Cellulose base adsorbing material for removing cations of heavy metal in water and preparation method of cellulose base adsorbing material

An adsorption material, cellulose-based technology, which is applied in the field of cellulose fiber surface functionalization to prepare water treatment adsorption materials, can solve the problems of heavy metals that cannot be degraded, not easily metabolized, and physiological disorders, and achieves convenient operation, high adsorption efficiency, and high adsorption. The effect of capacity

Active Publication Date: 2012-05-30
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although trace amounts of heavy metals are essential to the human body, animals, and plants, since heavy metals cannot be degraded, are not easily metabolized, and tend to accumulate in the body, a large amount of heavy metal intake can lead to a series of physiological disorders and diseases

Method used

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  • Cellulose base adsorbing material for removing cations of heavy metal in water and preparation method of cellulose base adsorbing material
  • Cellulose base adsorbing material for removing cations of heavy metal in water and preparation method of cellulose base adsorbing material
  • Cellulose base adsorbing material for removing cations of heavy metal in water and preparation method of cellulose base adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The cellulose (cellulose) obtained after the pulverization of the paper plate prepared by using rice straw as a raw material is used to prepare cellulose-g-PMAA (sample 1), and to test the adsorption performance of sample 1

[0036]In a 100ml one-mouth bottle, add 40ml ultrapure water, 1.3g (NH 4 ) 2 Ce(NO 3 ) 6 Dissolve fully with 1mL of nitric acid with a mass concentration of 65%-68%, then add 0.5g of cellulose fiber with a diameter of 1μm-100μm processed by a pulverizer, fully stir and disperse, bubble nitrogen for 30 minutes, and add 2mL monomer MAA, continue to sparge with nitrogen for 10 min. After sealing, place it in an oil bath at 70°C for 1 hour and pass Ce in an acidic water system 4+ Initiate free radical polymerization, graft polymerize MAA at the -OH place of cellulose to obtain carboxyl-containing MAA monomers on the surface of cellulose, and control the grafted PMAA containing carboxyl groups to be the total weight of the sample 1 About 16wt%. Air...

Embodiment 2

[0039] Using sawdust as raw material to prepare cellulose (cellulose) obtained after pulverizing the cardboard to prepare cellulose-g-PMAA (sample 2), and to test the adsorption performance of sample 2

[0040] In a 100ml one-mouth bottle, add 40ml ultrapure water, 0.25g (NH 4 ) 2 Ce(NO 3 ) 6 And 4.8mL mass concentration is the nitric acid of 65%-68%, fully dissolves, then add the cellulose fiber (the SEM photo of cellulose fiber see figure 1 ), fully stirred to disperse, nitrogen bubbled for 30 minutes, added 3mL monomer MAA, and continued nitrogen flow for 10 minutes. After sealing, place it in a water bath at 40°C for 4 hours and pass Ce in an acidic water system 4+ Initiate free radical polymerization, graft polymerize MAA at the -OH place of cellulose to obtain carboxyl-containing MAA monomer on the surface of cellulose, and control the grafted PMAA containing carboxyl group to be the total weight of sample 2 About 50wt% of it. Air was introduced to terminate the re...

Embodiment 3

[0043] Using sawdust as raw material to prepare cellulose-g-PAA (sample 3) from the cellulose (cellulose) obtained after the pulverization of the paper plate prepared by the raw material, and to test the adsorption performance of sample 3

[0044] In a 100ml one-mouth bottle, add 40ml ultrapure water, 2.3g (NH 4 ) 2 Ce(NO 3 ) 6 and 0.5mL of nitric acid with a mass concentration of 65%-68%, fully dissolved, then add 0.5g of cellulose fiber with a diameter of 1μm-100μm processed by a pulverizer, fully stir and disperse, nitrogen bubble for 30 minutes, add 4.5mL Monomer AA, continue to pass nitrogen for 10 minutes. After sealing, place it in a water bath at 40°C for 24 hours to react, and pass Ce in an acidic water system 4+ Initiate free radical polymerization, graft AA at the -OH of the cellulose to obtain a carboxyl-containing AA monomer on the surface of the cellulose, and control the grafted carboxyl-containing PAA to the total weight of the sample 3 About 11wt%. Air w...

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Abstract

The invention relates to a cellulose base adsorbing material for removing cations of heavy metal in water and a preparation method of the cellulose base adsorbing material. Natural cellulose or cellulose derivative fiber with the diameter of 10nm-100mum is adopted as a matrix material of an adsorbing material; polyolefin containing a carboxyl group is grafted on the surface of the matrix material of the cellulose, so that the surface of the matrix material of the cellulose is provided with the carboxyl group; and electrostatic attraction occurs on the carboxyl group and the cation of the heavy metal, so that Cd<2+>, Cr2<+>, Cu<2+>, Hg<2+>, Ni<2+>, Pb<2+> and/or Zn<2+> and other harmful cations in water are removed. Compared with adsorbing materials for the cations of the heavy metal in the prior art, the cellulose base adsorbing material adopts the natural cellulose or the cellulose derivative as an adsorption carrier, so that the cost performance is higher, and the content of the cations of the heavy metal in the water is greatly lower than that of state-specified standard.

Description

technical field [0001] The invention belongs to the field of preparing water treatment adsorption materials by functionalizing the surface of cellulose fibers, and in particular relates to a material for efficiently adsorbing heavy metal cations in water based on natural cellulose or cellulose derivatives and a preparation method thereof. Background technique [0002] "Heavy metal" is the atomic density greater than 6g cm -3 A general term for a class of metals and nonmetals, the common ones are cadmium (Cd, cadmium), chromium (Cr, chromium), copper (Cu, copper), mercury (Hg, mercury), nickel (Ni, nickel), lead ( Pb, lead), zinc (Zn, zinc). Although trace amounts of heavy metals are essential to the human body, animals, and plants, heavy metals cannot be degraded, are not easily metabolized, and tend to accumulate in the body, so the intake of large amounts of heavy metals can lead to a series of physiological disorders and diseases. For example, excessive copper can cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 黄勇吴敏田野
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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