cellulose balls, the specific steps are:

[0038] (1) Under sterile conditions, inoculate Acetobacter xylinum in 30 mL of liquid medium (composition: fructose 50 g / L, peptone 5 g / L, yeast extract 5 g / L, sodium monohydrogen phosphate 2.6 g / L, without Water citric acid 1.15g / L, the rest is water), in 32 ℃ incubator static culture 48h, obtain seed liquid. Add 25mL of seed solution and 50mL of liquid medium into a 150mL Erlenmeyer flask, and incubate for 120h in a shaker with a rotation speed of 200rpm and a temperature of 32°C to obtain bacterial cellulose balls. Immerse the prepared bacterial cellulose balls in a sodium hydroxide solution with a concentration of 0.1mol / L, wash at 80°C for 2 hours, remove residual bacteria and culture medium, and then wash with deionized water until the pH value is neutral;

[0039](2) After immersing 100g bacterial cellulose balls into 50mL of a solution containing ...

Embodiment 3

[0043] A method for preparing magnetic metal adsorption material with bacterial cellulose balls, the specific steps are:

[0044] (1) Under sterile conditions, inoculate Acetobacter xylinum in 30 mL of liquid medium (composition: fructose 50 g / L, peptone 5 g / L, yeast extract 5 g / L, sodium monohydrogen phosphate 2.6 g / L, without Water citric acid 1.15g / L, the rest is water), in 32 ℃ incubator static culture 48h, obtain seed liquid. Add 25mL of seed liquid and 100mL of liquid medium into a 250mL Erlenmeyer flask, and incubate for 120h in a shaker with a rotation speed of 150rpm and a temperature of 32°C to obtain bacterial cellulose balls. Immerse the prepared bacterial cellulose balls in a sodium hydroxide solution with a concentration of 0.1mol / L, wash at 80°C for 2 hours, remove residual bacteria and culture medium, and then wash with deionized water until the pH value is neutral;

[0045] (2) After immersing 100g bacterial cellulose balls into 50mL of a solution containing ...

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Abstract

The invention discloses a method for preparing magnetic metal adsorption materials from spherical bacterial celluloses. The method is characterized by including fermenting the spherical bacterial celluloses; selectively oxidizing the spherical bacterial celluloses by the aid of TEMPO (2, 2, 6, 6-tetramethyl-1-piperidinyloxy) oxidizing systems to obtain oxidized spherical bacterial celluloses; immersing the oxidized spherical bacterial celluloses in mixed solution with Fe2+ and Fe3+ and allowing the oxidized spherical bacterial celluloses to sufficiently absorb iron ions; washing the oxidized spherical bacterial celluloses with the adsorbed iron ions by the aid of deionized water and immersing the oxidized spherical bacterial celluloses in sodium hydroxide solution to obtain wet-state magnetic oxidized spherical bacterial celluloses. The method has the advantages oxidation modification is carried out on bacterial celluloses to improve the metal adsorption performance, then the metal adsorption materials can be prepared by the aid of processes for synthesizing magnetic nano-particles on the surfaces of nano-celluloses, and the reusable magnetic spherical bacterial celluloses with high metal adsorption performance can be prepared under the condition of low cost.

Description

technical field [0001] The invention relates to a method for preparing a magnetic metal adsorption material, in particular to a method for preparing a magnetic metal adsorption material with bacterial cellulose balls. Background technique [0002] Bacterial cellulose is a flexible natural polymer material produced by fermentation of microorganisms under certain conditions. Its cellulose content is as high as 99%, with high porosity, large specific surface area, high water holding capacity, and a three-dimensional nano-network structure. The field has broad application prospects. There are two ways of bacterial cellulose fermentation: dynamic culture and static culture. Under static culture conditions, bacterial cellulose forms a gel-like film on the surface of the liquid medium; under dynamic culture conditions, bacterial cellulose is dispersed in the liquid medium in the form of star-shaped, spherical and other gel particles. Dynamically cultured bacterial cellulose gel p...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C12P19/04C12R1/02
CPCB01J20/24B01J20/0229B01J20/28009C12P19/04
Inventor 孟超然崔启璐丁金花黄晶郁崇文
Owner DONGHUA UNIV
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