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A kind of adsorbent that can be used to treat wastewater containing dyes and its preparation and application

A dye wastewater and adsorbent technology, which is applied in the fields of adsorbed water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problems of not meeting environmental protection requirements and difficult organic wastewater treatment, achieving easy operation and obvious effect. , the effect of simple preparation process

Inactive Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional wastewater treatment methods include physical and chemical methods, chemical methods, biochemical methods, physical adsorption methods, etc., but the current methods are very difficult to treat refractory organic wastewater, and only have a good removal effect on high-concentration dyes. Can no longer meet the increasingly high environmental protection requirements

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  • A kind of adsorbent that can be used to treat wastewater containing dyes and its preparation and application

Examples

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Effect test

Embodiment 1

[0022] A preparation method for an adsorbent that can be used to treat dye-containing wastewater, comprising the following steps:

[0023] (1) In a 500mL round-bottomed flask, add 69mL of concentrated sulfuric acid and 3g of pre-oxidized graphite solid and stir for 10min at a speed of 100r / min, then slowly add 9g of potassium permanganate under stirring conditions of 200r / min, and react The stage ensures that the temperature is lower than 10°C, and the temperature is kept for 30 minutes to obtain a uniformly dispersed pre-oxidized graphene suspension;

[0024] (2) Warm up the suspension obtained in step (1) to 32°C, and slowly add 60 mL of deionized water within 7 minutes under stirring at a rotation speed of 100 r / min, then add 3 g of microcrystalline cellulose and react for 30 minutes to obtain oxidized A mixture of graphene and nano-microcrystalline cellulose; after the reaction, filter while hot, and wash the filter cake with deionized water to neutrality, and dry to obtai...

Embodiment 2

[0026] A preparation method for an adsorbent that can be used to treat dye-containing wastewater, comprising the following steps:

[0027] (1) In a 500mL round bottom flask, add 69mL of concentrated sulfuric acid and 3g of pre-oxidized graphite solid and stir for 13min at a speed of 150r / min, then slowly add 9g of potassium permanganate under stirring conditions of 250r / min, and react The stage ensures that the temperature is lower than 10°C, and the temperature is kept for 40 minutes to obtain a uniformly dispersed pre-oxidized graphene suspension;

[0028] (2) Warm up the suspension obtained in step (1) to 35°C, and slowly add 67 mL of deionized water within 7 minutes under the stirring condition of 150 r / min, and then add 3 g of microcrystalline cellulose to react for 45 minutes to obtain oxidized A mixture of graphene and nano-microcrystalline cellulose; after the reaction, filter while hot, and wash the filter cake with deionized water to neutrality, and dry to obtain the...

Embodiment 3

[0030] A preparation method for an adsorbent that can be used to treat dye-containing wastewater, comprising the following steps:

[0031] (1) In a 500mL round bottom flask, add 69mL of concentrated sulfuric acid and 3g of pre-oxidized graphite solid and stir for 15min at a speed of 200r / min, then slowly add 9g of potassium permanganate under stirring conditions of 300r / min, and react The stage ensures that the temperature is lower than 10°C, and the temperature is kept for 50 minutes to obtain a uniformly dispersed pre-oxidized graphene suspension;

[0032] (2) Warm up the suspension obtained in step (1) to 38°C, and slowly add 70 mL of deionized water within 7 minutes under the stirring condition of 200 r / min, and then add 3 g of microcrystalline cellulose to react for 60 minutes to obtain oxidized A mixture of graphene and nano-microcrystalline cellulose; after the reaction, filter while hot, and wash the filter cake with deionized water to neutrality, and dry to obtain the...

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Abstract

The invention belongs to the field of functional materials, and discloses an adsorbent which can be used for treating dye-containing wastewater, as well as its preparation and application. The preparation method is as follows: adding pre-oxidized graphene solids and potassium permanganate to concentrated sulfuric acid successively, and obtaining a uniformly dispersed suspension by mechanical stirring; then adding deionized water and microcrystalline cellulose to react to obtain the Adsorbent graphene oxide / nanocrystalline cellulose composite material that can be used to treat dye-containing wastewater. Compared with graphene oxide, the graphene oxide / nanocrystalline cellulose composite material prepared by the present invention has greatly improved the adsorption capacity of dyes, especially for the adsorption effect of low-concentration dyes (<100mg / L), which is very obvious. Moreover, the preparation process is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to an adsorbent which can be used for treating wastewater containing dyes and its preparation and application. Background technique [0002] The dye industry is an important industry in the national economy, and its products are mainly used in textiles, leather, food, ink, paint and rubber. my country is a big country of dyestuffs, which can produce more than 600 varieties of dyestuffs, and the output and trade of dyestuffs rank first in the world. At the same time, the dye industry is also a high energy consumption and high pollution industry. During the production and use of dyes, about 8% to 20% of dyes are released into water. Dye wastewater has become an important factor threatening the safety of my country's water environment. [0003] Due to the complex process of the dye industry and the variety of dyes and their intermediates, the properties of dye wastewat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 杨飞张杨杨仁党王斌王瑞彬
Owner SOUTH CHINA UNIV OF TECH