Method for green synthesis of nanometer zero-valent iron suspension liquid with peels or seed kernels

A nano-zero-valent iron, green synthesis technology, applied in nanotechnology, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as toxic chemical reagents, achieve good biodegradability, good application value, Fast removal effect

Inactive Publication Date: 2016-07-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the raw materials used in the existing zero-valent iron preparation method are toxic chemical reagents, the present invention provides a non-toxic, harmless and biodegradable nano-zero-valent iron preparation method

Method used

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  • Method for green synthesis of nanometer zero-valent iron suspension liquid with peels or seed kernels
  • Method for green synthesis of nanometer zero-valent iron suspension liquid with peels or seed kernels
  • Method for green synthesis of nanometer zero-valent iron suspension liquid with peels or seed kernels

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Embodiment 1

[0020] A method for synthesizing nano zero-valent iron suspension with peel or kernel green, comprising the steps:

[0021] (1) Extraction of total phenols: Dry the grape seeds in a blast drying oven at 80°C for 8 hours, grind them into powder with a pulverizer, weigh 4g of grape seed powder and add it to the colorimetric tube, and add it to the colorimetric tube Add a 60% ethanol solution with a solid-liquid ratio of 1:15, pass nitrogen gas with a purity of 99.9% for 5 minutes, plug the cap of the colorimetric tube tightly to prevent air from entering, heat it in a water bath at 80°C, and use a centrifuge at 13000r Centrifuge the total phenol extract at a speed of 1 / min, take the supernatant as a reducing agent for preparing zero-valent iron, measure the content of total phenol in the supernatant by Folin-Ciocalteu colorimetry, and take the total phenol in the supernatant The concentration was diluted to 0.2mg / mL.

[0022] (2) Preparation of ferric chloride solution: Weigh 1...

Embodiment 2

[0026] A method for synthesizing nano zero-valent iron suspension with peel or kernel green, comprising the steps:

[0027] (1) Extraction of total phenols: Dry the mango peel in a blast drying oven at 90°C for 8 hours, grind it into powder with a pulverizer, weigh 4g of mango peel powder and add it to the colorimetric tube, and add it to the colorimetric tube Add a 60% ethanol solution with a ratio of solid to liquid of 1:20, pass nitrogen gas with a purity of 99.9% for 5 minutes, plug the cap of the colorimetric tube tightly to prevent air from entering, heat it in a water bath at 90°C, and use a centrifuge at 14000r Centrifuge the total phenol extract at a speed of 1 / min, take the supernatant as a reducing agent for preparing zero-valent iron, measure the content of total phenol in the supernatant by Folin-Ciocalteu colorimetry, and take the total phenol in the supernatant The concentration was diluted to 0.2mg / mL.

[0028] (2) Preparation of ferric chloride solution: Weig...

Embodiment 3

[0032] A method for synthesizing nano zero-valent iron suspension with peel or kernel green, comprising the steps:

[0033] (1) Extraction of total phenols: dry pomegranate peels in a blast drying oven at 80°C for 9 hours, grind them into powder with a pulverizer, weigh 4g of pomegranate peels powder and add them to a colorimetric tube. Add 60% ethanol solution with a solid-liquid ratio of 1:20 to the colorimetric tube, pass nitrogen gas with a purity of 99.9% for 5 minutes, plug the cap of the colorimetric tube tightly to prevent air from entering, heat in a water bath at 90°C, and use The centrifuge centrifuges the total phenol extract at a speed of 15000r / min, takes the supernatant as a reducing agent for preparing zero-valent iron, measures the content of total phenol in the supernatant by Folin-Ciocalteu colorimetry, and takes the supernatant The concentration of total phenols in the solution was diluted to 0.2mg / mL.

[0034] (2) Preparation of ferric chloride solution: ...

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Abstract

The invention discloses a method for green synthesis of nanometer zero-valent iron suspension liquid with peels or seed kernels. Ferric ions are reduced with plant total phenols in peels or seed kernels as a reducing agent to generate the nanometer zero-valent iron suspension liquid. The method for preparing the nanometer zero-valent iron suspension liquid from total phenols comprises the steps of extracting plant total phenols from waste peels or seed kernels, introducing nitrogen to remove dissolved oxygen in total phenol solution and ferric ion solution, and ferric ions are reduced by means of the reductibility of total phenols to generate zero-valent iron. The obtained zero-valent iron suspension liquid has high dispersity and reaction activity. The preparing method is easy to operate, the synthesized material is environment-friendly, low in cost and high in effectiveness, and equipment is simple. The zero-valent iron suspension liquid is used for removing hexavalent chromium in water, the rate of removing hexavalent chromium of 20 mg / L is 93-98%, removing speed is high, removing rate is high, secondary pollution to polluted water is avoided, and the zero-valent iron suspension liquid has broad application prospects in remediation of water polluted by hexavalent chromium.

Description

technical field [0001] The invention relates to a preparation method of nanometer zero-valent iron, in particular to a method for reductively synthesizing nanometer zero-valent iron by using the total phenolic substances in discarded peels and fruit kernels, which belongs to the new field of preparation of nanomaterials and environmental pollution control field of materials technology. Background technique [0002] Nano zero-valent iron (nZVI) has a large specific surface area, which makes it have high surface energy and surface binding energy, which can improve the reactivity and processing efficiency of zero-valent iron particles, and is easy to combine with other atoms, so it is widely used Removal of pollutants in environmental remediation. [0003] There are many methods for synthesizing nano-zero-valent iron, including chemical vapor deposition, inert gas condensation, pulsed laser ablation, spark discharge generation, sputtering gas-aggregation, pyrolysis, oxide ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00C02F1/62
CPCB82Y40/00C02F1/62B22F9/24C02F2101/22B22F1/0545
Inventor 岳秀萍张潇郭波李美玲陈娜
Owner TAIYUAN UNIV OF TECH
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