Preparation method of fiber membrane material for heavy metal ion adsorption

A technology for absorbing heavy metal ions and fibers, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., to achieve enhanced adsorption effect and easy operation

Pending Publication Date: 2021-11-05
GUIZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research on the adsorption of heavy metals by extracellular polymers focuses on the adsor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Agricultural waste rice straw stalk cutting and crushing process, object 40 taken in diameter straw fiber, then impregnated with 30% strength hydrogen peroxide, ozone in conjunction with aeration and ultrasound-induced hydrogen peroxide into hydroxyl radicals, the fibers again connection of a white sponge rice straw fiber network of a plurality of layers of thin fibers, and then dried to constant weight at a temperature of 50 ℃. Glucomannan powder was dissolved in water, stirred until dissolved, a homogeneous solution of glucomannan, sodium hydroxide was then added to the solution adjusted to pH 10, stirring was continued for 0.5h, to obtain poly deacetylation Konjac sugar solution. The resulting white fibrous the sponge immersed in deionized water, all soaked sponge wetted fibers to white and then adding extracellular polymers, wherein sodium carbonate and stirred vigorously for about IH continuously, the mixed solution was added again deacetylase Konjac...

Example Embodiment

[0026] Example 2

[0027] Agricultural waste straw and corn stover cutting crushing process, taking in a particle size of 50 mesh straw fiber, then impregnated with 20% strength hydrogen peroxide, ozone in conjunction with aeration and ultrasound-induced hydrogen peroxide into hydroxyl radicals, the fibers again connection of a white corn stover by a multi-ply sponge fiber network of fibers, and then dried to constant weight at a temperature of 60 ℃. Glucomannan powder was dissolved in water, stirred until dissolved, a homogeneous solution of glucomannan, potassium hydroxide was then added to the solution adjusted to pH 11, stirring was continued for 0.5h, to obtain poly deacetylation Konjac sugar solution. The resulting white fibrous the sponge immersed in deionized water, all soaked sponge wetted fibers to white and then adding extracellular polymers, sodium carbonate, and wherein the continuous stirred vigorously for about 2h, mixture was added again deacetylase Konjac glycans,...

Example Embodiment

[0029] Example 3

[0030] Cut the agricultural straw waste-sausage, cut the crushing treatment, take the straw fiber of 80 mesh, and then impregnated with 25% concentration of hydrogen oxide, while mixing ozone aeration and ultrasonic induced bioxide into hydroxy free radicals, so that the fibers are re-formed The connection obtained by a white sugarcane slag fiber sponge consisting of a multilayer thin fiber network, and then dried at 70 ° C to constant weight. The glucosaccharide powder was dissolved in water, stirred until dissolved, obtained a homogeneous glycan solution, and then adding sodium hydroxide to a solution to adjusting the pH of 12, continued to stir 0.5 h, resulting in deacetyl gluca Sugar solution. The aforementioned white fiber sponge was immersed in the ionized water, soaking to the white fiber sponge all wet, then adding the extracellular polymer therefrom, and the sodium carbonate was continuously stirred for about 3 h, and then adding deacetyl group to the m...

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Abstract

The invention discloses a preparation method of a fiber membrane material for heavy metal ion adsorption based on agricultural straw waste. The preparation method comprises the following steps: cutting off and crushing the agricultural straw waste, and pretreating straw fibers with particle sizes in a range of 20-100 meshes to obtain white fiber sponge consisting of a plurality of layers of thin fiber networks; then, with the straw fiber sponge as a base material, modifying the straw fiber sponge with an extracellular polymeric substance (EPS), modified gulcomannan and alginic acid to form a thermal irreversible gel mixture with excellent film forming performance, wherein carbon dioxide generated by a reaction of sodium carbonate and alginic acid can make cavities of the fiber membrane material richer; and finally, carrying out suction filtration, drying and curing to obtain the high-performance fiber membrane material for heavy metal ion adsorption. The high-performance fiber membrane material which has good filtering performance, has high adsorption and removal effects on heavy metal ions, and has the characteristics of renewable biomass, environment friendliness, good responsiveness and the like is prepared in the invention.

Description

technical field [0001] The invention relates to the field of purification and treatment of sewage containing various heavy metals and the field of resource utilization of waste, in particular to a heavy metal ion adsorption fiber membrane based on two kinds of solid waste based on extracellular polymers of agricultural straw waste and activated sludge waste The method of preparation of the material. Background technique [0002] In recent years, the research and engineering application of polymer materials has gradually shifted to functional fiber composite materials. These composite materials mainly include composite materials such as carbon fiber, aramid fiber and glass fiber, and have been widely used in aerospace, transportation, construction, environmental protection and other fields. However, these types of composite materials have some serious disadvantages, such as the recycling problem of this material, the post-processing problem and the sustainable development pr...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/262B01J20/24B01J20/22B01J20/28038C02F1/286B01J2220/4825C02F2101/20
Inventor 李森徐乃姣
Owner GUIZHOU NORMAL UNIVERSITY
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