Method for preparing heavy metal ion adsorbents in ramie oxidization degumming procedures

A heavy metal ion, oxidative degumming technology, applied in other chemical processes, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of poor thermal stability, non-reusability, high price, etc. Application prospects, the effect of low equipment requirements

Inactive Publication Date: 2017-03-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional heavy metal ion adsorbents are mainly activated carbon adsorbents and ion exchange resin adsorbents, but there are disadvantages such as expensive, poor thermal stability, and non-reusable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of method for preparing heavy metal ion adsorbent in ramie oxidation degumming process is as follows:

[0028] The raw ramie is crushed into short fibers with a fineness of 40 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.10g, and its fiber dry weight is calculated according to the moisture regain to be 19.16g. Add deionized water so that the mass concentration of raw hemp cellulose is 6%, soak for 48 hours, and make it fully wet.

[0029]Add 0.4g of sodium percarbonate, 0.1g of resorcinol, 0.1g of 4-methylmorpholine-N-oxide, 0.1g of polyvinyl alcohol, 0.1g of aminotrimethylene phosphonic acid, and add 199.2g of water to form a degumming solution ; The ramie raw hemp short fiber and the degumming reaction solution are mixed in a mass ratio of 1:10, and a 1000mL brown Erlenmeyer flask is used as a reactor. The pH val...

Embodiment 2

[0034] A kind of method for preparing heavy metal ion adsorbent in ramie oxidation degumming process is as follows:

[0035] The raw ramie is crushed into short fibers with a fineness of 100 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.0%. The weighed short fiber quality is 21.35g, and its fiber dry weight is calculated according to the moisture regain to be 19.43g. Add deionized water to make the mass concentration of raw hemp cellulose 10%, soak for 12 hours, and make it fully wet.

[0036] 1.5g of sodium hypochlorite, 0.6g of sodium benzoate, 0.3g of urea, 0.2g of Pingpingjia, 0.2g of sodium polyacrylate, and 197.2g of water are added to make a degumming solution; the raw ramie short fiber and the degumming reaction solution are in a mass ratio of 1: 10 mixed, with a 1000mL brown Erlenmeyer flask as a reactor. The pH value of the degumming solution was adjusted to 11...

Embodiment 3

[0041] A kind of method for preparing heavy metal ion adsorbent in ramie oxidation degumming process is as follows:

[0042] The raw ramie is crushed into short fibers with a fineness of 20 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.20g, and its fiber dry weight is calculated according to the moisture regain to be 19.25g. Add deionized water to make the mass concentration of raw hemp cellulose at 1%, and soak for 24 hours to make it fully wet.

[0043] Potassium periodate 1g, sodium benzoate 0.5g, urea 0.4g, sodium dodecylsulfonate 0.3g, sodium polyacrylate 0.3g, add 197.5g water to make degumming solution; ramie raw hemp short fiber and degumming reaction The liquid was mixed at a mass ratio of 1:10, and a 1000mL brown Erlenmeyer flask was used as a reactor. The pH value of the degumming solution was adjusted to 10.0 with 0.1...

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Abstract

The invention provides a method for preparing heavy metal ion adsorbents in ramie oxidization degumming procedures. The method includes smashing raw ramie to obtain short fibers, adding the short fibers into deionized water and soaking the short fibers; mixing the raw ramie and degumming solution with each other to obtain mixtures, heating the mixtures, sufficiently removing colloid in the raw ramie by the aid of oxidizing agents, and simultaneously oxidizing celluloses with active hydroxyl into oxidized celluloses with aldehyde; soaking reacted fibers in organic solvent aqueous solution and removing the unreacted oxidizing agents; separating the oxidized celluloses from water and drying the oxidized celluloses to obtain powdery oxidized cellulose adsorbents; preparing heavy metal solution, adding the oxidized cellulose absorbents into the heavy metal solution, carrying out vibration adsorption at the room temperature and measuring heavy metal ion absorption capacity numerical values. The method has the advantages that the adsorbents prepared by the aid of the method are low in residual gum content, moderate in crystallinity degree and polymerization degree and high in aldehyde content, and excellent heavy metal ion adsorption effects can be realized; working procedures are simplified, the total reaction time can be shortened, medicines and the cost can be saved, and the efficiency can be greatly improved.

Description

technical field [0001] The invention relates to a method for preparing a heavy metal ion adsorbent in the oxidative degumming process of ramie, and belongs to the technical field of natural fiber preparation and cellulose adsorbent application in the textile field. Background technique [0002] With the rapid development of modern industry, the problem of environmental pollution is becoming more and more serious. Among them, there are a large number of heavy metal ions in the sewage discharged from mineral processing and mining, non-ferrous metal smelting, pesticides and medicines, electrolytic plating, paint pigments, medical care and residents' lives. The surrounding environment is seriously polluted, which poses a serious threat to human, animal and plant health. Heavy metal ions such as Hg(II), As(III), Pb(II), Cd(II), Cr(III), Ni(II), Sn(II) can be continuously enriched in organisms, through the food chain structure sequence, Ultimately, they will cause serious harm to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28D01C1/00C02F101/20
CPCB01J20/24C02F1/286C02F2101/20D01C1/00
Inventor 李召岭丁彬俞建勇武晓会
Owner DONGHUA UNIV
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