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Preparation method of magnetic lignin-based adsorbent and application thereof

An adsorbent, lignin technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of unstable properties, easy oxidation, and low adsorption performance, and achieve good adsorption performance. , easy to operate, green and efficient effect

Inactive Publication Date: 2017-10-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But due to Fe 3 o 4 The properties are not very stable, easy to oxidize, and the adsorption performance is not very high, so it is often compounded and modified to protect its magnetic properties and improve the adsorption performance during application.

Method used

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  • Preparation method of magnetic lignin-based adsorbent and application thereof
  • Preparation method of magnetic lignin-based adsorbent and application thereof
  • Preparation method of magnetic lignin-based adsorbent and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] At room temperature, accurately weigh 0.1g of Fe 3 o 4 / C, put it into a 100mL beaker, add 50mL of deionized water to disperse evenly in the ultrasonic wave, and prepare the magnetic fluid. Then, accurately weigh 4g of lignosulfonate, add it into a 250mL three-necked flask, add 39mL of deionized water, then mechanically stir at 60°C, and reflux in a water bath for 30min. Then, the magnetic fluid prepared above was added into the three-necked flask, stirred mechanically, and continued to reflux in the water bath for 30 minutes. Then add 6 mL of triethylenetetramine to the above mixture, stir mechanically, and reflux in the water bath for 10 minutes, then add 5 mL of cross-linking agent dropwise using a constant pressure dropping funnel, stir mechanically, and reflux in the water bath for 70 minutes. After the reaction, it was magnetically separated and washed with deionized water to obtain a beige precipitate, which was dried in vacuum at 60° C. overnight and ground to...

Embodiment 2

[0036] At room temperature, accurately weigh 0.25g of Fe 3 o 4 / C, put it into a 100mL beaker, add 50mL of deionized water to disperse evenly in the ultrasonic wave, and prepare the magnetic fluid. Then, accurately weigh 4g of lignosulfonate, add it into a 250mL three-necked flask, add 39mL of deionized water, then mechanically stir at 60°C, and reflux in a water bath for 30min. Then, the magnetic fluid prepared above was added into the three-necked flask, stirred mechanically, and continued to reflux in the water bath for 30 minutes. Then add 6 mL of triethylenetetramine to the above mixture, stir mechanically, and reflux in the water bath for 10 minutes, then add 5 mL of cross-linking agent dropwise using a constant pressure dropping funnel, stir mechanically, and reflux in the water bath for 70 minutes. After the reaction, it was magnetically separated and washed with deionized water to obtain a beige precipitate, which was dried in vacuum at 60° C. overnight and ground to ...

Embodiment 3

[0041] At room temperature, accurately weigh 0.5g of Fe 3 o 4 / C, put it into a 100mL beaker, add 50mL of deionized water to disperse evenly in the ultrasonic wave, and prepare the magnetic fluid. Then, accurately weigh 4g of lignosulfonate, add it into a 250mL three-necked flask, add 39mL of deionized water, then mechanically stir at 90°C, and reflux in a water bath for 30min. Then, the magnetic fluid prepared above was added into the three-necked flask, stirred mechanically, and continued to reflux in the water bath for 30 minutes. Then add 6 mL of triethylenetetramine to the above mixture, stir mechanically, and reflux in the water bath for 10 minutes, then add 5 mL of cross-linking agent dropwise using a constant pressure dropping funnel, stir mechanically, and reflux in the water bath for 70 minutes. After the reaction, it was magnetically separated and washed with deionized water to obtain a beige precipitate, which was dried in vacuum at 60° C. overnight and ground to...

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Abstract

The invention belongs to the technical field of composite material synthesis, and relates to a preparation method of a magnetic lignin-based adsorbent, and especially relates to the preparation method of the magnetic lignin-based adsorbent and an application thereof. The method comprises the following steps: a solvothermal method is used for preparing magnetic Fe3O4, the magnetic Fe3O4 is coated by glucose to prepare Fe3O4 / C, through water-bath backflow, calcium lignin sulphonate is taken as a main raw material for compositing the Fe3O4 / C, triethylene tetramine is used for performing aminating modification on the composite material, so that the magnetic lignin-based adsorbent is prepared, which can be used for adsorption treatment for waste water pollution. The lignosulfonate structure has many active functional groups, has certain ion exchange and adsorption performances, and can prepare the magnetic lignin-based adsorption materials with various function through magnetic composition. The method has the advantages of simple process flow, easy operation, easily available raw material, and low cost of raw material, realizes greenization of a synthesis technology and high-efficiency utilization of the waste calcium lignin sulphonate, can reuse papermaking waste, and reduces environment pressure; and the magnetic lignin-based adsorbent has good adsorptive property, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of composite material synthesis, and relates to a preparation method of a lignin-based adsorbent, in particular to a preparation method and application of a magnetic lignin-based adsorbent. Background technique [0002] At present, water pollution is already very serious, especially the pollution of dyes and heavy metal ions. Adsorption is a relatively simple and convenient technology to deal with water pollution. Due to the advantages of large specific surface area, high saturation magnetization and easy functionalization of the surface, magnetic nanoparticles have been widely used in various fields such as medicine and water treatment. Fe 3 o 4 According to the material, nanomaterials are inorganic metal nanoparticles, which is a kind of iron oxide magnetite, which is easy to prepare, has a very active surface, and is easy to adsorb and fix metals or ligands; it has paramagnetism and can be separated by ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/06B01J20/20B01J20/24B01J20/28009C02F1/281C02F1/283C02F1/286
Inventor 王莹莹李小环丁永梅王义军王晓红郝臣高海文
Owner JIANGSU UNIV
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