Modified coco coir loaded nano zero-valent iron composite material as well as preparation method and application thereof

A technology of nano-zero-valent iron and composite materials, applied in chemical instruments and methods, radioactive pollutants, adsorbed water/sewage treatment, etc., can solve the problems of easy aggregation of nano-zero-valent iron, high cost of sewage treatment, secondary environmental hazards, etc. problem, to achieve the effect of preventing agglomeration, easy commercial promotion, and expansion of removal rate

Inactive Publication Date: 2020-07-24
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems existing in the prior art, the present invention aims to provide a preparation method of modified coconut bran loaded nano-zero-valent iron composite material, and apply it to the treatment of waste water with low content of radionuclide U (Ⅵ) , in order to solve the technical problems caused by the characteristics of nano zero-valent iron, such as easy aggregation, easy oxidation, high cost of sewage treatment, easy to cause secondary environmental hazards, etc.

Method used

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  • Modified coco coir loaded nano zero-valent iron composite material as well as preparation method and application thereof
  • Modified coco coir loaded nano zero-valent iron composite material as well as preparation method and application thereof
  • Modified coco coir loaded nano zero-valent iron composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of a modified coconut bran-loaded nano-zero-valent iron composite material, comprising the following steps:

[0044] 1) Select coconut shell, wash with water, and use crushing machinery to crush coconut shell to coconut bran with particle diameter of 0.5mm;

[0045] 2) spread out the coconut bran, dry it at room temperature for 24 hours, with a moisture content of 15%, then put it into a microwave expansion furnace, adjust the power to be 1000W, and expand for 2 minutes;

[0046] 3) get coconut bran 3.02g, add the FeSO of 10L 1.5g / L 4 In the solution, add 2 L of ethanol and 10 g of gelatin, and stir for 2 hours;

[0047] 4) Add 10L of 1.2g / L NaBH 4 solution, stir rapidly for 15 seconds, filter;

[0048] 5) Wash three times with deionized water and absolute ethanol respectively, put into a vacuum drying oven for vacuum drying, the drying temperature is 40 ° C, and the drying time is 0.5 hour, to obtain the modified coconut bran-loaded nano-zero-va...

Embodiment 2

[0050] A preparation method of a modified coconut bran-loaded nano-zero-valent iron composite material, comprising the following steps:

[0051] 1) Select coconut shell, wash with water, and crush the coconut shell to coconut bran with a particle size of 1.0mm using a crushing machine;

[0052] 2) spread out the coconut bran, dry it at room temperature for 12 hours, the moisture is 20%, then put it into a microwave expansion furnace, adjust the power to be 1200W, and expand for 2.5 minutes;

[0053] 3) get coconut bran 5.06g, add the FeSO of 10L 2.0g / L 4 In the solution, add 2.5L of ethanol and 20g of gelatin, and stir for 3 hours;

[0054] 4) Add 10L of 1.5g / L NaBH 4 solution, stir rapidly for 15 seconds, filter;

[0055] 5) Wash three times with deionized water and absolute ethanol respectively, put into a vacuum drying box for vacuum drying, the drying temperature is 40°C, and the drying time is 1 hour.

Embodiment 3

[0057] A preparation method of a modified coconut bran-loaded nano-zero-valent iron composite material, comprising the following steps:

[0058] 1) Select coconut shell, wash with water, and use crushing machinery to crush coconut shell to coconut bran with a particle size of 2.0mm;

[0059] 2) spread out the coconut bran, dry it at room temperature for 6 hours, with a moisture content of 30%, then put it into a microwave expansion furnace, adjust the power to be 1500W, and expand for 3 minutes;

[0060] 3) get coconut bran 7.82g, add the FeSO of 10L 2.3g / L 4 In the solution, add 3L of ethanol and 30g of gelatin, and stir for 3.5 hours;

[0061] 4) Add 10L of 1.8g / L NaBH 4 solution, stir rapidly for 15 seconds, filter;

[0062] 5) Wash three times with deionized water and absolute ethanol respectively, put into a vacuum drying box for vacuum drying, the drying temperature is 40°C, and the drying time is 1 hour.

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Abstract

The invention provides a modified coco coir loaded nano zero-valent iron composite material. Modified coco coir is used as a loading base material; nano zero-valent iron is embedded in pores of the modified coco coir, gelatin colloid wraps the nano zero-valent iron, and a preparation method comprises the following steps: 1) selecting coconut shells, cleaning the coconut shells with water, and crushing the coconut shells into particles with a certain particle size by adopting a crushing machine; 2) drying the obtained coco coir, and putting the coco coir into a microwave expansion furnace for puffing treatment to obtain puffed coco coir; 3) adding a FeSO4 solution according to a certain weight ratio, adding an organic solvent and a dispersing agent, and uniformly stirring; 4) adding a certain amount of NaBH4 into the solution obtained in the step 3), quickly stirring, and filtering; 5) washing the obtained composite material with deionized water and an organic solvent respectively, andthen putting the composite material into a vacuum drying oven for drying to obtain the composite material. The coco coir used in the method is wide in source, and the method is easy and convenient tooperate, low in cost, capable of effectively treating low-concentration uranium-containing wastewater and suitable for large-scale production, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of nano-composite materials, in particular to a modified coconut bran-loaded nano-zero-valent iron composite material, a preparation method and an application thereof. Background technique [0002] Coconut is a tropical fruit that is widely found in tropical rural areas and is more common in Hainan, my country. Coconut husks are a by-product of the coconut production process and are more commonly found on coconut growing farms and in the coconut processing market. Coconut peat is a pure natural organic medium stripped from the coconut shell fiber processing process. It has large porosity, small bulk density and good air permeability. It is often used in flower planting and garden cultivation. [0003] Nano-zero-valent iron is a new type of environmentally friendly material, which has the advantages of small particle size, large surface area, strong reducing ability, and fast reaction speed, and is often used in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F1/28
CPCC02F1/70C02F1/286C02F2101/006
Inventor 易正戟刘剑曾荣英龙九妹
Owner HENGYANG NORMAL UNIV
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