A composite gel material for heavy metal sewage treatment

A composite gel and sewage treatment technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as complex composition of heavy metal ions, adsorption capacity and comprehensive performance limitations, etc. Achieve the effects of improving thermal stability and mechanical strength, good regeneration and reusability, and performance improvement

Inactive Publication Date: 2018-06-26
广西和润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, although there are many research reports on improving or improving the performance of silica airgel in various aspects, due to the complex composition of heavy metal ions in sewage materials, most of the currently available gel daughter-in-law materials are single-ionic and The single network structure greatly limits the adsorption capacity and comprehensive performance of the product. It is the development trend in the field of sewage heavy metal adsorption to provide a gel composite material with good comprehensive adsorption performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Use a certain amount of 26% sodium silicate solution (the mass ratio of acrylic acid to sodium silicate is 0.13:1) to neutralize 36 parts of acrylic acid in an ice-water bath, and then use 21% NaOH solution to neutralize the acrylic acid Degree 65%;

[0029] (2) Add 58 parts of polyvinyl alcohol into deionized water at a mass concentration of 8-12%, stir and disperse evenly, then condense and reflux in a constant temperature water bath at 90-95°C for 2-3 hours until the polyvinyl alcohol is completely dissolved , to obtain polyvinyl alcohol solution;

[0030] (3) Mix the above (1) and (2) solutions, stir at room temperature for 24 hours, add 2.5% ammonium persulfate and 0.07 parts of N,N'-methylenebisacrylamide solution, 3 parts of sulfuric acid Zinc, stir well and transfer to a plastic test tube, seal it, and place it for 24 hours;

[0031] (4) Put the test tube in a 50°C water bath to react for 3 hours, take it out, and place it overnight;

[0032] (5) Soak the...

Embodiment 2

[0037] (1) Use a certain amount of 26% sodium silicate solution (the mass ratio of acrylic acid to sodium silicate is 0.15:1) to neutralize 40 parts of acrylic acid in an ice-water bath, and then use 21% NaOH solution to neutralize the acrylic acid Degree 65%;

[0038] (2) Add 60 parts of polyvinyl alcohol into deionized water at a mass concentration of 8-12%, stir and disperse evenly, then condense and reflux in a constant temperature water bath at 90-95°C for 2-3 hours until the polyvinyl alcohol is completely dissolved , to obtain polyvinyl alcohol solution;

[0039] (3) Mix the above (1) and (2) solutions, stir at room temperature for 24 hours, add 0.02 parts of ammonium persulfate, 0.05 parts of N,N'-methylenebisacrylamide, 4 parts of zinc carbonate, and stir well Then move it into a plastic test tube, seal it, and place it for 24 hours;

[0040] (4) Put the test tube in a 50°C water bath to react for 3 hours, take it out, and place it overnight;

[0041] (5) Soak the ...

Embodiment 3

[0046] (1) Use a certain amount of 26% sodium silicate solution (the mass ratio of acrylic acid to sodium silicate is 0.18:1) to neutralize 39 parts of acrylic acid in an ice-water bath, and then use 21% NaOH solution to neutralize the acrylic acid Degree 65%;

[0047] (2) Add 62 parts of polyvinyl alcohol into deionized water at a mass concentration of 8-12%, stir and disperse evenly, then place it in a constant temperature water bath at 90-95°C to condense and reflux

[0048] The steps of the adsorption test for heavy metal ions are as follows:

[0049]Add a heavy metal ion solution with a concentration of 1mg / ml into a 50ml centrifuge tube, add 0.2-0.5g of the composite gel material of the present invention respectively, and measure the maximum adsorption capacity of the heavy metal ion adsorbent of the present invention within 5min to 300min. The maximum adsorption capacity of the composite gel for Cu2+, Cr3+ and Pb2+ was obtained after testing, and the results are listed...

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Abstract

The invention discloses a composite gel material for adsorbing metal ions in wastewater treatment. According to the composite gel material, crylic acid and polyvinyl alcohol serve as raw materials for synthesis, a trace of N, N'-methylene bisacrylamide and nano-silica are utilized to conduct auxiliary crosslinking on the raw materials, the organic / inorganic composite gel material is obtained, the composite gel material is utilized to conduct surface crosslinking treatment so as to improve the surface characteristic of the gel, and the gel material is prepared. The composite gel material has the advantages of being rapid, efficient, high in adsorption capacity and high in selectivity, a remarkable effect on adsorption of heavy metal ions is achieved, and meanwhile the composite gel material is simple in preparation process and high in operability.

Description

technical field [0001] The invention relates to a composite gel material for heavy metal sewage treatment, and belongs to the technical field of metal-organic / inorganic composite materials. Background technique [0002] Traditional heavy metal treatment methods mainly include chemical treatment, ultrafiltration and adsorption. Although the chemical method has a fast purification speed and a simple process, it is prone to secondary pollution and difficult to recycle the wastewater; the ultrafiltration method is complicated in process, high in cost and poor in effect; the adsorption method is currently the most commonly used method in the treatment of heavy metal wastewater with low cost. , simple operation, no secondary pollution and other advantages. [0003] Currently commonly used adsorbents such as activated carbon, zeolite, ion resin, chelating resin, etc., have been well applied. However, the above-mentioned adsorbents have disadvantages such as low adsorption capacit...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
CPCB01J20/0244B01J20/103B01J20/22B01J20/26C02F1/285C02F2101/20C02F2101/22
Inventor张拓伟
Owner广西和润环保科技有限公司