A kind of adsorption material, preparation method and application of Hangjin soil 2# soil loaded nano-zero valent iron

A technology of nano-zero-valent iron and adsorption materials, which is applied to the application of the above-mentioned adsorption materials. The adsorption material of nano-zero-valent iron loaded with Hangjin 2# soil, the preparation field of the above-mentioned adsorption materials, can solve the problem of zero-valent iron reactivity and Reduced effectiveness, unable to degrade pollutants permanently, reduce the possibility of engineering applications, etc., to achieve the effects of not being easy to particle agglomeration and self-oxidation, good ion exchange capacity and adsorption capacity, and improving resource utilization

Inactive Publication Date: 2018-01-12
BEIJING VOCATIONAL COLLEGE OF AGRI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The large specific surface area and strong magnetism of nano-zero-valent iron make it easy to agglomerate and form large particles in the process of preparation and application, resulting in a decrease in specific surface area and activity, which greatly affects its Value;
[0006] (2) The agglomeration of nano-zero-valent iron particles can also reduce its fluidity in water, making the detergent diffuse unevenly, making it difficult to completely contact with pollutants, reducing the possibility of its practical engineering application;
[0007] (3) The high activity of nano-zero-valent iron also makes it easy to be oxidized by non-target pollutants in the environment (such as water and oxygen), that is, the "spontaneous combustion" of nano-zero-valent iron. Reduced resistance, unable to degrade pollutants in the environment for a long time
[0010] (2) The source of raw materials for partial load is limited and the cost of raw materials is high;
[0012] (4) The adsorption / flocculation performance of the loading material itself is limited, and most of them have no catalytic performance. How to better exert the reduction / adsorption / catalysis synergistic effect of the material and improve its removal rate of pollutants requires further research and development.

Method used

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  • A kind of adsorption material, preparation method and application of Hangjin soil 2# soil loaded nano-zero valent iron

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preparation example Construction

[0037] The preparation method of Hangjin 2# soil-loaded nanometer zero-valent iron is: under the condition of nitrogen atmosphere, with the help of external reducing agent sodium borohydride (NaBH 4 ) reduction, making iron-containing oxides (FeCl 3 ·6H 2O) reduced to nanometer zero-valent iron, and evenly dispersed on the surface of the carrier material Hangjin 2# soil. Including the following steps:

[0038] 1) 1.932g of FeCl 3 ·6H 2 O was dissolved in 50ml ethanol solution (40ml ethanol, 10ml water) to obtain a mixed solution.

[0039] 2) Put the mixed solution in step 1 into a three-necked flask, and add 2.00 g of Hangjin soil that has been simply ground and passed through a 200-mesh sieve. Make the mass ratio of nanometer zero valent iron (NZVI) to Hangjin 2# soil be 1:4-5.

[0040] 3) Pass nitrogen gas into the product of step 2 and magnetically stir for 30 minutes to remove oxygen in the mixture.

[0041] 4) Dissolve 0.708g of reducing agent (such as sodium boroh...

Embodiment 1

[0045] Example 1: Preparation of Hangjin Soil 2# loaded nanometer zero-valent iron

[0046] The contents of the main chemical components of the Hangjin 2# soil used in this example are shown in Table 1.

[0047] 1) 1.932g of FeCl 3 ·6H 2 O was dissolved in 50ml ethanol solution (40ml ethanol, 10ml water) to obtain a mixed solution.

[0048] 2) Put the mixed solution in step 1 into a three-necked flask, and add 2.00 g of Hangjin soil that has been simply ground and passed through a 200-mesh sieve. The mass ratio of nanometer zero valent iron (NZVI) to Hangjin 2# soil is 1:5.

[0049] 3) The product of step 2 was passed through nitrogen and magnetically stirred for 30 minutes to remove the oxygen in the mixture.

[0050] 4) Dissolve 0.708g of sodium borohydride in 100ml of water, and transfer the sodium borohydride solution to a 250ml pear-shaped flask.

[0051] 5) Add the sodium borohydride solution of step 4 to the product of step 3 at a rate of 2-3 drops / second under the...

Embodiment 2

[0054] Example 2: Hangjin clay-loaded nano-zero-valent iron material is applied to the decolorization of methyl orange

[0055] Take 100ml of the newly prepared 50mg / L methyl orange standard solution in a 250ml beaker, add the synthesized composite material NZVI@HJ into the methyl orange solution, the initial concentration of methyl orange is 50mg / L, and the dosage of the composite material is 5g / L, NZVI@Hangjin 2# soil loading ratio is 1:5. Stir continuously, the speed is 250 rpm, take 1ml of samples at 30s, 1min, 2min, 3min, 4min, 5min, 6min, 9min, 12min, 15min, 20min, 25min, 30min, and 40min, add 1ml to a 25ml colorimetric tube, and constant volume , using a UV spectrophotometer to measure its absorbance, compared with the absorbance of the stock solution, to study the effect of the synthesized Hangjin soil loaded with nanometer zero-valent iron on the removal of methyl orange. The experimental results show that the synthesized Hangjin soil loaded with nano-zero-valent iro...

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Abstract

An adsorption material for Hangjin 2# soil loaded with nanometer zero-valent iron, wherein the mass ratio of nanometer zerovalent iron to Hangjin 2# soil is 1:4‑5. The preparation method uses Hangjin 2# soil as the carrier to load nanometer zero-valent iron. The steps are as follows: 1) dissolving iron-containing oxides in ethanol solution to obtain a mixed solution; 2) adding Hangjin 2 to the mixed solution in step 1 #soil, nanometer zero valent iron and Hang Jin 2# soil mass ratio are 1:4-5; 3) pass into nitrogen in the product of step 2, stir and remove oxygen; 4) add reducing agent to the product of step 3, will Iron-containing oxides are reduced to nanometer zero-valent iron, and evenly dispersed on the surface of the carrier material Hangjin 2# soil; 5) The product obtained in step 4 is subjected to solid-liquid separation, and the solid is vacuum-dried to obtain Hangjin soil 2# soil-loaded nanometer zero-valent iron Adsorbent material for iron. The adsorption material of the invention has higher reactivity and reduction effectiveness, and has good application value in actual water pollution control and repair projects.

Description

technical field [0001] The invention belongs to the field of nanometer adsorption materials, and in particular relates to an adsorption material loaded with nanometer zero-valent iron by Hangjin 2# soil. [0002] The present invention also relates to a method for preparing the above-mentioned adsorption material. [0003] The invention also relates to the use of the above-mentioned adsorption materials. Background technique [0004] Since nano-zero-valent iron has the advantages of small particle size, large surface effect, and high reactivity, it is an excellent environmental functional material that can efficiently remove various pollutants in water, such as heavy metal ions, organic pollutants, etc. Therefore, nano The removal of water pollutants by zero-valent iron is a new pollution control technology developed in recent years. It is considered to be a major innovation in water and soil in-situ remediation technology, and has great application prospects. However, nano...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J23/889B01J39/10C02F1/28C02F1/42C02F1/52C02F1/70C02F1/72
Inventor 席北斗赵颖李晓光李英军郝艳龚斌李瑞高如泰杨天学李曹乐王丽君彭星
Owner BEIJING VOCATIONAL COLLEGE OF AGRI
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