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Adsorption treatment method for cationic dye

A cationic dye and adsorption treatment technology, which is applied in the field of adsorption treatment of cationic dyes, can solve the problems of high production cost by chemical method, non-uniform lignin performance, unsatisfactory application performance, etc., and achieves low preparation cost, wide and convenient sources, and easy to use. The effect of industrial production

Inactive Publication Date: 2017-05-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lignin has shown good application prospects and potential in the adsorption and separation of dye wastewater, its complex structure and polydispersity lead to inhomogeneous lignin performance, especially for unmodified lignin, its application performance Not ideal, to some extent limits its application
At present, chemical methods are mostly used to modify lignin, but the production cost of chemical methods is high, the process is relatively complicated, and may cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method comprises the steps of:

[0028] (1) Classification of water-soluble lignin and water-insoluble lignin: fully stir 30g of corn alkali lignin and 500ml of distilled water for 20h, then 40KHz ultrasonic assisted treatment for 2min, fully stir, settle and separate, filter, collect settled and filtered solids, vacuum Dry for 20 hours to obtain 17g of water-insoluble lignin.

[0029] (2) Classification of ketone-soluble lignin and ketone-insoluble lignin: fully mix 17g of water-insoluble lignin and 500ml of acetone solvent for 18h, 40KHz ultrasonic assisted treatment for 3min, fully stir, settle and separate, filter, collect settled and filtered solids, and obtain Water-insoluble ketone-insoluble lignin 8g, collect filtrate at the same time, and it is rotary-evaporated and recovered acetone solvent in rotary evaporator, rotary evaporation temperature is 50 ℃, cooling temperature-15 ℃, rotating speed is 80r / min, obtains water-insoluble ketone solution Lignin 9g. ...

Embodiment 2

[0032] The method comprises the steps of:

[0033] (1) Classification of water-soluble lignin and water-insoluble lignin: fully mix 50g of poplar lignin with 500ml of distilled water for 16h, assisted by ultrasonic treatment for 3min, fully stir, settle and separate, filter, collect the sediment and filter, then vacuum dry the solid for 24h to obtain water Insoluble lignin 35g.

[0034] (2) Classification of ketone-soluble lignin and ketone-insoluble lignin: fully mix 35g of water-insoluble lignin and 500ml of methyl ethyl ketone solvent for 20h, assisted by ultrasonic treatment for 2min, stir fully, settle and separate, filter, collect settled and filtered solids, and obtain Water-insoluble ketone-insoluble lignin 15g, collect the filtrate at the same time, and recycle it in a rotary evaporator to recover the acetone solvent. Lignin 20g.

[0035] (3) The products of water-insoluble ketone-insoluble lignin and water-insoluble ketone-soluble lignin were vacuum-dried at 45° C....

Embodiment 3

[0037] The method comprises the steps of:

[0038] (1) Classification of water-soluble lignin and water-insoluble lignin: fully mix 30g of wheatgrass lignin with 1000ml of distilled water for 18h, assisted by ultrasonic treatment for 3min, stir fully, settle and separate, filter, collect and settle, and dry the solid in vacuum for 48h to obtain water Insoluble lignin 18g.

[0039] (2) Classification of ketone-soluble lignin and ketone-insoluble lignin: fully mix 18g of water-insoluble lignin and 1000ml of pentanone solvent for 15h, assisted by ultrasonic treatment for 3min, stir fully, settle and separate, filter, collect the settled and filtered solid, and obtain Water-insoluble ketone-insoluble lignin 7g, collect the filtrate at the same time, and recycle it in a rotary evaporator to recover the acetone solvent. Lignin 11g.

[0040](3) The products of water-insoluble ketone-insoluble lignin and water-insoluble ketone-soluble lignin were vacuum-dried at 40° C. for 20 hours....

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Abstract

The invention relates to an adsorption treatment method for cationic dye. The adsorption treatment method for the cationic dye comprises the following steps: firstly utilizing water to classify lignin into a water soluble fraction and a water insoluble fraction, then utilizing a ketone solvent to classify the water insoluble lignin fraction into a ketone soluble fraction and a ketone insoluble fraction again, and using the finally obtained water insoluble and ketone insoluble fraction for adsorbing and separating cationic dye methylene blue, cationic brilliant red, crystal violet, methyl violet and the like. The dissolution classification method only relates to dissolution classification of lignin and does not relate to chemical modification, so that the method provided by the invention has the advantages of simple technology and low cost; and water and the ketone solvent used for dissolution classification can be repeatedly utilized by recycling, and no consumption or loss is produced, so that the method provided by the invention has the advantage of being environment-friendly.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an adsorption treatment method for cationic dyes. Background technique [0002] With the rapid development of the printing and dyeing industry, various new dyes have been put into production and use, and the water quality of dye wastewater has become more and more complicated, and the pollution caused by it to the environment has become increasingly serious. According to the ionic state of dye molecules dissociated in aqueous solution, dyes are usually divided into: anionic dyes, cationic dyes, and nonionic dyes. Cationic dyes have quaternary ammonium cations in their molecules, and because of the basic groups in the cationic part of their molecular structure, they are also called basic dyes or basic dyes. Because of its many types, high chroma, strong toxicity, and large amount of water to be treated, it is a typical industrial wastewater that is difficult to degra...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F9/04B01J20/24B01J20/30
CPCB01J20/24C02F1/286C02F1/52C02F1/66C02F9/00C02F2101/308C02F2301/08
Inventor 李浩常立芳李春利苏伟怡杜静静
Owner HEBEI UNIV OF TECH
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