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

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...

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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.

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