Collagen fiber solidified tannin adsorptive material and its preparation method and its adsorption and separation of metallic ion

A collagen fiber and adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of poor strength, low adsorption capacity, low selectivity, etc., and achieve high mechanical strength and heat Effects of stability, high selective adsorption capacity, and wide range of raw material sources

Inactive Publication Date: 2003-04-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of adsorbent materials developed, and the main defects are as follows: first, the adsorption capacity is low, second, the selectivity is not high, and third, the price of the adsorbent materials is relatively high.
If directly using tannin or tannin resin as the adsorption material, there must be a loss of tannin; and the strength of the tannin solidified on the plant fiber as the adsorption material is poor; Adsorbent materials, because collagen fibers and tannins are bound by hydrogen bonds, so there is also the problem of tannin shedding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation method of collagen fiber solidified black wattle bark tannin adsorption material

[0026] 1. Preparation of granular collagen fibers

[0027] Animal skin was selected as raw material, cleaned, alkali treated, skinned, dealkalized, demineralized and buffer treated, dehydrated, dried and ground according to conventional methods to obtain granular collagen fibers with an average particle size of 90 μm.

[0028] 2. Preparation of Collagen Fiber Cured Black Wattle Bark Tannin Adsorbent Material

[0029] Prepare 9g of black wattle bark tannin into a 20-40g / L aqueous solution; weigh 15g of granular collagen fibers and rehydrate with distilled water; add the rehydrated collagen fibers into the black wattle bark tannin solution, Stir the reaction for 24 hours and let it stand for 12 hours; filter and wash off the unreacted tannin with deionized water to obtain the intermediate product A; prepare 1.5% aqueous solution with 6 g of oxazolidine; put A into the...

Embodiment 2

[0030] Example 2 Preparation method of collagen fiber solidified bayberry tannin adsorption membrane material

[0031] 1. Preparation of collagen fiber membrane

[0032] The animal hide is processed according to the method of Example 1, but not ground to obtain the collagen fiber membrane

[0033] 2. Preparation of collagen fiber-cured bayberry tannin adsorption adhesive material:

[0034] Mix 9 g of bayberry tannin into a 25 g / L aqueous solution; weigh 15 g of film-like collagen fibers and rehydrate with distilled water; add the rehydrated collagen fibers into the bayberry tannin solution, stir and react at a temperature of 25°C for 24 hours, and let stand 12 hours; filter, wash off the unreacted tannin with distilled water to obtain intermediate product A; prepare 1.5% solution with 4 g of oxazolidine; put A into the oxazolidine solution, stir and react at a temperature of 60° C. for 4 hours, and statically Place for 12 hours; filter, wash off unreacted oxazolidine with di...

Embodiment 3

[0035] Example 3 Preparation method of collagen fiber solidified black wattle bark tannin adsorption material

[0036] 1. Preparation of granular collagen fibers

[0037] Granular collagen fibers were prepared according to the method of Example 1

[0038] 2. Preparation of collagen fiber solidified black wattle bark tannin adsorption material:

[0039] Mix 6 g of black wattle bark tannin into a 20 g / L aqueous solution; weigh 10 g of collagen fiber and re-moisture it with distilled water; add the re-wetted collagen fiber into the black wattle bark tannin solution, stir and react at 25°C for 24 hour, stand still for 12 hours; filter, wash away the unreacted tannin with distilled water, and obtain intermediate product A; prepare 3% aqueous solution with 6 g of formaldehyde; put A into the formaldehyde solution, stir and react at a temperature of 60 ° C for 6 hours, Stand still for 12 hours; filter, wash off unreacted formaldehyde with distilled water, and dry at 60°C for 12-24 ...

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Abstract

An adsorbing collagen fibre-solidified tannin material for adsorbing and separating metallic ions (Pb, Cd, Hg, Cr and Cu) is prepared from animal skin through preparing collagen fibre membrane or granules, adding the said collagen fibres along with the aqueous solution of tannin to a reactor, reacting at 10-45 deg.c for 6-24 hr, laying aside for 12-24 hr, filtering, washing to remove excessive tannin, adding cross-linking agent, reacting at 20-70 deg.c for 2-8 hr, filtering, washing and drying at 60 deg.c for 12-24 hr. It has very high adsorption selectivity.

Description

1. Technical field [0001] The invention relates to a collagen fiber solidified tannin adsorption material, a preparation method thereof, and the adsorption and separation of metal ions. 2. Background technology [0002] Chemical, metallurgical, petroleum and other production processes will produce a large amount of waste water, and heavy metal ions such as lead, cadmium, and mercury in the waste water will seriously pollute the environment, and have extremely strong toxic and side effects on the human body. Therefore, all countries have formulated strict wastewater discharge standards. At present, the methods for removing heavy metal ions mainly include precipitation, ion exchange and adsorption (Zhang Ping, Cai Shuihong, Luo Zanchun, Zhang Qiuhua, Research on Chitosan Adsorption of Metal Ions "Hydrometallurgy" 1994, 49 (1): 16-20; Liu Lizhong, Yu Shanxin, Xiao Lixin, Adsorption Properties of Polymer Loaded Schiff Bases on Metal Ions, "Ion Exchange and Adsorption", 1995, 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 廖学品石碧
Owner SICHUAN UNIV
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