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Preparation method of heavy metal ion enrichment cellulosic material

A technology of heavy metal ions and cellulose, which is applied in fiber raw materials, fiber raw material processing, textiles and papermaking, etc., can solve problems such as high operating costs, difficulty in popularization and use, and complicated processing and preparation processes, and achieves simple operation methods, low prices, The effect of long-lasting chemical stability

Inactive Publication Date: 2012-03-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although, in recent years there has been the use of thiol-modified mesoporous silica [Feng, X.; Fryxell, G.E.; Wang, L.-Q.; Kim, A.Y.; Liu, J.; Kemner, K.M. Science 1997, 276, 923-926], oxygen- and nitrogen-modified nanoporous activated carbons [Xio, B.; Thomas, K.M. Langmuir 2005, 21, 3892-3902], amino-modified block copolymers [Bell, C.A.; Smith, S.V.; Whittaker, M.R.; Whittake, r A.K.; Gahan, L.R.; Monteiro, M.J.Adv.Mater.2006, 18, 582-586] and other materials used in the report of heavy metal ion treatment, but because of the complex preparation process and high operating costs, it is difficult promotional use

Method used

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  • Preparation method of heavy metal ion enrichment cellulosic material
  • Preparation method of heavy metal ion enrichment cellulosic material
  • Preparation method of heavy metal ion enrichment cellulosic material

Examples

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Embodiment 1

[0034] Embodiment 1: Prepare heavy metal ion-enriched cellulose material with the method provided by the invention, and use this material to treat divalent copper ions in aqueous solution:

[0035] First, the heavy metal ion-enriched cellulose material in the present invention is prepared.

[0036] 1) Prepare a 500 mM tetramethoxysilane solution in methanol as a solvent, and stir at room temperature for 2 hours.

[0037] 2) Put ordinary quantitative filter paper (produced by Hangzhou Xinhua Co., Ltd., Zhejiang Province) in a suction filtration device, rinse it with ethanol for 2 to 3 times, and dry it with air flow. Take 20mL of tetramethoxysilane solution and add it into the suction filtration device, let it stand for 15 minutes, so that tetramethoxysilane is deposited on the filter paper fiber.

[0038] 3) Slowly filter the tetramethoxysilane solution under low vacuum. When the liquid level of the solution is close to the surface of the filter paper, add methanol to rinse f...

Embodiment 2

[0046] Embodiment 2: Prepare heavy metal ion-enriched cellulose material with the method provided by the invention, and use this material to treat divalent mercury ions in aqueous solution:

[0047] First, the heavy metal ion-enriched cellulose material in the present invention is prepared.

[0048] According to the preparation method and steps of Example 1, the difference is that a 1 mM STMS (3-mercaptopropyltrimethoxysilane) solution is prepared using toluene as a solvent, and a STMS molecular monolayer heavy metal ion-enriched cellulose material is obtained.

[0049] Then, the STMS molecular monolayer heavy metal ion enrichment material was used for the adsorption of mercury ions.

[0050] Put the STMS molecular monolayer heavy metal ion enriched cellulose material in the suction filtration device, add 50mL of mercury nitrate solution with a concentration of 30ppm, let it filter freely, add the filtrate to the suction filtration device again, and cycle like this 10 times, t...

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Abstract

The invention relates to a preparation method of heavy metal ion enrichment cellulosic material; in the method, natural cellulosic material fiber is adopted as the matrix, tetramethyl silane is take as the precursor and the surface sol-gel method is utilized to deposit silica film on the surface of the filter paper fiber; subsequently, ligand molecule monolayer sensitive to copper ion and mercuryion are introduced through self-assembly to obtain the heavy metal ion enrichment cellulosic material; the heavy metal ion solution can be simply filtered by the material prepared by the method of the invention to realize the absorption effect. The heavy metal ion enrichment cellulosic material has superior heavy metal ion enrichment performance, broad raw material source range, low price, simplepreparation method, high absorption speed, high sensitiveness and can realize the treatment of waste water containing heavy ions simply, rapidly and economically.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal ion-enriched cellulose material, in particular to a preparation method of a surface-modified cellulose material with enrichment effects on copper ions and mercury ions. Background technique [0002] In recent decades, with the rapid development of modern industry, many pollutants containing heavy metal ions have entered the atmosphere, water and soil environment, causing serious environmental pollution. Heavy metal ions are not easy to decompose and easily cause secondary pollution. They can accumulate through bioaccumulation in the food chain, and once ingested, they will endanger human health. Therefore, the purification of heavy metal ions in sewage is very important. At present, many physical and chemical methods are used for the enrichment of heavy metal ions, among which electrolysis, precipitation and adsorption are the main methods. However, the electrolysis method consumes a lot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/00
Inventor 黄建国张学海
Owner ZHEJIANG UNIV
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