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Preparation method of alkali lignin-based adsorbing material modified by sodium glutamate and application in removal of wastewater dyes

A technology of alkali lignin and sodium glutamate, which is applied in the direction of adsorption of water/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve the problems of secondary pollution, limit the degree of wastewater treatment and utilization, etc., and achieve the improvement of adsorption effect , good adsorption effect and low cost

Inactive Publication Date: 2016-07-20
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are many methods for removing dye molecules in water at home and abroad, such as: ion exchange method, membrane separation method, precipitation method, etc. The limitations of these methods limit the application of these methods in wastewater treatment
The adsorption method has attracted much attention because of its simplicity and high removal efficiency, but some chemically synthesized adsorbents cause secondary pollution to the environment during the synthesis process.

Method used

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  • Preparation method of alkali lignin-based adsorbing material modified by sodium glutamate and application in removal of wastewater dyes
  • Preparation method of alkali lignin-based adsorbing material modified by sodium glutamate and application in removal of wastewater dyes
  • Preparation method of alkali lignin-based adsorbing material modified by sodium glutamate and application in removal of wastewater dyes

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Embodiment 1

[0031] A preparation method of sodium glutamate modified alkali lignin-based adsorption material, comprising the following steps:

[0032] (1) Fully dissolve the industrial alkali lignin in the alkaline aqueous solution, control the pH of the alkaline aqueous solution to 11, stir for 2 hours, and filter with suction to remove insoluble impurities;

[0033] (2) Adjust the pH of the filtrate to 3 with hydrochloric acid solution, stir to make the alkali lignin fully analyzed;

[0034] (3) Suction filtration and washing to neutrality, and the obtained filter residue is dried in a constant temperature drying oven for 24 hours, and ground to obtain purified alkali lignin;

[0035] (4) Prepare the purified alkali lignin into a solution with a mass fraction of 5%, and then add sodium glutamate and formaldehyde to it, and the mass ratio of the purified alkali lignin, sodium glutamate and formaldehyde is 7.5: 7.5:5; react at 60°C for 6 hours;

[0036] (5) After the reaction is over, cool and adj...

Embodiment 2

[0042] A preparation method of sodium glutamate modified alkali lignin-based adsorption material, comprising the following steps:

[0043] (1) Fully dissolve the industrial alkali lignin in the alkaline aqueous solution, control the pH of the alkaline aqueous solution to 12, stir for 4 hours, and filter with suction to remove insoluble impurities;

[0044] (2) Adjust the pH of the filtrate to 2 with dilute sulfuric acid solution and stir to make the alkali lignin fully analyzed;

[0045] (3) Suction filtration and washing to neutrality, the obtained filter residue is dried in a constant temperature drying oven for 48 hours, and ground to obtain purified alkali lignin;

[0046] (4) The purified alkali lignin is formulated into a solution with a mass fraction of 10%, and then sodium glutamate and formaldehyde are added to it. The mass ratio of the purified alkali lignin, sodium glutamate and formaldehyde is 10: 10:9; react at 50°C for 8 hours;

[0047] (5) After the reaction is over, coo...

Embodiment 3

[0049] A preparation method of sodium glutamate modified alkali lignin-based adsorption material, comprising the following steps:

[0050] (1) Fully dissolve the industrial alkali lignin in the alkaline aqueous solution, control the pH of the alkaline aqueous solution to 11-12, stir for 2-5h, and filter with suction to remove insoluble impurities;

[0051] (2) Adjust the pH of the filtrate to 3~6, ​​stir to make the alkali lignin fully analyzed;

[0052] (3) Suction filtration and washing to neutrality, the obtained filter residue is dried in a constant temperature drying oven for 24 to 48 hours, and then ground to obtain purified alkali lignin;

[0053] (4) The purified alkali lignin is formulated into a solution with a mass fraction of 4-20%, and then sodium glutamate and formaldehyde are added to it. The mass ratio of the purified alkali lignin, sodium glutamate and formaldehyde is 8:8:5; react at 50~80℃ for 4~20 hours;

[0054] (5) After the reaction is over, cool and adjust the pH...

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Abstract

The invention discloses a preparation method of an alkali lignin-based adsorbing material modified by sodium glutamate and an application in removal of wastewater dyes. The preparation method comprises the steps of purifying the alkali lignin, modifying alkali lignin by using sodium glutamate, and the like. The application is characterized in that the alkali lignin-based adsorbing material is used for simultaneously adsorbing malachite green of a cationic dye and eosin-B of an anionic dye, and comprises the following steps of adding the alkali lignin-based adsorbing material modified by sodium glutamate into a water solution with pH (potential of hydrogen) value of 2 to 7, wherein the water solution contains 10 to 100mg L<-1> of malachite green or eosin-B; adsorbing for 0.5 to 7.5h at the temperature of 15 to 55 DEG C, centrifuging and separating, adjusting a filtrate to the neutral condition, and draining. The preparation method has the advantages that the method of using the alkali lignin-based adsorbing material to remove the malachite green of the cationic dye and the eosin-B of the anionic dye in the wastewater is simple and feasible, the secondary pollution to environments is avoided, and the application prospect is good.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a method for simultaneously removing cations and anionic dyes in wastewater by using an adsorption material, and in particular to a method for preparing a glutamic acid-modified alkali lignin-based adsorption material and simultaneously removing waste water Application of cationic dye malachite green and anionic dye eosin B. Background technique [0002] At present, the development of the printing and dyeing industry has led to the development of the dye production industry, and the consequent problem is that the discharged wastewater containing dyes pollutes the environment. Most dyes have complex structures, are difficult to degrade, and are potentially carcinogenic. The dye-containing wastewater has a low light transmittance, which seriously affects the growth and development of aquatic organisms in the water body, thereby causing great harm to our human life. The direct dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24C02F1/286C02F2101/308
Inventor 唐裕芳曾永德周蔷赵月梅
Owner XIANGTAN UNIV
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