Preparation method of magnetic mercury removal adsorbent

A technology of adsorbent and adsorbent carrier, which is applied in the field of new adsorbents, can solve the problems of insufficient removal performance of heavy metal mercury ions, etc., and achieve the effect of simple and feasible preparation process, high mercury removal efficiency, and improved mercury removal ability

Inactive Publication Date: 2017-01-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The present invention aims at the current situation that the existing adsorbents have insufficient performance in removing heavy metal mercury ions in water, and provides a method of using common powdered activated carbon as a carrier to load magnetic ferromanganese oxides, and adding amino groups through simple modification After obtaining high-efficiency mercury removal performance

Method used

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preparation example Construction

[0019] A kind of preparation method of modified magnetic solution demercury adsorbent of the present invention comprises the following steps:

[0020] 1) Dissolve the divalent manganese salt and ferric salt, or iron salt and ferric salt mixed according to the molar ratio of elements of 1:2 to 2.5 with deionized water, slowly drop the strong alkali solution, and add the adsorbent carrier to participate together Reaction, control the reaction temperature, stir the mixed solution to make the reaction proceed;

[0021] 2) Apply an external magnetic field to the mixed solution to separate the precipitate, wash the precipitate with deionized water, and then add it to the ethanol solution; use ultrasound to disperse the particles in the ethanol solution, add a silane crosslinking agent, and stir Mix to make the reaction uniform and control the reaction conditions;

[0022] 3) The magnetic material is separated by using a magnetic field, and the mercury removal adsorbent is produced ...

Embodiment example 1

[0026] Weigh 4g FeCl 2 4H 2 O and 11 g FeCl 3 ·H 2 0, add the concentrated hydrochloric acid 2ml of 12mol / L again and be dissolved in 450ml deionized water, then above solution is added dropwise in the 0.75mol / L potassium hydroxide solution of 450ml, reaction temperature is controlled at 80 ℃, stirs reactant. Add activated carbon fiber, as the reaction proceeds, the black precipitate generated in the reaction solution is adsorbed to the surface of activated carbon. Then use an external magnetic field to separate the activated carbon loaded with nanoparticles from the reaction medium, wash with deionized water for 3 times, and wash with ethanol for 2 times, add about 50ml of the resultant to the mixture of ethanol and deionized water, and dilute to 300ml . Add 1ml of aminopropyltrimethoxysilane (APTMS), stir and mix at room temperature to make the reaction uniform, and it will be ready after 6 hours. The adsorbent is separated from the solution by a centrifuge, washed with...

Embodiment example 2

[0028] Co-precipitation method is used to mix ferrous sulfate and ferric chloride with a molar ratio of 1:2, dissolve them with a certain amount of deionized water, and then add activated carbon powder thereto. The reaction temperature was controlled at 80°C and the stirring rate was 500r / min. After reacting for 40 minutes, an external magnetic field was applied for separation, washed with deionized water to a neutral state, and then dried at 60°C. Disperse the particles in the solution, add amino-functionalized drugs, stir and mix to make the reaction uniform, and control the reaction conditions. The magnetic material is separated by a magnetic field, washed with ethanol and deionized water several times, and dried at 70° C. for 18 hours to prepare the mercury-removing adsorbent.

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Abstract

The invention discloses a preparation method of a magnetic mercury removal adsorbent. The magnetic mercury removal adsorbent adopts magnetic Mn ferrite nanoparticles, carriers are added to the magnetic nanoparticles to improve the performance, and then the magnetic nanoparticles are subjected to amino-functionalization through modification and addition of a specific solution. According to the preparation method, corresponding salt is dissolved with ionized water, a strong base solution is added, stirred and heated, a reaction product is separated by means of an external magnetic field, stirred, heated and dried, and the amino-functionalized magnetic adsorbent prepared through modification is obtained and can acquire good mercury removal performance. Two modification processes are combined, and removal of mercury ions in a solution by the adsorbent can be improved effectively.

Description

technical field [0001] The invention belongs to the field of mercury removal from industrial wastewater, and relates to a novel adsorbent that can be easily separated by loading a magnetic source on the surface of activated carbon, adding amino groups to the magnetic source to improve the mercury removal performance in solution, and a preparation method thereof . Background technique [0002] The pollution of water by modern industry has led to a serious water resource crisis, and an important part of water pollution is heavy metal pollution. Among them, mercury is highly volatile and will not be captured by the dust collector in the flue gas, and is known for its particularly serious hazards. Mercury has strong toxicity, persistence, and volatility. It can be deposited in water for a long time to form other forms of mercury compounds. It can enter the human body through the food chain and accumulate in the human body. It is very harmful, and its concentration is relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28C02F1/28B01J20/10B01J20/30C02F101/20
CPCB01J20/06B01J20/103C02F1/281B01J20/28009C02F2101/20
Inventor 黄亚继王靓孙青柯董璐谢江坤谭美秀
Owner SOUTHEAST UNIV
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