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Preparation method of modified amorphophallus konjac gulcomannan carbon microsphere heavy-metal absorption material

A technology of glucomannan carbon microspheres and adsorption materials, applied in the fields of phytochemistry and adsorption science, can solve the problems of difficult control of conditions, harsh production conditions, low degree of substitution of modified products of konjac glucomannan, etc. The effect of reducing the treatment cost and improving the adsorption performance

Inactive Publication Date: 2015-04-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the patent document CN102161711 A, konjac glucomannan was chemically modified to prepare a heavy metal adsorption material, but the preparation method of the adsorption material is complicated, the process is difficult, the production conditions are harsh, and industrialization is difficult.
In the master's thesis "Konjac Glucomannan Cross-linked Carboxymethyl Modification and Its Adsorption and Desorption Properties of Metal Ions", a preparation method of cross-linked carboxymethyl modified adsorption material was introduced, and the research was carried out. Its adsorption performance for heavy metals, the preparation scheme of this adsorption material is complicated, the conditions are difficult to control, and the degree of substitution of the obtained konjac glucomannan modified product is not very high

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  • Preparation method of modified amorphophallus konjac gulcomannan carbon microsphere heavy-metal absorption material
  • Preparation method of modified amorphophallus konjac gulcomannan carbon microsphere heavy-metal absorption material

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Embodiment 1

[0021] Step 1. Add 0.7g of konjac glucomannan to 40g of ultrapure water, stir to obtain a sticky cloudy liquid, heat the sticky cloudy liquid in a hydrothermal reactor at 180°C for 12 hours, and then dissolve the reaction solution Centrifuge at a speed of 10000r / min for 20min, wash the centrifuged solid with ethanol for 3 times, and then vacuum-dry at 60°C for 24h to obtain konjac glucomannan carbon microspheres;

[0022] Step 2: Adjust the pH of 100 mL of aqueous ethanol solution to 4.5 with acetic acid solution with a volume fraction of 5%, add 30 mL of 3-mercaptopropyltriethoxysilane solution with a volume fraction of 1.5% into the aqueous ethanol solution and shake for 2 hours to obtain a modified liquid; the volume ratio of alcohol to water in the ethanol aqueous solution is 1:1;

[0023] Step 3: Take 5g of konjac glucomannan carbon microspheres prepared in step 1 and add them to 100g of the modified liquid prepared in step 2, shake for 3 hours, filter, and dry the filter...

Embodiment 2

[0026] Step 1. Add 0.5g of konjac glucomannan to 30g of ultrapure water, stir to obtain a viscous turbid solution, heat the viscous turbid solution in a hydrothermal reactor at 160°C for 8 hours, and then dissolve the reaction solution Centrifuge at a speed of 10000r / min for 20min, wash the centrifuged solid with ethanol for 3 times, and then vacuum-dry it at 50°C for 24h to obtain konjac glucomannan carbon microspheres;

[0027] Step 2: Adjust the pH of 100 mL of aqueous ethanol solution to 4.5 with 1% acetic acid solution by volume fraction, add 30 mL of 3-mercaptopropyltriethoxysilane solution with 1% volume fraction into the aqueous ethanol solution and shake for 2 hours to obtain modified liquid; the volume ratio of alcohol to water in the ethanol aqueous solution is 1:1;

[0028] Step 3: Take 3g of konjac glucomannan carbon microspheres prepared in step 1 and add them to 100g of the modified liquid prepared in step 2, shake for 3 hours, filter, and dry the filter cake at...

Embodiment 3

[0030] Step 1. Add 1g of konjac glucomannan to 50g of ultrapure water, stir to obtain a viscous turbid liquid, heat the viscous turbid liquid in a hydrothermal reactor at 200°C for 16 hours, and then place the reaction solution in Centrifuge at a speed of 10000r / min for 20min, wash the centrifuged solid with ethanol for 5 times, and then vacuum-dry at 80°C for 12h to obtain konjac glucomannan carbon microspheres;

[0031] Step 2. Adjust the pH of 100 mL of aqueous ethanol solution to 4.5 with 5% acetic acid solution by volume fraction, add 50 mL of 3-mercaptopropyltriethoxysilane solution with 3% volume fraction into the aqueous ethanol solution and shake for 2 hours to obtain modified liquid; the volume ratio of alcohol to water in the ethanol aqueous solution is 1:1;

[0032] Step 3: Add 15g of konjac glucomannan carbon microspheres prepared in step 1 to 100g of the modified liquid prepared in step 2, shake for 5 hours, filter, and dry the filter cake at 65°C, and use the dr...

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Abstract

The invention discloses a preparation method of a modified amorphophallus konjac gulcomannan carbon microsphere heavy-metal absorption material. The preparation method comprises the following steps: (1) adding 0.5-1 part by weight of amorphophallus konjac gulcomannan to 30-50 parts by weight of ultrapure water, stirring to obtain a turbid solution, reacting the turbid solution at 160-200 DEG C for 8-16 hours to obtain a reaction liquid, centrifugalizing the reaction liquid at 10000r / m for 20 minutes, cleaning an obtained solid for 3-5 times by using ethanol, and drying to obtain a carbon microsphere; (2) regulating the pH of an alcohol-water solution to 4.5 by using an acid solution with the volume fraction of 1%-5%, adding a silane coupling agent solution with the volume fraction of 1%-3% to the alcohol-water solution, and oscillating for 2 hours to obtain a modified solution; and (3) adding 3-15 parts by weight of carbon microspheres to 100 parts by weight of modified solutions, oscillating for 3-5 hours, filtering, drying a filter cake at 65 DEG C, washing the dried filter cake for 3-5 times by using the ethanol and water, and carrying out vacuum drying to prepare the modified amorphophallus konjac gulcomannan carbon microsphere absorption material. The preparation method disclosed by the invention can be used for overcoming the defects of high process difficulty, severe preparation condition and the like of a traditional heavy-metal waste water adsorption material and preparing the modified amorphophallus konjac gulcomannan carbon microsphere heavy-metal absorption material by adopting a simple and easily-operated process.

Description

technical field [0001] The invention belongs to the field of phytochemistry and adsorption science, and in particular relates to a preparation method of konjac glucomannan carbon microsphere heavy metal adsorption material. Background technique [0002] Heavy metal ions mainly come from mining smelting, mechanical processing, electroplating, and petrochemical industries. Most of the wastewater generated by these industries is directly discharged into lakes, rivers, and oceans, which not only pollutes the water environment, but also rapidly deteriorates water quality. With the development of industry, its sewage discharge is increasing year by year. It has become an indisputable fact that water pollution, especially heavy metal pollution in water, seriously endangers the survival of various organisms including human beings. In recent years, the threat of heavy metal pollution to human health and living environment has attracted widespread attention of scientists from various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/20B01J20/28B01J20/305B01J2220/42C02F1/283C02F1/62C02F2101/20
Inventor 张红平陈盼盼罗学刚林晓艳张永德唐苹苹
Owner SOUTHWEAT UNIV OF SCI & TECH