Preparation method of collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material

A technology of collagen fibers and nano-zero valence, which is applied in the field of reuse of waste biomass resources, can solve problems such as weak van der Waals force, instability of nano-zero valent iron, and affecting NZVI repair application, etc., and achieves the effect of ultra-high adsorption capacity

Active Publication Date: 2019-11-22
SOUTHWEAT UNIV OF SCI & TECH
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  • 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 nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material
  • Preparation method of collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material
  • Preparation method of collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material

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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 preparation method of a collagen fiber immobilized tannin loaded nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material, which comprises the following steps: adding ultrapure water into collagen fibers, soaking overnight, adding tannin, stirring, filtering, dispersing in a crosslinking agent solution, regulating the pH value, crosslinking, filtering, washing, and drying to obtain a collagen fiber cured tannin material; dispersing the collagen fiber cured tannin material in water, adding a Fe < 3 + > solution or a Fe < 2 + > solution, adjusting the pH value, stirring and reacting to obtain a mixed solution, adding a Ni < 2 + > solution into the mixed solution, adjusting the pH value, continuously reacting, filtering and washing; re-dispersing theobtained material in a reducing agent solution, reducing at normal temperature, filtering, washing, repeatedly dehydrating with ethanol, and drying in vacuum to obtain the collagen fiber immobilizedtannin loaded nanometer zero-valent Fe-Ni bimetallic ball adsorption reduction material; the material can be applied to adsorption and separation of various heavy metals, and has ultrahigh adsorptioncapacity 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 Applications(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
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