Heavy metal ion porous adsorbent as well as preparation method and application thereof

A technology of heavy metal ions and porous adsorbents, applied in the directions of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of difficult separation of heavy metals, poor adsorption efficiency, inability to fix polyacrylic acid, etc. Good diffusivity, improved adsorption rate and usable capacity, good adsorption effect

Active Publication Date: 2017-12-08
CRRC TANGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the good solubility of PAA in water, when it is used alone for wastewater treatment, it has the disadvantages that the heavy metals after adsorption are difficult to separate, so it is usually necessary to fix it on a carrier matrix in order to ensure the adsorption performance of polyacrylic acid. practical application
[0004] At present, the existing solid matrix cannot form a good immobilization effect on polyacrylic acid, resulting in poor adsorption efficiency of polyacrylic acid to heavy metal ions (for example, the adsorption rate of copper ions is usually about 80%, or lower)

Method used

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  • Heavy metal ion porous adsorbent as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation method of the heavy metal ion porous adsorbent of this embodiment includes the following steps:

[0049] 1. Preparation of concentrated emulsion

[0050] 0.11g of initiator K 2 S 2 O 8 And 0.55g of electrolyte K 2 SO 4 Dissolve in deionized water to obtain a dispersed phase (ie water phase).

[0051] 4.0g of glycidyl ethacrylate, 3.0g of divinylbenzene and 3.0g of Tween 80 were mixed uniformly at a stirring speed of 500 rpm to obtain a continuous phase (ie organic phase); among them, Tween 80 was continuously The mass content in the phase is 30%.

[0052] The dispersed phase is added dropwise to the continuous phase to obtain a stable milky white concentrated emulsion; wherein the volume content of the dispersed phase in the concentrated emulsion is 88%.

[0053] 2. Preparation of porous polymers

[0054] The milky white concentrated emulsion is polymerized at 70° C. for 45 hours to obtain a polymerization product.

[0055] The polymerization product was washed alt...

Embodiment 2

[0077] The preparation method of the heavy metal ion porous adsorbent of this embodiment includes the following steps:

[0078] 1. Preparation of concentrated emulsion

[0079] 0.11g of initiator K 2 S 2 O 8 And 0.55g of electrolyte Na 2 SO 4 Dissolve in deionized water to obtain the water phase.

[0080] 4.0 g of glycidyl ethacrylate, 3.0 g of divinylbenzene and 2.3 g of Tween 80 were mixed uniformly at a stirring speed of 500 rpm to obtain an organic phase; wherein the mass content of Tween 80 in the organic phase Is 25%.

[0081] The water phase is added dropwise to the organic phase to obtain a stable milky white concentrated emulsion; wherein the volume content of the water phase in the concentrated emulsion is 90%.

[0082] 2. Preparation of porous polymers

[0083] The milky white concentrated emulsion is polymerized at 70° C. for 45 hours to obtain a polymerization product.

[0084] The polymerization product was washed alternately with deionized water and ethanol, and then dried...

Embodiment 3

[0091] The preparation method of the heavy metal ion porous adsorbent of this embodiment includes the following steps:

[0092] 1. Preparation of concentrated emulsion

[0093] 0.11g of initiator K 2 S 2 O 8 And 0.55g of electrolyte K 2 SO 4 Dissolve in deionized water to obtain the water phase.

[0094] 4.0g of glycidyl ethacrylate, 3.0g of divinylbenzene and 3.8g of Span 20 were mixed uniformly at a stirring speed of 500 rpm to obtain an organic phase; wherein the mass content of Span 20 in the organic phase Is 35%.

[0095] The water phase is added dropwise to the organic phase to obtain a stable milky white concentrated emulsion; wherein the volume content of the water phase in the concentrated emulsion is 90%.

[0096] 2. Preparation of porous polymers

[0097] The milky white concentrated emulsion is polymerized at 70° C. for 45 hours to obtain a polymerization product.

[0098] The polymerization product was washed alternately with deionized water and ethanol, and then dried at 60...

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Abstract

The invention provides a heavy metal ion porous adsorbent as well as a preparation method and application thereof. The preparation method of the heavy metal ion porous adsorbent comprises the following steps: (1) dropwise adding a dispersion phase containing an initiator and an electrolyte into a continuous phase containing ethyl glycidyl acrylate, divynyl benzene and an emulsifier, thus obtaining concentrated emulsion; (2) carrying out polymerization reaction on the concentrated emulsion, and washing and drying a polymerization reaction product, thus obtaining a porous polymer; (3) carrying grafting reaction on polyacrylic acid and the porous polymer under the existence of a catalyst, thus obtaining the heavy metal ion porous adsorbent. The heavy metal ion porous adsorbent provided by the invention has good adsorption effect on various heavy metal ions.

Description

Technical field [0001] The invention relates to a heavy metal ion adsorbent, in particular to a heavy metal ion porous adsorbent and a preparation method and application thereof. Background technique [0002] At present, the copper ion (Cu 2+ ), lead ion (Pb 2+ ), zinc ion (Zn 2+ ), cadmium ion (Cd 2+ ) And other heavy metal ions are more and more serious to the environment, and more and more attention. Treatment methods for heavy metal ions in wastewater include adsorption, electrodialysis, ultrafiltration, etc. Among them, adsorption has the characteristics of high efficiency, flexible working environment, stability and selectivity, and is a traditional and very important separation method. However, the adsorption method also has certain limitations, such as lack of sites that fully bind to heavy metal ions, and limited dispersion in the matrix. These factors all reduce the rate and effect of adsorption. [0003] The carboxyl groups on the polymer molecular chain have strong ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F299/00C08F220/32C08F212/36C08J9/28B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/265B01J20/28059B01J20/28085C02F1/285C02F2101/20C08F220/32C08F220/325C08F299/00C08J9/28C08J2201/0502C08J2201/0504C08J2333/14C08F212/36
Inventor 刘民军王贵国张晓茜吕高腾杨雪峰王宏远王菲李硕
Owner CRRC TANGSHAN CO LTD
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