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Preparation method of hemicellulose-based heavy metal ion adsorbent

A technology of heavy metal ions and hemicellulose, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of high substitution degree, high extraction rate, simple operation and easy control.

Inactive Publication Date: 2012-04-11
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is no relevant report on the application of plasma and ultrasonic waves in the graft copolymerization reaction of hemicellulose, so that the hemicellulose has better adsorption capacity for heavy metal ions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Extraction of hemicellulose:

[0029] Take 60g of bagasse raw material and 18g of sodium chlorite and add them to 2000ml of water, react at 75°C for 1 hour in an acidic environment, then add 18g of sodium chlorite, and continue the reaction for 1 hour to remove lignin to obtain synthetic cellulose. The cellulose is placed in a solution of KOH with a mass percentage concentration of 8%, solid g: liquid mL=1:20, and then the mixed solution of the above-mentioned helium cellulose and KOH is placed in an ultrasonic pulverizer to strengthen the helium cellulose Treatment, adjust the power to 300W, after ultrasonic treatment for 3h, filter with a G2 filter, take the filtrate, and neutralize the filtrate with 6mol / L acetic acid to a pH of 5.5, then use three times the volume of the above filtrate to precipitate and filter the ethanol, After washing with ethanol, dry in a vacuum dryer at 60° C. for 24 hours to obtain 15.2 g of hemicellulose.

[0030] 2) Preparation of adsor...

Embodiment 2

[0034]1) Extraction of hemicellulose:

[0035] Take 60g of bagasse raw material and 18g of sodium chlorite and add them to 2000ml of water, react at 75°C for 1 hour in an acidic environment, then add 18g of sodium chlorite, and continue the reaction for 1 hour to remove lignin to obtain synthetic cellulose. The cellulose is placed in a solution of KOH with a mass percentage concentration of 8%, solid g: liquid mL=1:20, and then the mixed solution of the above-mentioned helium cellulose and KOH is placed in an ultrasonic pulverizer to strengthen the helium cellulose Treatment, adjust the power to 700W, after ultrasonic treatment for 3h, filter with a G2 filter, take the filtrate, and neutralize the filtrate with 6mol / L acetic acid to a pH of 5.5, then use three times the volume of the above-mentioned filtrate for ethanol precipitation and filtration, Washed with ethanol and dried in a vacuum oven at 60°C for 24 hours to obtain 15.8 g of hemicellulose.

[0036] 2) Preparation o...

Embodiment 3

[0040] 1) Extraction of hemicellulose:

[0041] Take 60g of bagasse raw material and 18g of sodium chlorite and add them to 2000ml of water, react at 75°C for 1 hour in an acidic environment, then add 18g of sodium chlorite, and continue the reaction for 1 hour to remove lignin to obtain synthetic cellulose. The cellulose is placed in a solution of KOH with a mass percentage concentration of 8%, solid g: liquid mL=1:20, and then the mixed solution of the above-mentioned helium cellulose and KOH is placed in an ultrasonic pulverizer to strengthen the helium cellulose Treatment, adjust the power to 500W, after ultrasonic treatment for 3h, filter with a G2 filter, take the filtrate, and neutralize the filtrate with 6mol / L acetic acid to a pH of 5.5, then use three times the volume of the above-mentioned filtrate for ethanol precipitation and filtration, Wash with ethanol and dry in a vacuum oven at 60° C. for 24 hours to obtain 16.4 g of hemicellulose.

[0042] 2) Preparation of...

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Abstract

The invention discloses a preparation method of hemicellulose-based heavy metal ion adsorbent mainly comprising conducting graft copolymerization triggered by free radial under the intensifying effect of ultrasonic. The adsorbent prepared by the invention not only retains excellent properties of hemicellulose, but also has heavy metal ion absorption capacity. The adsorbent is an important adsorbing material with sustainable development.

Description

technical field [0001] The invention relates to the technical field of modification of hemicellulose, in particular to a method for preparing a hemicellulose-based heavy metal ion adsorbent by using hemifiber extracted from natural plant materials. Background technique [0002] With the rapid development of modern industry, the discharge of industrial wastewater containing heavy metal ions seriously pollutes the environment and endangers human health. Therefore, the removal of heavy metal ions in wastewater and the recovery of precious metal ions are becoming more and more important for sustainable development. At present, there are four main methods for removing heavy metal ions in wastewater: chemical precipitation, activated carbon adsorption, solvent extraction, and ion exchange and adsorption. The chemical precipitation method mainly uses traditional methods such as limestone or soda to precipitate heavy metals in the form of their hydroxides. This method requires compl...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F1/64
Inventor 朱红祥夏南南王双飞唐江涛覃程荣熊建华王英辉杨富杰
Owner GUANGXI UNIV
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