Alkali lignin micro-nanosphere/paper-based adsorption material and its preparation method and application in the treatment of dye wastewater

Abstract

The invention discloses an alkali lignin micro-nano ball / paper-based adsorption material, a preparation method thereof and an application in treating dye wastewater. The present invention first utilizes potassium persulfate and ammonium ferrous sulfate as initiator to improve the group activity of alkali lignin; then utilizes stearyl chloride as esterification reagent, N,N-dimethylformamide as solvent, triethylamine As an acid coating agent and catalyst, the degree of acetylation of alkali lignin is controlled by controlling the ratio of stearyl chloride and alkali lignin; then tetrahydrofuran is used as solvent, cyclohexane is used as anti-solvent, and the original Preparation of alkali lignin micro-nanospheres. The alkali lignin micro-nano spheres prepared by the invention are micro-nano-scale spherical reverse micelles with hydrophobic surface and hydrophilic interior, which can be well dispersed on water or loading materials and are not easy to agglomerate. In addition, the adsorption material of the present invention can be made into various shapes, is convenient to use, has high adsorption efficiency, can be recycled and reused, and can be used for many times with low cost.

Description

Alkali lignin micro-nanosphere / paper-based adsorption material and preparation method thereof application in waste water technical field The invention belongs to adsorption material and dyestuff wastewater treatment technical field, be specifically related to a kind of alkali lignin micro-nano Ball / paper-based adsorbent material and preparation method thereof and application in treating dye wastewater. Background technique Papermaking and printing and dyeing industries all can discharge the high content of organic pollutants, and the waste water with deep color and large alkalinity, how to have Efficient treatment of these wastewaters has become a major issue and challenge of global concern. Rhodamine B is an aromatic heterocyclic compound often For hemp, silk fabrics, cotton, paper, bamboo and wood coloring, widely used. The dye wastewater containing Rhodamine B has high concentration, The chromaticity is deep, the toxicity is high, and it has a great impact on ...

AI Technical Summary

Problems solved by technology

[0010] In the prior art, most of the lignin-based adsorption materials are made of lignin under high temperature conditions to make porous activated carbon, but in this process, the original oxygen-containing functional groups in lignin molecules will be converted into CO2 at high temperature. 2 , the reduction of the content of functional groups on lignin carbon that play a role in adsorption limits the adsorption performance of lignin porous carbon, and the preparation process of lignin porous carbon requires high energy consumption, thus hindering the practical application

[0011] At present, most alkali lignin adsorption materials are in a highly aggregated state in aqueous solution, with a small specific surface area. A large number of adsorbable sites are embedded in the lignin and cannot perform adsorption, thus limiting its adsorption performance and thus cannot be efficiently adsorbed. waste water treatment

In addition, the alkali lignin adsorption materials prepared in the prior art are difficult to reuse, the cost of use is high, the adsorption effect is poor, the service life is short, and it is not easy to recycle.

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