Persimmon tannin adsorption material and preparation method thereof

The technology of adsorption material and persimmon tannin is applied in the field of persimmon tannin adsorption material and its preparation, which can solve the problems of easy falling off, slow adsorption and desorption speed, slow adsorption speed, etc., and achieves good physical stability, wide application range, The effect of easy desorption

Inactive Publication Date: 2012-07-18
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Adsorption method is a more effective method for treating heavy metal ion wastewater, especially low concentration heavy metal ion wastewater. Commonly used adsorption materials include activated carbon, synthetic resin, minerals, microorganisms and natural biomass, etc.; South China University of Technology Zhang Huiping, Zhu Liguo et al. The adsorption performance of activated carbon fiber and modified activated carbon fiber on heavy metal ions, the results show that: activated carbon fiber on Cu 2+ 、Ni 2+ The saturated adsorption capacity of the modified activated carbon fiber is 5.1mg/g, 6.6mg/g respectively, and the modified activated carbon fiber has a 2+ 、Ni 2+ The saturated adsorption capacity has reached 20.6mg/g, 8.0mg/g, and the adsorption capacity is still relatively small; these adsorption materials still have some shortcomings in industrial applications. First, the adsorption capacity is low. There is adsorption and the adsorption capacity is usually between 5-20mg/g; second, the adsorption and desorption speed is slow. The currently used adsorption materials mainly depen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 60g of persimmon powder and 15g of skin collagen fiber produced according to the invention patent application method with publication number CN101328194 into 1000ml of distilled water, stir and react at 25°C for 20 hours; add 22.5ml of 25% glutaraldehyde aqueous solution for laboratory use , stirred and reacted at 25°C for 1 hour; after the reaction, the pH of the solution was measured with a pH tester to be 5.0; then the pH was adjusted to 6.4 with 1mol / L NaOH aqueous solution, and then the reactant was put into a three-necked flask, and the React in a water bath at 50°C for 3 hours; take it out and vacuum filter it with a circulating water vacuum pump, and dry it in vacuum at 60°C for 12 hours; finally take it out and grind it into fine powder with a pulverizer to obtain 60 g of collagen fiber-cured tannin. After adsorbed Fe 3+ In the test, the concentration after adsorption was measured by spectrophotometry, and the adsorption rate was calculated to be 90.1%, whi...

Embodiment 2

[0023] Add 60g of purchased FD persimmon powder and 40g of skin collagen fibers into 1000ml of distilled water, and stir and react at 25°C for 20 hours; add 60ml of 25% glutaraldehyde aqueous solution for laboratory use and stir for 1 hour at 25°C; the reaction is over Finally, use a pH tester to measure the pH of the solution to be 5; then adjust the pH to 6.4 with 1mol / L NaOH aqueous solution, then put the reactant into a three-necked flask, and react in a water bath at 50°C for 3 hours; take it out with circulating water Type vacuum pump vacuum filtration, vacuum drying at 60 ° C for 12 hours; finally take out and pulverize into fine powder with a pulverizer to obtain 79 g of collagen fiber solidified tannin. Cu 2+ In the test, the concentration after adsorption was measured by spectrophotometry, and the adsorption rate was calculated to be 91.65%.

Embodiment 3

[0025] Add 60g of purchased FD persimmon powder and 40g of skin collagen fibers into 1000ml of distilled water, and stir and react at 25°C for 20 hours; add 60ml of 25% glutaraldehyde aqueous solution for laboratory use and stir for 1 hour at 25°C; the reaction is over Finally, use a pH tester to measure the pH of the solution to be 5; then adjust the pH to 6.4 with 1mol / L NaOH aqueous solution, then put the reactant into a three-necked flask, and react in a water bath at 50°C for 3 hours; take it out with circulating water Type vacuum pump vacuum filtration, vacuum drying at 60 ° C for 12 hours; finally take out and pulverize into fine powder with a pulverizer to obtain 79 g of collagen fiber solidified tannin. Adsorbed Ag + In the test, the concentration after adsorption was measured by spectrophotometry, and the adsorption rate was calculated to be 95.2%.

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Abstract

The invention discloses a persimmon tannin adsorption material and a preparation method of the persimmon tannin adsorption material. The preparation method comprises the steps of: adding 2-5 parts of cattle-hide collagen fiber and 5-8 parts of persimmon powder which are treated into 100 parts of deionized water to be mixed and dissolved, and stirring for 10-20h at the normal temperature; adding 3-8 parts of cross-linking agent into the mixed solution, adjusting the pH value of the mixed solution to 6.0-6.6 by NaOH or HCl water solution, and carrying out reaction for 1-3 hours at the normal temperature; leading reactant to carry out water bath reaction for 3-5h at the temperature of 50-60 DEG C; taking out products of the reaction and filtering, carrying out vacuum drying at the temperature of 60 DEG C; and after drying, grinding the products into fine powder by a grinding machine to obtain the cattle-hide collagen fiber-cured persimmon tannin adsorption material. The persimmon tannin adsorption material is good in physical stability, remarkable in adsorption effect, low in cost and free from secondary pollution for the environment, and can be used in a circulating way; the persimmon tannin adsorption material is used for carrying out adsorption recovery test on noble metals such as Cu, Cr, Fe, Ag and the like, and the average adsorption rate reaches more than 95%, so that better adsorption effect can be achieved; and the persimmon tannin adsorption material disclosed by the invention is suitable for adsorbing, separating and recovering the heavy metal ions in industrial waste water with low concentration.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a persimmon tannin adsorption material and a preparation method thereof. Background technique [0002] At present, there are three main methods for treating heavy metal-containing wastewater and waste residue at home and abroad: one is chemical precipitation, the other is biological treatment, and the third is adsorption. Adsorption method is a more effective method for treating heavy metal ion wastewater, especially low concentration heavy metal ion wastewater. Commonly used adsorption materials include activated carbon, synthetic resin, minerals, microorganisms and natural biomass, etc.; South China University of Technology Zhang Huiping, Zhu Liguo et al. The adsorption performance of activated carbon fiber and modified activated carbon fiber on heavy metal ions, the results show that: activated carbon fiber on Cu 2+ 、Ni 2+ The saturated adsorption capacity of the ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 王仲民崔健戴培邦周治德周怀营李桂银
Owner GUILIN UNIV OF ELECTRONIC TECH
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