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Nanometer zero-valent iron loaded fiber and preparation method and application thereof

A nano-zero valent iron and fiber technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of limited application, difficult separation, secondary pollution of water bodies, etc. Effects of surface area reduction, strong adsorption and reduction

Inactive Publication Date: 2018-09-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small particle size of nano-zero-valent iron, it is difficult to separate after adsorption, and it is easy to cause secondary pollution of water bodies, which limits its application in industry.

Method used

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  • Nanometer zero-valent iron loaded fiber and preparation method and application thereof
  • Nanometer zero-valent iron loaded fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: nanometer zero valent iron loaded fiber

[0028] Under the effect of nitrogen protection, the slurry with a beating degree of 10 ° SR and the ferrous sulfate solution with a molar concentration of 0.2mol / L are 1:20g / ml according to the dry mass volume ratio of the slurry to the ferrous sulfate solution Mix and react on a magnetic stirrer at a temperature of 30°C and a stirring speed of 400r / min for 2h. After the reaction was complete, an excess of sodium borohydride solution with a molar concentration of 0.2 mol / L was added to the Erlenmeyer flask at a speed of 3 ml / min, and the stirring reaction was continued for 1 h at the same temperature at a speed of 700 r / min. After the reaction is complete, the pulp is washed with distilled water, filtered and then freeze-dried to obtain the desired nanometer zero-valent iron-loaded fiber.

[0029] figure 1 It is a scanning electron micrograph of the nanometer zero-valent iron-loaded fiber prepared in Example 1. ...

Embodiment 2

[0031] Embodiment 2: nanometer zero valent iron loaded fiber

[0032] Under the effect of nitrogen protection, the ferrous sulfate solution whose beating degree is 20 ° SR and the molar concentration is 0.4mol / L is 1:40g / ml according to the absolute dry mass volume ratio of the slurry and ferrous sulfate solution Mix and react on a magnetic stirrer at a temperature of 35°C and a stirring speed of 500r / min for 3h. After the reaction was complete, an excess of sodium borohydride solution with a molar concentration of 0.3 mol / L was added to the Erlenmeyer flask at a rate of 5 ml / min, and the stirring reaction was continued for 1.5 h at the same temperature at a rate of 800 r / min. After the reaction is complete, the pulp is washed with distilled water, filtered and then freeze-dried to obtain the desired nanometer zero-valent iron-loaded fiber.

[0033] It can be seen from the scanning electron microscope image and Mapping image of the nano-zero-valent iron-loaded fiber prepared ...

Embodiment 3

[0034] Embodiment 3: nanometer zero valent iron loaded fiber

[0035] Under the effect of nitrogen protection, the slurry with a beating degree of 30 ° SR and the ferrous sulfate solution with a molar concentration of 0.6mol / L are 1:60g / ml according to the dry mass volume ratio of the slurry and the ferrous sulfate solution Mix and react on a magnetic stirrer at a temperature of 40°C and a stirring speed of 600r / min for 3h. After the reaction was complete, an excess of sodium borohydride solution with a molar concentration of 0.4 mol / L was added to the Erlenmeyer flask at a speed of 7 ml / min, and the stirring reaction was continued for 2 h at the same temperature at a speed of 800 r / min. After the reaction is complete, the pulp is washed with distilled water, filtered and then freeze-dried to obtain the desired nanometer zero-valent iron-loaded fiber.

[0036] It can be seen from the scanning electron microscope image and Mapping image of the nano-zero-valent iron-loaded fibe...

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Abstract

The invention relates to nanometer zero-valent iron loaded fiber and a preparation method and application thereof. The preparation method comprises the following steps: under the protection of inert gas, mixing a pulp with the beating degree of 10-50 degree SR and a ferrous sulfate solution in proportion, and stirring for reaction; adding an excess sodium borohydride solution into the completely reacted pulp, and continuing to stirring for the reaction; washing the completely reacted pulp by using water, filtering and then lyophilizing to obtain the nanometer zero-valent iron loaded fiber. Byan in-situ reduction method, firstly divalent iron ions are mixed with the pulp to penetrate the divalent iron ions into a cell cavity of the fiber, and then the divalent iron ions in the cell cavityare reduced by sodium borohydride to obtain a zero-valent iron precipitate. Relatively strong adsorbing and reducing effects of nanometer zero-valent iron in wastewater treatment process can be played, the problem that the powdered nanometer zero-valent iron is difficult to recycle after wastewater treatment can be solved, and the problem of reduction in reductibility caused by reduction in the specific surface area of the nanometer zero-valent iron due to agglomeration can be alleviated.

Description

technical field [0001] The invention belongs to the technical field of fiber material preparation, and in particular relates to a nanometer zero-valent iron-loaded fiber and a preparation method and application thereof. Background technique [0002] As a functional material, paper is widely used in food, industry, construction and other fields in addition to printing, packaging, writing and household paper. Among them, the adsorption filter paper is a fluid filter medium, which has the function of removing and separating impurities in the fluid, and is widely used in the field of industrial production. And with the progress of society, the dye and heavy metal wastewater discharged from factories will continue to increase. If the wastewater is directly discharged into the environment without treatment, it will pose a threat to the drinking water source on which human beings depend. Therefore, adsorption filter paper has great development prospects in industrial applications....

Claims

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Application Information

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IPC IPC(8): B01J20/24C02F1/28C02F1/70B01J20/30
CPCB01J20/02B01J20/24B01J2220/4831C02F1/288C02F1/705
Inventor 杨飞李艳丽冯郁成汤吕桥何伟健
Owner SOUTH CHINA UNIV OF TECH
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