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Preparation method of collagen fiber-immobilized tannin-loaded nano-zero-valent Fe-ni bimetallic spheres for adsorption and reduction

A collagen fiber and nano-zero-valent technology, which is applied in the field of reuse of waste biomass resources, can solve the problems affecting the application of NZVI repair, the instability of nano-zero-valent iron, and the tendency to agglomerate, so as to achieve improved electron transfer performance and low cost , Excellent dispersion effect

Active Publication Date: 2022-01-28
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the preparation method of nano-zero-valent iron (NZVI), due to the weak van der Waals force, high surface energy and inherent magnetic interaction between NZVI particles, the conventionally synthesized nano-zero-valent iron is extremely unstable, and it is easy to occur during the application process. Agglomeration, which seriously affects the remediation application of NZVI in the desorption and reduction of radioactive wastewater

Method used

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  • Preparation method of collagen fiber-immobilized tannin-loaded nano-zero-valent Fe-ni bimetallic spheres for adsorption and reduction
  • Preparation method of collagen fiber-immobilized tannin-loaded nano-zero-valent Fe-ni bimetallic spheres for adsorption and reduction
  • Preparation method of collagen fiber-immobilized tannin-loaded nano-zero-valent Fe-ni bimetallic spheres for adsorption and reduction

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Effect test

Embodiment 1

[0031] A preparation method for collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic sphere adsorption reduction material, comprising the following steps:

[0032] Step 1. After soaking 5g of collagen fibers in 100mL of ultrapure water overnight, add 3g of bayberry tannin, stir for 2 hours, filter, disperse the filtered solid in 100mL of glutaraldehyde solution, adjust the pH to 6.0-6.5, and the temperature is 45 Cross-link for 6 hours at ℃, filter and wash off unreacted glutaraldehyde, and dry at 60℃ for 24 hours to obtain collagen fiber-cured tannin material; the volume concentration of glutaraldehyde solution is 2%;

[0033] Step 2: Disperse 1 g of collagen fiber solidified tannin material in 100 mL of ultrapure water, then add 27 mL of ferric chloride solution with a concentration of 1 g / L, adjust the pH to 2.0, and stir and react at 25 ° C for 4 hours to obtain a mixed solution , add 27mL of nickel chloride solution with a concentration of 1g / L ...

Embodiment 2

[0036] A preparation method for collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic sphere adsorption reduction material, comprising the following steps:

[0037]Step 1. After soaking 5g of collagen fibers in 100mL of ultrapure water overnight, add 5g of bayberry tannin, stir for 2 hours, filter, disperse the filtered solid in 100mL of glutaraldehyde solution, adjust the pH to 6.0-6.5, and the temperature is 45 Cross-link for 6 hours at ℃, filter and wash off unreacted glutaraldehyde, and dry at 60℃ for 24 hours to obtain collagen fiber-cured tannin material; the volume concentration of glutaraldehyde solution is 3%;

[0038] Step 2: Disperse 1 g of collagen fiber solidified tannin material in 100 mL of ultrapure water, then add 25 mL of ferric nitrate solution with a concentration of 1 g / L, adjust the pH to 2.0, and stir and react at 25°C for 4 hours to obtain a mixed solution. Add 25mL of nickel nitrate solution with a concentration of 1g / L into t...

Embodiment 3

[0041] A preparation method for collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic sphere adsorption reduction material, comprising the following steps:

[0042] Step 1. After soaking 5g of collagen fibers in 100mL of ultrapure water overnight, add 3g of bayberry tannin, stir for 2 hours, filter, disperse the filtered solid in 100mL of glutaraldehyde solution, adjust the pH to 6.0-6.5, and the temperature is 45 Cross-link for 6 hours at ℃, filter and wash off unreacted glutaraldehyde, and dry at 60℃ for 24 hours to obtain collagen fiber-cured tannin material; the volume concentration of glutaraldehyde solution is 3%;

[0043] Step 2: Take 1g of collagen fiber solidified tannin material and disperse it in 100mL of ultrapure water, then add 25mL of ferrous chloride solution with a concentration of 1g / L, adjust the pH to 2.0, stir and react at 25°C for 4h, and obtain a mixed solution, add 25mL of nickel nitrate solution with a concentration of 1g / L in...

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Abstract

The invention discloses a method for preparing a collagen fiber immobilized with tannin and loaded with nanometer zero-valent Fe-Ni bimetallic spheres to absorb and reduce the material, comprising: soaking the collagen fiber with ultrapure water overnight, adding tannin, stirring, filtering, Disperse in the crosslinking agent solution, adjust the pH, crosslink, filter, wash, and dry to obtain the collagen fiber solidified tannin material; take the collagen fiber solidified tannin material and disperse it in water, then add Fe 3+ solution or Fe 2+ solution, and adjust the pH, stir the reaction to obtain a mixed solution, Ni 2+ Add the solution into the mixed solution, adjust the pH, continue to react, filter and wash; redisperse the obtained material in the reducing agent solution, reduce at room temperature, filter, wash, dehydrate repeatedly with ethanol, and dry in vacuum to obtain collagen fiber immobilized tannin Loaded with nanometer zero-valent Fe-Ni bimetallic spheres to adsorb and reduce materials; this material can be applied to the adsorption and separation of various heavy metals, and has an ultra-high adsorption capacity for certain metal ions.

Description

technical field [0001] The invention belongs to the reuse of biomass waste resources, and relates to the adsorption and reduction treatment of waste water containing heavy metals, in particular to a method for preparing an adsorption and reduction material of collagen fibers immobilized with tannin and loaded with nanometer zero-valent Fe-Ni bimetallic balls. Background technique [0002] In the preparation method of nano-zero-valent iron (NZVI), due to the weak van der Waals force, high surface energy and inherent magnetic interaction between NZVI particles, the conventionally synthesized nano-zero-valent iron is extremely unstable, and it is easy to occur during the application process. Agglomeration, which seriously affects the remediation application of NZVI in the desorption and reduction of radioactive wastewater. At the same time, as the oxidation reaction time of NZVI prolongs, more and more corrosion products of ferrous iron or ferric iron will be generated on the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/22B01J20/0229B01J20/0225C02F1/288C02F2101/20
Inventor 周建廖卉
Owner SOUTHWEAT UNIV OF SCI & TECH