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Preparation method of mercury ion imprinting adsorption material

A technology of imprinted adsorption and mercury ions, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as difficult application treatment, incomplete treatment of mercury wastewater, secondary pollution, etc., and achieve good adsorption capacity , excellent regenerative ability, excellent adsorption ability effect

Pending Publication Date: 2022-03-25
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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Problems solved by technology

However, the chemical precipitation method has disadvantages such as easy to cause water hardening, incomplete treatment of low-concentration mercury wastewater due to the influence of solubility product, easy to cause secondary pollution, and difficult to apply to the treatment of flowing water.

Method used

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  • Preparation method of mercury ion imprinting adsorption material
  • Preparation method of mercury ion imprinting adsorption material
  • Preparation method of mercury ion imprinting adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 4mmol of allylthiourea to 2mmol of mercuric chloride solution according to the molar ratio of 1:2, dissolve in 10mL of methanol, add 10mL of N,N-dimethylformamide, shake for 2 hours, then add 40mmol of ethylene glycol dimethyl Methyl acrylate, 1.12 mmol of azobisisobutyronitrile initiator, shaken for 2 hours.

[0025] The above solution was passed through nitrogen gas for 10 minutes under the condition of ice bath, and then shaken in a water bath at 60°C for 24 hours.

[0026] The resulting polymer was crushed and sieved to 30-38.5 μm polymer particles.

[0027] Then use 0.5% thiourea + 0.5mol / L HNO 3 Wash until free of Hg 2 + check out. Vacuum drying at 35°C overnight to obtain mercury ion-imprinted polymer (MIP).

[0028] The synthesis steps of NIP are exactly the same as those of MIP, except that template molecules are not added during synthesis. The obtained polymers were subjected to adsorption experiments and characterizations. The specific synthesis and...

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Abstract

The invention discloses a preparation method of a mercury ion imprinting adsorption material, which comprises the following steps: mixing a mercuric chloride solution and allylthiourea according to a mol ratio of 1: (2-4), adding a methanol solution, adding a functional monomer into the mixed solution according to a mol ratio of 2: (1-6), and stirring at room temperature for 1 hour to form a mercury ion complex; the functional monomer is N, N-dimethyl formamide; oscillating the mercury ion complex for 2 hours, adding ethylene glycol methyl methacrylate and azodiisobutyronitrile according to a mol ratio of (20-60): 1, introducing inert gas for 10 minutes, and oscillating in a water bath kettle at 60 DEG C for 24 hours to form a polymer solid; and crushing and sieving the polymer solid to obtain polymer particles with the particle size of 30-38.5 microns, and carrying out vacuum drying at 35 DEG C to obtain the mercury ion imprinted polymer. The polymer ion imprinting material disclosed by the invention has good adsorption capacity on divalent mercury in a water body and a gas phase, and is an effective adsorbent for efficiently adsorbing Hg (II) in flue gas.

Description

technical field [0001] The invention belongs to the technical field of mercury ion imprinted adsorption, in particular to a method for preparing a mercury ion imprinted adsorption material. Background technique [0002] my country is the world's largest producer, user and emitter of mercury. In terms of water pollution, heavy metal mercury pollution is usually difficult to control. Since mercury ions cannot be decomposed and destroyed, the treatment of mercury-containing wastewater can only be the phase transfer of mercury ions or changes in its physical chemistry. state. The treatment methods of mercury metal wastewater mainly include chemical precipitation method, ion exchange method, evaporation concentration method, electrolysis method, liquid membrane method and adsorption method. At present, chemical precipitation is mostly used in industry to treat mercury-containing wastewater. The application technology of chemical precipitation method is easy to realize, especiall...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28B01D53/02C02F101/20
CPCB01J20/268B01J20/28004B01J20/28016C02F1/285B01D53/02C02F2101/20B01D2258/0283B01D2257/602B01D2253/202
Inventor 冯钦忠陈扬刘俐媛杨世童郭剑波王通哲张秀锦崔皓
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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