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Cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and preparation method thereof

A cellulose-based, adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of difficult treatment, high material cost, and many reaction by-products, etc., and achieve a wide working pH. The effect of large range, large specific surface area and high adsorption capacity

Inactive Publication Date: 2011-08-03
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing arsenic and fluorine removal technologies at home and abroad have many shortcomings.
Firstly, arsenic and fluorine cannot be removed at the same time; secondly, the existing arsenic removal technology needs to remove AsO 2 - (III) Oxidation to AsO 4 3- (V), the process is complex; in addition, at present most of them use inorganic salts to remove arsenic and fluorine, which have many by-products, are difficult to handle, and easily cause secondary pollution; moreover, the cost of materials is high, and it is difficult to regenerate and reuse limit their application in industry

Method used

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  • Cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and preparation method thereof
  • Cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and preparation method thereof
  • Cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Use rice straw as raw material to prepare cellulose (cellulose) obtained after pulverization of paper plates, prepare cellulose (cellulose)-g-PDMAEMA (sample 1), and test the adsorption performance of sample 1

[0033] In a 100ml single-mouth bottle, add 40ml ultrapure water, 1.5g (NH 4 ) 2 Ce(NO 3 ) 6 And 1mL of nitric acid with a mass concentration of 65%-68%, fully dissolve it, then add 0.5g of cellulose fibers with a diameter of 1μm-100μm processed by a pulverizer, fully stir and disperse, bubble with nitrogen for 30 minutes, add 3mL monomer DMAEMA, continue to purge nitrogen for 10 minutes. After sealing, place it in an oil bath at 100°C for 1 hour, and pass Ce in an acidic water system 4+ Initiation of free radical polymerization, graft polymerization of DMAEMA at -OH of cellulose, to obtain amine-containing DMAEMA monomer grafted on the surface of cellulose, and control the grafting of about 18wt% of amine-containing PDMAEMA. Air is introduced to terminate the react...

Embodiment 2

[0036] The cellulose (cellulose) obtained after pulverization of the paper plate prepared with wood chips as raw materials was used to prepare cellulose-g-PDMAEMA (sample 2), and the adsorption performance of sample 2 was tested

[0037] In a 100ml single-mouth bottle, add 40ml ultrapure water, 1.0g (NH 4 ) 2 Ce(NO 3 ) 6 And 2mL of nitric acid with a mass concentration of 65%-68%, fully dissolve it, and then add 0.5g of cellulose fibers with a diameter of 1μm-100μm processed by a crusher (scanning electron microscope (SEM) photos of cellulose fibers are shown figure 1 ), fully stir and disperse, bubbling with nitrogen for 30 minutes, add 3 mL of monomer DMAEMA, and continue to bubbling with nitrogen for 10 minutes. After sealing, place it in a 40℃ water bath to react for 3 hours, pass Ce in an acidic water system 4+ Initiation of free radical polymerization, graft polymerization of DMAEMA at -OH of cellulose, to obtain amine-containing DMAEMA monomer grafted on the surface of cellu...

Embodiment 3

[0043] The cellulose (cellulose) obtained after pulverization of the paper plate prepared with wood chips as raw materials, the preparation of cellulose-g-PDMAEMA (sample 3), and the test of the adsorption performance of sample 3

[0044] In a 100ml single-mouth bottle, add 40ml ultrapure water, 2.0g (NH 4 ) 2 Ce(NO 3 ) 6 And 3mL of nitric acid with a mass concentration of 65%-68%, fully dissolve it, and then add 0.5g of cellulose fibers with a diameter of 1μm-100μm processed by a pulverizer, fully stir and disperse, bubble with nitrogen for 30 minutes, and add 2mL of monomer DEA, continue to purge nitrogen for 10 minutes. After sealing, place it in a 20℃ water bath to react for 24 hours, and pass Ce in an acidic water system. 4+ Initiate free radical polymerization, graft polymerize DEA at -OH of cellulose, obtain DEA monomer containing amine group on the surface of cellulose, and control grafting about 8wt% of PDEA containing amine group. The reaction was terminated by introduc...

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Abstract

The invention relates to a cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and a preparation method thereof. In the invention, natural cellulose or fibers of cellulose derivatives with the diameter of 10nm-100mu m is taken as matrix material for the absorption material; polyolefin containing an amino group is grafted on the surface of the cellulose matrix material, thus the surface of the cellulose matrix material contains the amino group; and electrostatic attraction can be realized between the contained amino group and arsenate anions, arsenite anions and fluoric ions in water, thus the harmful ions, namely the arsenate anions, arsenite anions and fluoric ions in water can be removed. Compared with the arsenic and fluorine removing material in the prior art, the material provided by the invention has the advantages that the natural cellulose or cellulose derivative is taken as an absorption carrier, the fluoric ions, arsenate anions and arsenite anions in water can be simultaneously absorbed, and the contents of the arsenic and fluorine in water can be far less than the national standards.

Description

Technical field [0001] The invention belongs to the field of cellulose fiber surface functionalized preparation of water treatment adsorption materials, and particularly relates to a material for efficiently adsorbing arsenate ions, arsenite ions and fluoride ions in water based on natural cellulose or cellulose derivatives and the same Preparation. Background technique [0002] Arsenic is a protoplasmic poison with a wide range of biological effects. It has been identified as the first category of carcinogen by the Centers for Disease Control (CDC) and the International Agency for Research on Cancer (IARC). Fluorine is an essential trace element for the human body and plays a very important role in the metabolism of teeth and bones. However, once the human body's daily intake of fluoride exceeds normal needs for a long time, it will destroy the normal metabolism of calcium and phosphorus, inhibit the action of enzymes, and affect the function of endocrine glands. my country’s ...

Claims

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Application Information

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IPC IPC(8): B01J20/24C02F1/28C02F1/58
Inventor 黄勇吴敏吴大勇田野
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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