A method of preparing a cellulose-based difunctional adsorbent

A cellulose-based, adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of simple technical implementation, less use of chemical reagents, and a wide range of applicable materials

Inactive Publication Date: 2017-07-04
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for efficient separation of harmful substances from water by creating two types of molecules called monoads or dipoles that stick together at different points along their length. These particles have specific properties such as being able to bind either positively or negatively depending upon whether they come into contact with each other during this process. By modifying these surfaces, we aimed towards improving the efficiency of removing various compounds like organics, pesticides, etc., without causing damage to our environment' s resources.

Problems solved by technology

The technical problem addressed in this patented patent relates to finding ways to treat contaminating waters that contain various substances such as lead (Pb), cadmium(Cd) , zinc(Zn). These solutions involve developing efficient and cost-effective purification techniques without generating negative side effects like damaging aquatic environments. Natural resources represent promising alternatives but they also pose potential threats due to their long lifespan and disposability. Biological remedy offers promise because it does not require expensive equipment or dangerous processes during operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After removing dust, sand, grass clippings and other impurities, bagasse is put into a 2% sodium hydroxide solution and boiled for 10 minutes, washed with water, dried and cut to about 0.5cm; then dispersed in water, controlled drying The solid-to-liquid ratio of bagasse to water is 1g:20mL, ultrasonic treatment for 20min; after filtration, it is placed in a 10% sodium hydroxide solution, stirred for 60min at 20℃, dried bagasse and 10% hydroxide The solid-liquid ratio of the sodium solution is controlled to be 1g:30mL; the ultrasonic treatment is continued for 10 minutes, filtered, washed with water to neutrality and dried. The ultrasonic treatment temperature is controlled at 30-40°C, and the ultrasonic power is 800W.

[0023] Weigh 5g of the sample pretreated above and oxidize it with sodium periodate. The specific process is: mass-volume concentration of sodium periodate aqueous solution is 5g / L, temperature is 45℃, reaction time is 2h, solid-liquid ratio is 1g: 30mL; ...

Embodiment 2

[0025] First, put the cotton fiber into a 5% sodium hydroxide solution and boil it for 30 minutes, wash it with water, dry it and cut it to about 1cm; then disperse it in water to control the solid-liquid ratio to 1g:30mL, ultrasonic Treat for 30min; after filtering, put it into 18% sodium hydroxide solution, stir for 90min at 20℃, and control the solid-liquid ratio to 1g:30mL; continue ultrasonic treatment for 20min, filter and wash until neutral and drying. The ultrasonic treatment temperature is controlled at 30-40°C, and the ultrasonic power is 1000W.

[0026] Weigh 5g of the sample pretreated above and oxidize it with sodium periodate. The specific process is: mass-volume concentration of sodium periodate aqueous solution is 8g / L, temperature is 45℃, reaction time is 2h, solid-liquid ratio is 1g: 50mL; after the reaction, the sample is filtered out, washed to neutrality and vacuum dried. Put the above sample into a three-necked flask, then add 150mL of N,N-dimethylformamid...

Embodiment 3

[0028] Boil the viscose fiber in 2% sodium hydroxide solution for 10 minutes, wash with water, dry and cut to about 1 cm; then disperse it in water, control the solid-liquid ratio to 1g:30mL, and ultrasonically treat it for 20 minutes; After filtration, put it into a 10% sodium hydroxide solution, stir for 30min at 20℃, and control the solid-liquid ratio to 1g:30mL; continue ultrasonic treatment for 10min, filter, wash until neutral and dry. The ultrasonic treatment temperature is controlled at 30-40°C, and the ultrasonic power is 500W.

[0029] Weigh 5g of the sample pretreated above and oxidize it with sodium periodate. The specific process is: mass-volume concentration of sodium periodate aqueous solution is 4g / L, temperature is 45℃, reaction time is 1h, solid-liquid ratio is 1g: 30mL; after the reaction, the sample is filtered out, washed to neutrality and vacuum dried. Put the above sample into a three-necked flask, then add 100mL of N,N-dimethylacetamide and 20g of maleic ...

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Abstract

A method of preparing a cellulose-based difunctional adsorbent is disclosed. The method includes (1) a step of preliminary treatment, namely a step of removing impurities of a cellulose-based raw material, then boiling the raw material in a sodium hydroxide solution, washing the raw material with water, drying the raw material and cutting the raw material into pieces; (2) a step of pretreatment, namely a step of subjecting the raw material to ultrasonic wave-alkali solution-ultrasonic wave combined treatment, and (3) a step of chemical modification, namely a step of subjecting the raw material to selective oxidation treatment, then adding the oxidized cellulose into a reaction medium, adding an anhydride into the reaction medium, stirring, refluxing and reacting the mixture, performing filtration after the reaction is finished, washing a product, drying the product, reacting the product with a polyamine compound, performing filtration, washing an obtained product with water until neutrality, and freeze-drying the product to obtain the cellulose-based difunctional adsorbent. The adsorbent prepared by the method is high in safety stability, has good adsorption functions for anion pollutants and cation pollutants, and can be used for cleaning treatment of heavy metal ion waste water and dye waste water. The source of the cellulose-based raw material used for preparing the adsorbent is wide, and the cost is low. Operation is convenient when the adsorbent is used for waste water treatment.

Description

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Claims

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Application Information

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Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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