Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method of chitosan/cellulose acetate/iron composite adsorbent used for removing antimony

A technology of cellulose acetate and composite adsorption, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor mass transfer rate of low-concentration antimony, poor stability of chitosan, Small specific surface area and other problems to achieve the effect of solving large head loss, strong adsorption activity, and increasing specific surface area

Active Publication Date: 2017-08-15
SUZHOU UNIV OF SCI & TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of preparation method of the sorbent used for adsorbing and removing antimony, this sorbent is compounded by chitosan, cellulose acetate and iron oxide, its By preparing a cellulose acetate skeleton with a porous structure, the rich functional groups of chitosan are used as functional groups, and iron oxides are used as active components of the adsorbent, thereby solving the problem of large water head loss and difficult separation when iron oxides are directly adsorbed , low concentration of antimony, poor mass transfer rate, poor stability of chitosan, small specific surface area, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of chitosan/cellulose acetate/iron composite adsorbent used for removing antimony
  • Preparation method of chitosan/cellulose acetate/iron composite adsorbent used for removing antimony
  • Preparation method of chitosan/cellulose acetate/iron composite adsorbent used for removing antimony

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The invention provides a kind of preparation method of the chitosan / cellulose acetate / iron composite adsorbent that is used for removing antimony, it comprises the following steps:

[0055] Step 1, dissolving chitosan and cellulose acetate in formic acid solution, fully dissolving to obtain chitosan / cellulose acetate formic acid solution, the mass fraction of the chitosan is 0.5%~10%, the cellulose acetate The mass fraction is 5% to 15%;

[0056] Step 2, dissolving the ferric salt in the chitosan / cellulose acetate formic acid solution prepared in step 1, fully stirring to make it evenly mixed, the mass fraction of the ferric salt is 0.03% to 8%, statically home defoaming;

[0057] Step 3, preparing a sodium hydroxide solution with a mass fraction of 4% to 25%, and maintaining a continuous and slow stirring state;

[0058] Step 4, drop the solution prepared in step 2 into the sodium hydroxide solution described in step 3 with a syringe, continue to stir for 24 hours af...

Embodiment 1

[0062] A preparation method for chitosan / cellulose acetate / iron composite adsorbent for antimony removal, comprising the following steps:

[0063] Step 1, dissolve 3g chitosan and 12g cellulose acetate in 100mL formic acid solution, fully dissolve to obtain chitosan / cellulose acetate formic acid solution, the mass fraction of chitosan is 2%, the content of cellulose acetate is 8.7%;

[0064] Step 2, 0.5g ferric chloride hexahydrate is dissolved in the chitosan / cellulose acetate formic acid solution that step 1 makes, fully stirs and it is mixed evenly, the massfraction of ferric chloride hexahydrate is 0.36%, Static defoaming;

[0065] Step 3, prepare sodium hydroxide solution, the mass fraction is 16%, and maintain a continuous and slow stirring state;

[0066] Step 4, drop the solution prepared in step 2 into the sodium hydroxide solution described in step 3 with a syringe, continue to stir for 24 hours after all the solutions are dripped, solidify in the lye to form partic...

Embodiment 2

[0071] A preparation method for chitosan / cellulose acetate / iron composite adsorbent for antimony removal, comprising the following steps:

[0072] Step 1, 3g chitosan and 12g cellulose acetate are dissolved in 100mL formic acid solution, fully dissolve to obtain chitosan / cellulose acetate formic acid solution, the massfraction of chitosan is 2%, the massfraction of cellulose acetate is 8.7%;

[0073] Step 2, dissolving 1g of ferric salt in the formic acid solution of chitosan / cellulose acetate prepared in step 1, fully stirring to make it evenly mixed, the mass fraction of iron is 0.7%, and standing for defoaming;

[0074] Step 3, prepare sodium hydroxide solution, the mass fraction is 16%, and maintain a continuous and slow stirring state;

[0075] Step 4, drop the solution prepared in step 2 into the sodium hydroxide solution described in step 3 with a syringe, continue to stir for 24 hours after all the solutions are dripped, solidify in the lye to form particles, and use ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a chitosan / cellulose acetate / iron composite adsorbent used for removing antimony. The adsorbent is prepared through compounding chitosan, cellulose acetate and iron oxide. A cellulose acetate framework with a porous structure is prepared, a functional group rich in chitosan is a functional group, and the iron oxide is adopted as the active component of the adsorbent, so the disadvantages of large water head loss, difficult separation, poor chitosan stability and small specific surface area during direct adsorption of the iron oxide are overcome in the invention.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, in particular to a preparation method of a composite adsorbent for treating antimony in water. Background technique [0002] Antimony is an amphoteric rare metal. China is the country with the highest antimony reserves in the world, supplying about 84% of the global demand. Antimony in the environment mainly comes from antimony mining areas and special geological belts with high antimony content. [0003] Antimony is chronically toxic and carcinogenic to humans and organisms. In natural water or soil, antimony mostly exists in the form of +3-valent and +5-valent oxo-salts, and the toxicity of trivalent antimony is 10 times higher than that of pentavalent antimony. Wastewater and waste residues produced in antimony mining areas, or the burning of antimony-containing fuels, and the use of antimony-containing flame retardants, catalysts, and stabilizers will all cause ant...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/24B01J2220/46B01J2220/4806B01J2220/4825C02F1/281C02F1/286C02F2101/20
Inventor 白仁碧杨晶晶陈慧李志萍
Owner SUZHOU UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com