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Mercury ion adsorbent preparation method

An adsorbent and mercury ion technology, applied in the field of preparation of mercury ion adsorbents, can solve problems such as mercury ion pollution, and achieve the effects of simple and easy process steps, strong acid resistance and strong stability

Inactive Publication Date: 2017-07-07
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the existing problems of being polluted by mercury ions, etc., the purpose of the present invention is to provide a method for preparing a mercury ion adsorbent, through which the functional adsorption material can effectively remove mercury ions in water bodies, and realize the coordinated development of ecosystems and human beings

Method used

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preparation example Construction

[0026] In specific implementation process, the preparation method of mercury ion adsorbent of the present invention comprises the following steps:

[0027] (1) Firstly, diatomite is ground into powder, and after being treated with a 200-mesh standard sieve, sulfuric acid with a concentration of 40wt% is added at a solid-to-liquid ratio of 1:4, mechanically stirred, heated at 80°C, treated for 8h, and then distilled water Wash until neutral, filter with suction, dry in a drying oven at 50-100°C for 24 hours, and finally put it in a muffle furnace at 450°C, heat for 4 hours and seal it for later use.

[0028] (2) In a round-bottomed flask, take 50ml of ethanol solution with a volume fraction of 80% as a solvent, add 1-6g of refined diatomaceous earth, disperse ultrasonically for 30min, and add a certain amount of amino coupling agent under vacuum or nitrogen protection , reacted at 45°C for 12h, washed with ethanol, dried by suction filtration, put into an oven at 45°C, and drie...

Embodiment 1

[0048] In the present embodiment, the preparation method of mercury ion adsorbent is as follows:

[0049] (1) First, diatomite is ground into powder, sieved through a 200-mesh standard sampling sieve, then adding sulfuric acid with a concentration of 40wt% according to a solid-to-liquid ratio of 1:4, mechanically stirring, heating at 80°C, and treating for 8h, then using Wash with distilled water until it is neutral, filter it with suction, put it in a drying oven at 50-100°C for 24 hours, and finally put it in a muffle furnace at 450°C, heat it for 4 hours to form refined diatomite and seal it for later use;

[0050] Such as figure 1 As shown, it can be seen from the FT-IR spectrum of refined diatomite that at 3660cm -1 The broad peak at is attributed to the Si-OH antisymmetric stretching vibration at 1090cm -1 The asymmetric strong absorption broadband at is attributed to Si-O antisymmetric stretching vibration, 800cm -1 The place is Si-O symmetric stretching vibration, w...

Embodiment 2

[0055] In the present embodiment, the preparation method of mercury ion adsorbent is as follows:

[0056] (1) is synthetically identical with step (1) in embodiment 1;

[0057] (2) In a round bottom flask, take 50ml of ethanol solution with a volume fraction of 80% as a solvent, add 5g of refined diatomaceous earth, and ultrasonically disperse for 30min. Under vacuum or nitrogen protection, add 2ml of amino coupling agent KH550, React at 45°C for 12h, wash with ethanol, filter and dry, put in an oven at 45°C, and dry in vacuum for 24h to form amino-modified diatomaceous earth.

[0058] Such as figure 2 As shown, it can be seen from the FT-IR spectrum of amino-modified diatomaceous earth that at 3450cm -1 The N-H stretching vibration peak appears at 2938, the C-H stretching vibration peak appears at 2938 and the 1637cm -1 N-H scissor vibration peak appears at 691cm -1 N-H non-planar bending vibration peaks appear at , and these characteristic peaks indicate that amino grou...

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Abstract

The invention relates to the technical field of adsorption of mercury ions in water, in particular to a mercury ion adsorbent preparation method. Firstly, through the effect of a KH-550 coupling agent and diatomite surface rich hydroxyl, upper active functional group-NH2 is modified by diatomite, by controlling the mass ratio of the diatomite to the coupling agent, a series of modified compounds are obtained, through an infrared spectrum and TG analysis, and the mass ratio with a high modification content is obtained; then, the diatomite modified by NH2 is connected with chitosan by using glutaraldehyde as a bridge, and by controlling the mass ratio of the modified diatomite to the chitosan to the glutaraldehyde, a functional mercury ion adsorbent is obtained. Compared with previous adsorbent physical blending, the adsorbent is rich in required material, simple in preparation process and more stable and has strong acid resistant and alkali-resistant capacities.

Description

technical field [0001] The invention relates to the technical field of mercury ion adsorption in water bodies, in particular to a preparation method of a mercury ion adsorbent. Background technique [0002] Due to the development of modern industry, a large number of pollutants containing heavy metals have entered the water environment. Heavy metals have the characteristics of latent, refractory, and easy accumulation. They are easy to accumulate in organisms, and can enter the human body through the food chain and eventually harm Human health not only causes major economic losses, but also has a major impact on ecosystems and humans. Among heavy metal pollution, mercury ion water pollution is more prominent. Today, water is an important and rare resource, so how to solve the surface water and groundwater polluted by mercury ions is our top priority. [0003] The treatment methods of mercury ion wastewater usually include chemical precipitation method, ion exchange method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/28B01J20/24C02F1/28C02F101/20
CPCB01J20/14B01J20/22B01J20/24B01J20/28057B01J20/28069C02F1/28C02F1/281C02F1/285C02F1/286C02F2101/20
Inventor 胡建设付永张正洁
Owner NORTHEASTERN UNIV
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