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Heavy metal ion adsorption film and preparation method thereof

A technology of heavy metal ions and adsorption membranes, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., and can solve problems such as different treatment methods and limitations

Inactive Publication Date: 2017-12-08
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different types of heavy metals exist in different forms in water, and the water quality is different, so the treatment methods are also different. At present, effective separation processes for removing heavy metals include precipitation, ion exchange, electrochemical treatment, membrane technology, evaporation and solidification, etc., but these technologies Applications are limited by technology and economy

Method used

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  • Heavy metal ion adsorption film and preparation method thereof

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preparation example Construction

[0020] A heavy metal ion adsorption membrane and a preparation method thereof, comprising the following steps:

[0021] (1) Preparation of Acetobacter xylinum medium (g / L): glucose 10, peptone 10, yeast powder 7.5, Na 2 HPO 4 10, pH 6.0, pasteurized.

[0022] (2) First activate Gluconoacetobacter xylinum, then inoculate the seed liquid into the culture medium according to the inoculation amount of 3% by volume, put it into a 30°C constant temperature incubator and cultivate it for 6 days, then take out the cellulose film and wash it with water After rinsing, the cellulose membrane was put into a pot and boiled for 15 minutes, and the operation was repeated until the pH was close to neutral to obtain a purified bacterial cellulose membrane.

[0023] (3) Place the bacterial cellulose membrane obtained after culturing for six days in distilled water, and add 0.01 mol and 0.02 mol of cationic etherification agent dropwise into the distilled water respectively at 60° C., and then...

Embodiment 1

[0029] (1) Preparation of Acetobacter xylinum medium (g / L): glucose 10, peptone 10, yeast powder 7.5, Na 2 HPO 4 10, pH 6.0, pasteurized.

[0030] (2) First activate Gluconoacetobacter xylinum, then inoculate the seed liquid into the culture medium according to the inoculation amount of 3% by volume, put it into a 30°C constant temperature incubator and cultivate it for 6 days, then take out the cellulose film and wash it with water After rinsing, the cellulose membrane was put into a pot and boiled for 15 minutes, and the operation was repeated until the pH was close to neutral to obtain a purified bacterial cellulose membrane.

[0031] (3) The bacterial cellulose membrane obtained by culturing for six days was placed in distilled water. At 60° C., 0.01 mol of cationic etherification agent was added dropwise to the distilled water, and then reacted for 12 hours.

[0032] (4) dissolving chitosan in acetic acid solution to form a chitosan acetic acid solution with a concentr...

Embodiment 2

[0037] (1) Preparation of Acetobacter xylinum medium (g / L): glucose 10, peptone 10, yeast powder 7.5, Na 2 HPO 4 10, pH 6.0, pasteurized.

[0038] (2) First activate Gluconoacetobacter xylinum, then inoculate the seed liquid into the culture medium according to the inoculation amount of 3% by volume, put it into a 30°C constant temperature incubator and cultivate it for 6 days, then take out the cellulose film and wash it with water After rinsing, the cellulose membrane was put into a pot and boiled for 15 minutes, and the operation was repeated until the pH was close to neutral to obtain a purified bacterial cellulose membrane.

[0039] (3) The bacterial cellulose membrane obtained by culturing for six days was placed in distilled water. At 60° C., 0.01 mol of cationic etherification agent was added dropwise to the distilled water, and then reacted for 12 hours.

[0040] (4) dissolving chitosan in acetic acid solution to form a chitosan acetic acid solution with a concentr...

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Abstract

The invention discloses a heavy metal ion adsorption film and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: 1, fermenting to produce bacterial cellulose by using acetobacter xylinum; 2, obtaining a bacterial cellulose film and performing purification treatment on the bacterial cellulose film, then performing cationization on the cellulose film by taking 3-chloro-2-hydroxypropyl trimethyl ammonium chloride as an etherifying agent; 3, performing crosslink blending reaction on the cationized bacterial cellulose film and chitosan, so as to obtain a chitosan-bacterial cellulose composite material. The composite material prepared by the invention has a better adsorption effect on heavy metal ions, can effectively remove the heavy metal ions in domestic sewage and industrial wastewater, and can be recycled and reused. The composite material has good application prospect in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a heavy metal ion adsorption membrane and a preparation method thereof Background technique [0002] In recent years, with the rapid development of my country's economy, heavy metal wastewater has been produced in many production processes in industries such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Due to the unqualified discharge of major industrial and mining enterprises, serious heavy metal ion pollution has been caused. Heavy metal pollution in water is extremely harmful to ecology and human health. It mainly includes metals with significant biological toxicity such as mercury, lead, chromium, and arsenic, and also includes zinc, copper, cobalt, and nickel with certain toxicity. Heavy metals mainly enter the human body through the food chain and can seriously endanger human health. Japan once suffered...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/24C02F1/28C02F101/20
CPCB01J20/24B01J20/28033B01J2220/445B01J2220/4825B01J2220/4868C02F1/286C02F2101/20
Inventor 钟成孙忠岩贾士儒侯颖谭之磊
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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