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Porous foam body heavy metal adsorption material preparation method

A technology of adsorption material and porous foam, which is applied in the preparation of heavy metal adsorption materials and the field of preparation of porous foam heavy metal adsorption materials, which can solve the problems of difficult separation and achieve the effects of convenient use, cost reduction, and recyclable use

Active Publication Date: 2015-07-08
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current adsorption materials are powder products, and it is difficult to effectively separate them from the soil after being blended with the soil for adsorption.

Method used

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  • Porous foam body heavy metal adsorption material preparation method
  • Porous foam body heavy metal adsorption material preparation method
  • Porous foam body heavy metal adsorption material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 0.5g chitosan, 2.0g acrylamide, 2.0g acrylic acid, 1.25g N,N' -Methylenebisacrylamide, 3.5g of fatty alcohol polyoxyethylene ether surfactant, 0.5g of initiator potassium persulfate are dispersed in 10 mL of water; after each component is dissolved, add 60 mL of liquid paraffin to the mixed solution and stir 4h; the obtained high-concentration emulsion was put into a columnar tube, sealed, and polymerized at 50°C for 12h. The obtained polymer was extracted by Soxhlet with n-hexane for 48 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a porous adsorption material. The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of 325 mg / g and 586 mg / g were respectively.

Embodiment 2

[0044] Mix 1.0g chitosan, 2.0g 2-acrylamide-2-methyl-propanesulfonic acid, 1.0g methyl methacrylate, 0.5 g ethylene glycol dimethacrylate, 2.0 g sorbitol under stirring at 300rpm Fatty acid ester surfactants, 2.0g polyoxyethylene and polyoxypropylene block copolymer surfactants, and 0.2g initiator ammonium persulfate were dispersed in 20 mL of water; after each component was dissolved, drop Add 60 mL of n-octane and stir for 1 h; the obtained high-concentration emulsion is put into a columnar tube, sealed, and polymerized at 40°C for 24 h. The obtained polymer was Soxhlet-extracted with n-hexane for 12 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a porous adsorption material. The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of 218 mg / g and 524 mg / g were respectively.

Embodiment 3

[0046] Mix 1.0 g chitosan, 2.0 g methacrylic acid, 0.5 g hydroxypropyl methacrylate, 2.5 g trimethylolpropane trimethacrylate, 5.0 g alkylphenol polyethylene oxide ether under stirring at 600 rpm Disperse 0.75 g ammonium persulfate-like surfactant and initiator in 15 mL water; after each component is dissolved, add 55 mL of toluene dropwise to the mixed liquid and stir for 1 h; Polymerization 12h. The obtained polymer was extracted by Soxhlet with n-hexane for 24 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a porous adsorption material. The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of 332 mg / g and 605 mg / g respectively.

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Abstract

The invention provides a porous foam body heavy metal adsorption material preparation method through a high internal-phase emulsion template method and belongs to the technical field of high-molecular materials. In the method, with water as a continuous phase, an organic solvent as an organic dispersed phase, a nonionic surfactant as an emulsion stabilizer, chitosan as a grafting framework and a polymerizable functional monomer as a grafting monomer, a white porous foam body material is prepared through the high internal-phase emulsion template method in the presence of an initiator and a crosslinking agent. An experimental result proves that the porous foam body heavy metal adsorption material not only contains abundant porous structures so that adsorption rate and capacity to heavy metal are greatly increased, but also has a quite excellent repeatable performance. Meanwhile, the material is in the form of a porous foam body so that the material is convenient to use and can be recycled when being used in heavy metal-polluted soil treatment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a heavy metal adsorption material, in particular to a method for preparing a porous foam heavy metal adsorption material by using a high internal phase emulsion template method. Background technique [0002] Heavy metals exist in water, soil, and atmosphere in various physical and chemical forms, and migrate, accumulate, absorb, and transform in the environment, thereby endangering human health through the food chain, such as carcinogenesis and teratogenicity. With the development of my country's industrialization, water and soil heavy metal pollution has become a difficult point to control. [0003] The Ministry of Environmental Protection and the Ministry of Land and Resources issued the "National Soil Pollution Survey Bulletin", pointing out that the overall rate of soil pollution in the country is 16.1%, and the rate of cadmium an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J2/28B01J20/30B09C1/00
Inventor 王爱勤朱永峰宗莉康玉茹王文波
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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