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Preparation method of nanometer Fe3O4 (ferroferric oxide)/etherified bacterial cellulose composite heavy metal adsorbing material

A technology of bacterial cellulose and adsorption materials, applied in chemical instruments and methods, alkali metal compounds, adsorption of water/sewage treatment, etc., to achieve high-efficiency adsorption, simple operation, and convenient separation

Inactive Publication Date: 2017-08-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, it has not been seen that the etherified bacterial cellulose membrane was prepared by fermentation of Acetobacter xylinum (ATCC 23767) and Acetobacter xylinum (GDMCC1.423), and then loaded with nano-Fe in situ. 3 o 4 The emergence of related processes for preparing composite heavy metal adsorption materials

Method used

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  • Preparation method of nanometer Fe3O4 (ferroferric oxide)/etherified bacterial cellulose composite heavy metal adsorbing material

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Experimental program
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Effect test

Embodiment 1

[0020] 1) Under sterile conditions, inoculate Acetobacter xylinum (ATCC 23767) into 70 mL of liquid fermentation medium (10 g / L sodium carboxymethylcellulose, 30 g / L glucose, 13 g / L yeast extract, 15 g / L peptone , 2.4g / L citric acid, 3.4g / L magnesium sulfate, 3.2g / L Na 2 HPO 4 , 2.4g / L KH 2 PO 4 , pH 7, sterilized by high-temperature and high-pressure steam at 110°C for 30 minutes), cultured on a constant temperature shaker with a culture temperature of 28°C and a rotation speed of 160r / min for 18h, and then transferred to a constant temperature biochemical incubator with a culture temperature of 31°C for static culture for 7 days , removing the fermentation broth to obtain unpurified etherified bacterial cellulose membrane;

[0021] 2) Wash the unpurified etherified bacterial cellulose membrane material obtained in step 1) with deionized water, remove the residual culture medium and brown colloidal substance on the surface, and place it in 50 mL of NaOH solution with a con...

Embodiment 2

[0024] 1) Under sterile conditions, inoculate Acetobacter xylinum (GDMCC 1.423) into 70 mL of liquid fermentation medium (20 g / L sodium carboxymethylcellulose, 28 g / L glucose, 15 g / L yeast extract, 13 g / L peptone , 3g / L citric acid, 3.0g / L magnesium sulfate, 3.4g / L Na 2 HPO 4 , 2.8g / L KH 2 PO 4 , pH 6, sterilized by high-temperature and high-pressure steam at 110°C for 30 minutes), cultured on a constant temperature shaker with a culture temperature of 31°C and a rotation speed of 140r / min for 12h, and then transferred to a constant temperature biochemical incubator with a culture temperature of 29°C for static culture for 5 days , removing the fermentation broth to obtain unpurified etherified bacterial cellulose membrane;

[0025] 2) Wash the unpurified etherified bacterial cellulose membrane material obtained in step 1) with deionized water, remove the medium and brown colloidal substances remaining on the surface, and place it in 100 mL of NaOH solution with a concentra...

Embodiment 3

[0028] 1) Under sterile conditions, inoculate Acetobacter xylinum (ATCC 23767) into 70 mL of liquid fermentation medium (30 g / L sodium carboxymethylcellulose, 25 g / L glucose, 10 g / L yeast extract, 10 g / L peptone , 2.7g / L citric acid, 2.6g / L magnesium sulfate, 3.0g / L Na 2 HPO 4 , 2.6g / L KH 2 PO 4 , pH 8, sterilized by high-temperature and high-pressure steam at 110°C for 30 minutes), cultured on a constant temperature shaker with a culture temperature of 30°C and a rotation speed of 150r / min for 24 hours, and then transferred to a constant temperature biochemical incubator with a culture temperature of 28°C for static culture for 6 days , removing the fermentation broth to obtain unpurified etherified bacterial cellulose membrane;

[0029] 2) Wash the unpurified etherified bacterial cellulose membrane material obtained in step 1) with deionized water, remove the medium and brown colloidal substances remaining on the surface, and place it in 75 mL of NaOH solution with a conc...

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Abstract

The invention discloses a preparation method of a nanometer Fe3O4 (ferroferric oxide) / etherified bacterial cellulose composite heavy metal adsorbing material. The preparation method is characterized in that the characteristic of controllability of static fermenting culture of bacteria is utilized; sodium carboxymethylcellulose is added into a fermenting culture medium in situ, and is etherified and modified; after culturing is finished, the modified product, namely, etherified bacterial cellulose membrane material, is obtained; then, the template effect of bacterial cellulose is utilized, the frozen and dried etherified bacterial cellulose membrane is crushed, and the nanometer Fe3O4 / etherified bacterial cellulose composite heavy metal adsorbing material is synthesized by a co-blending precipitation method in situ. The preparation method disclosed by the invention has the advantages that the preparation method is simple, and the implementing is easy; the prepared nanometer Fe3O4 / etherified bacterial cellulose composite heavy metal adsorbing material has a good heavy metal ion adsorption effect, and easy separation, recycling effect, green and non-toxic effects, easy biodegradability, and important economic and social benefits are realized.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal adsorption material, in particular to a nano-Fe 3 o 4 The invention relates to a preparation method of etherified bacterial cellulose composite heavy metal adsorption material, which belongs to the technical field of organic polymer material preparation. Background technique [0002] With the rapid development of my country's economy, heavy metal wastewater is produced in many production processes of mining and metallurgy, machinery manufacturing, chemical industry, electronics, instrumentation and other industrial production. Excessive discharge of a large amount of industrial wastewater containing heavy metals has caused serious heavy metal pollution in water bodies, threatening and restricting human survival and development. Effectively solving the problem of heavy metal pollution to water bodies has become a research hotspot. [0003] The methods to deal with heavy metals mainly incl...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/28C02F1/28C02F101/20
CPCB01J20/06B01J20/24C02F1/281C02F1/286B01J20/28007B01J20/28009C02F2101/20B01J2220/4806B01J2220/46B01J2220/4868
Inventor 邵蓉蓉张勇郑菲菲姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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