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Preparation method of crop straw dye adsorption material

A technology for crop straws and adsorption materials, which is applied in the field of preparation of dye adsorption materials for crop straws, can solve the problems of less application research on dye adsorption properties, and achieve sustainable development of agriculture, improve the degree of dispersion, and save nitrogen devices. Effect

Inactive Publication Date: 2014-06-25
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the preparation method of straw composite superabsorbent resin is mainly to conduct gelatinization, acid, alkali or acid anhydride treatment on straw first, and then react with corresponding functional monomers, mainly to study the water absorption, water retention and salt absorption performance of straw composite superabsorbent resin, and There are few studies on the application of dye adsorption properties. At present, there are no reports at home and abroad about the preparation of phytic acid modified straw dye adsorption materials and their application research on the adsorption of cationic dye solutions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Cut corn stalks into pieces, wash them four times with deionized water, dry them in an oven at 80°C, crush them, and sieve 200-mesh corn stalk powder, add 20 g of corn stalk powder to 200 g of N,N-dimethylformaldehyde In the amide, put it in an ultrasonic cleaning tank with a frequency of 50kHz and a power of 500W at 50°C for 20 minutes, then add 15g of phytic acid and 2g of urea to the above system, raise the temperature to 60°C, and cool the product to room temperature after 5h of reaction , filtered, washed 5 times with ethanol, dried in an oven at 80°C, and crushed to obtain phytic acid-modified corn stalks; 5g NaOH was dissolved in 250mL deionized water, and then 10g itaconic acid was slowly added dropwise to NaOH aqueous solution in an ice bath , stir well, add 13.8g of phytic acid modified corn stalks, 30g of acrylamide, 6g of vinylpyrrolidone and 0.23g of N,N'-methylenebisacrylamide after reacting for 2h, stir well for 30min, and gradually raise the temperature t...

Embodiment 2

[0032] Cut wheat straw into pieces, wash with deionized water three times, dry in an oven at 80°C, crush, and sieve 100-mesh wheat straw powder, add 60g of wheat straw powder to 200g of N,N-dimethyl formazan In the amide, put it in an ultrasonic cleaning tank with a frequency of 30kHz and a power of 300W at 30°C for 60 minutes, then add 30g of phytic acid and 6g of urea to the above system, raise the temperature to 80°C, and cool the product to room temperature after 3 hours of reaction. Filtrate, wash with ethanol for 5 times, dry in an oven at 70°C, and crush to obtain phytic acid-modified wheat straw; dissolve 4.8g of NaOH in 250mL of deionized water, and then slowly drop 15g of itaconic acid into NaOH aqueous solution in an ice bath , stir well, add 9g of phytic acid modified wheat straw, 20g of acrylamide, 10g of vinylpyrrolidone and 0.36g of ethylene glycol diacrylate after reacting for 2h, stir fully for 30min, gradually raise the temperature to 50°C, and then add 0.33g ...

Embodiment 3

[0034] Cut sorghum straw into pieces, wash with deionized water 4 times, dry in an oven at 80°C, crush, sieve 200-mesh sorghum straw powder, add 30g of sorghum straw powder to 200g of N,N-dimethyl formazan In the amide, put it in an ultrasonic cleaning tank with a frequency of 80kHz and a power of 3000W for 40 minutes at 50°C, then add 20g of phytic acid and 3.5g of urea to the above system, raise the temperature to 90°C, and cool the product to Filter at room temperature, wash with ethanol three times, dry in an oven at 80°C, and crush to obtain phytic acid-modified sorghum straw; dissolve 8g of NaOH in 250mL of deionized water, and slowly add 20g of itaconic acid to NaOH aqueous solution dropwise in an ice bath In the process, stir well, add 7.2g of phytic acid modified sorghum straw, 20g of acrylamide, 8g of vinylpyrrolidone and 0.192g of ethylene glycol diacrylate after reacting for 0.5h, stir well for 30min, gradually raise the temperature to 60°C, and then Slowly add 0.7...

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Abstract

The invention relates to a preparation method of a crop straw dye adsorption material. The preparation method is characterized by comprising the process steps of adding straw powder into N, N-dimethylformamide, putting into an ultrasonic cleaning tank to perform ultrasonic treatment for 20-60 minutes at 30-50 DEG C, then adding phytic acid and urea into the system, heating to 50-90 DEG C, reacting for 2-6 hours, then cooling a product to the room temperature, precipitating, washing, drying and crushing to obtain phytic acid modified straw; neutralizing itaconic acid by using NaOH, then adding the phytic acid modified straw, acrylamide, vinyl pyrrolidone and a crosslinking agent, fully stirring for 30 minutes, then gradually heating to 50-60 DEG C, and finally slowly dropwise adding a redox initiator into a polymerization system to initiate a polymerization reaction for 3-5 hours; and after polymerization, precipitating, washing and drying to obtain the crop straw dye adsorption material. The adsorption capacity of the crop straw dye adsorption material to a cationic dye aqueous solution with the initial concentration of 200-2000mg / L is 195-1400mg / g, the decolorization rate of the crop straw dye adsorption material is 55-90%, and the crop straw dye adsorption material can reach adsorption equilibrium after 100-200 minutes of room temperature adsorption, and can be widely applied to the adsorption, separation and purification of cationic dyes, the environmental pollution control of cationic dye wastewater, and the like.

Description

technical field [0001] The invention relates to a method for preparing a crop straw dye adsorption material. The crop straw dye adsorption material prepared by the invention is suitable for the adsorption, separation and decolorization of cationic dyes, and can be widely used in the adsorption, separation and purification of cationic dyes and cationic dye wastewater. environmental pollution control, etc. Background technique [0002] Dye wastewater is colored wastewater containing dyes. It mainly comes from dye and dye intermediate production industries and textile, leather, paper, rubber, plastic, cosmetics, pharmaceutical and food industries. It has complex composition, large changes in water quantity and quality, and color. It is one of the most difficult industrial wastewater to treat due to the characteristics of high concentration, high concentration of COD and BOD, high suspended solids, and many refractory biodegradable substances. In addition, dye wastewater not on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/56C08F222/02C08F226/10C08F4/40B01J20/26B01J20/30C02F1/28C02F103/30
Inventor 万涛熊磊孙萌萌覃莉莉谭雪梅胡俊燕
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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