Preparation method of modified bagasse cellulose based heavy metal adsorbent

A cellulose-based, heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of uneconomical extraction process, complicated steps, application restrictions, etc., and achieve environmental protection Friendly adsorption effect, simple preparation method, and the effect of solving secondary pollution

Inactive Publication Date: 2012-10-10
GUANGXI UNIV
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  • Abstract
  • Description
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Problems solved by technology

The chemical precipitation method mainly uses alkaline substances, such as limestone or soda, to precipitate heavy metals in the form of hydroxides. This method requires complicated steps to reduce the concentration of heavy metal ions to a certain extent, so it is not economical and effective; activated carbon from The efficiency of removing heavy metals from wastewater is high, but its application is limited due to its high cost; for low concentration and large volume aqueous solutions, the extraction process is very uneconomical

Method used

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  • Preparation method of modified bagasse cellulose based heavy metal adsorbent

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Embodiment 1

[0031] Weigh 2g of dried cellulose into 20ml of dimethyl sulfoxide, heat and stir in a water bath at 60°C for gelatinization for 20 minutes, add 50ml of deionized water to the gelatinized cellulose, Then add 0.5g of initiator ammonium persulfate, feed nitrogen, and initiate at a temperature of 60°C for 30 minutes; add 5g of acrylic acid to the above mixed system, mix well and react at 50°C for 60 minutes to obtain a graft copolymerization product, Finally, 2 g of diethylenetriamine was added dropwise, reacted at the same temperature for 40 min, and the obtained product was repeatedly washed with distilled water, and then dried at 60° C. for 5 h to obtain the crude product of the fiber-based heavy metal adsorbent.

Embodiment 2

[0033] Weigh 2g of dried cellulose into 20ml of dimethyl sulfoxide, heat and stir in a water bath at 60°C for gelatinization for 20 minutes, add 50ml of deionized water to the gelatinized cellulose, Then add 0.5g of initiator ammonium persulfate, feed nitrogen, and initiate at a temperature of 60°C for 30 minutes; add 2g of acrylic acid to the above mixed system, mix well and react at 50°C for 60 minutes to obtain a graft copolymerization product. Finally, 2 g of diethylenetriamine was added dropwise, reacted at the same temperature for 40 min, and the obtained product was repeatedly washed with distilled water, and then dried at 60° C. for 5 h to obtain the crude product of the fiber-based heavy metal adsorbent.

Embodiment 3

[0035] Weigh 2g of dried cellulose into 20ml of dimethyl sulfoxide, heat and stir in a water bath at 60°C for gelatinization for 20 minutes, add 50ml of deionized water to the gelatinized cellulose, Then add 0.5g of initiator cerium ammonium nitrate, feed nitrogen, and initiate at a temperature of 60°C for 30 minutes; add 5g of acrylic acid to the above mixed system, mix well and react at 50°C for 60 minutes to obtain a graft copolymerization product, Finally, 1 g of diethylenetriamine was added dropwise and reacted at the same temperature for 40 minutes. The obtained product was repeatedly washed with distilled water and dried at 60° C. for 5 hours to obtain the crude product of the fiber-based heavy metal adsorbent.

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Abstract

The invention relates to a preparation method of a modified bagasse cellulose based heavy metal adsorbent. The preparation method comprises the technological steps of: defibering natural fibers, washing with distilled water and ethanol, stirring and activating in NaOH solution, putting the fibers into dimethyl sulfoxide for water-bath heating and gelatinization, adding deionized water and initiators, feeding in nitrogen for initiation and adding acrylic acid monomers for reaction to obtain graft copolymerization products; adding polyethylene polyamine monomers for reaction, washing and drying to obtain crude cellulose based heavy metal adsorbent; and washing with deionized water, soaking and rinsing in ethanol, rewashing with deionized water, extracting by using acetone and drying to obtain the refined heavy metal adsorbent. The preparation method provided by the invention has the advantages that the method is simple, the cost is low, the environmental friendliness is good, the adsorption effect is excellent, the method is compliant with the concept of circular economy and sustainable development, the problem of secondary pollution caused by bagasse combustion is solved, the water bodies which are polluted by heavy metals are purified and the economic advantage is remarkable.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal adsorbent, in particular to a preparation method of a modified bagasse cellulose-based heavy metal adsorbent. Background technique [0002] With the 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 the removal of heavy metal ions in wastewater: chemical precipitation, activated carbon adsorption, solvent extraction, and ion adsorption and exchange. The chemical precipitation method mainly uses alkaline substances, such as limestone or soda, to precipitate heavy metals in the form of hydroxides. This method requires complicated steps to reduce the concentration of heavy metal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24C02F1/28C02F1/62
Inventor 王英辉刘运杰朱红祥李平阳张俊熊建华杨惟薇
Owner GUANGXI UNIV
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