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Application of porous cationic polymer in removal of dyes or heavy metals in wastewater

A technology of cationic polymers and heavy metals, applied in animal processing wastewater treatment, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as unfavorable water treatment applications, expensive monomers, instability, etc., to achieve Stable structure, strong modifiability, and high site density

Active Publication Date: 2020-07-31
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the monomers used in the preparation of MOF materials in this invention are expensive, they are usually unstable in water bodies, which is not conducive to industrial water treatment applications

Method used

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  • Application of porous cationic polymer in removal of dyes or heavy metals in wastewater
  • Application of porous cationic polymer in removal of dyes or heavy metals in wastewater
  • Application of porous cationic polymer in removal of dyes or heavy metals in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Synthesis of Porous Cationic Polymer PIm-DCX

[0037] Dissolve 2-phenylimidazole (PIm) (1 mmol) and α,α'-dichloro-p-xylene (DCX) (1 mmol) at a molar ratio of 1:1 in 10 mL of 1,2-dichloroethane solution, Add anhydrous FeCl to the above solution 3 (4 times the molar amount of the monomer) (4 mmol), the mixture was stirred and reacted at a temperature of 80° C. for 24 h. After the reaction was completed, cool to room temperature, collect the precipitate by filtration and wash it with methanol until the washing solution was clear, then extract it with methanol for 24 hours. The purified solid product was vacuum-dried at 80° C. for 24 hours to obtain a brown powdery solid porous cationic polymer PIm-DCX.

[0038] The structural formula of the porous cationic polymer PIm-DCX is as follows:

[0039]

[0040] SEM of the porous cationic polymer PIm-DCX as figure 1 As shown, it is an amorphous structure, and a large number of small nanoparticles are piled up into a porous ...

Embodiment 2

[0044] Synthesis of Porous Cationic Polymer PIm-BCMB

[0045] Dissolve 2-phenylimidazole (PIm) (1 mmol) and biphenyldichlorobenzyl (BCMB) (1 mmol) at a molar ratio of 1:1 in 10 mL of 1,2-dichloroethane solution, and add Anhydrous FeCl 3 (4 times the molar amount of the monomer) (4 mmol), the mixture was stirred and reacted at a temperature of 90° C. for 22 h. After the reaction was completed, cool to room temperature, collect the precipitate by filtration and wash it with methanol until the washing solution was clear, then extract it with methanol for 24 hours. The purified solid product was vacuum-dried at 80° C. for 24 hours to obtain a brown powdery solid porous cationic polymer PIm-BCMB.

[0046] The structural formula of the porous cationic polymer PIm-BCMB is as follows:

[0047]

[0048] The infrared spectrum of the porous cationic polymer PIm-BCMB is as follows figure 2 Shown at 1656 and 1567cm -1 The two absorption peaks at are from the stretching vibration o...

Embodiment 3

[0051] Synthesis of Porous Cationic Polymer PPY-DCX

[0052] Dissolve 2-phenylpyridine (PPY) (1 mmol) and α,α'-dichloro-p-xylene (DCX) (1 mmol) at a molar ratio of 1:1 in 10 mL of 1,2-dichloroethane solution, Add anhydrous FeCl to the above solution 3 (4 times the molar amount of the monomer) (4 mmol), the mixture was stirred and reacted at a temperature of 80° C. for 24 h. After the reaction was completed, cool to room temperature, collect the precipitate by filtration and wash it with methanol until the washing solution was clear, then extract it with methanol for 24 hours. The purified solid product was vacuum-dried at 80° C. for 24 hours to obtain a brown powdery solid porous cationic polymer PPY-DCX.

[0053] The structural formula of the porous cationic polymer PPY-DCX is as follows:

[0054]

[0055] Scanning electron microscopy of the porous cationic polymer PPY-DCX as figure 1 As shown, it is an amorphous structure, and a large number of small nanoparticles are...

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Abstract

The invention discloses an application of a porous cationic polymer in removal of dyes or heavy metals in wastewater. The concentration range of the heavy metal acid radical ions in the wastewater is0-200mg / L; the concentration of the dye in the wastewater ranges from 0 mg / L to 500 mg / L, the concentration of the porous cationic polymer in the wastewater ranges from 0.5 mg / mL to 1.5 mg / mL, heavy metal acid radical ions in the wastewater are dichromate, permanganate and arsenate, and the dye in the wastewater is methyl orange, methylene blue, rhodamine B, Congo red and chrome black T. The porous cationic polymer disclosed by the invention is high in surface active site density, can be used for rapidly, efficiently and synergistically removing dyes and heavy metal ions in wastewater, and isan efficient and cheap adsorbent for synergistically removing dyes and heavy metals in industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of functional materials and environmental treatment, in particular to the application of a porous cationic polymer in the removal of dyes or heavy metals in wastewater, which is suitable for the removal of dyes and heavy metal acid radical salts in wastewater from industries such as leather, textiles, papermaking, and electroplating. remove. Background technique [0002] With the rapid development of the economy, enterprises such as smelting, electrolytic plating, medicine, tanning, and dyes have to discharge a large amount of industrial wastewater containing dyes and heavy metal ions every year. They pass through the soil, water, air, and especially the food chain. Human body and mind A serious health hazard has arisen. Since dyes and heavy metal pollutants are difficult to be decomposed and destroyed, once they are discharged into the environment, they will cause permanent pollution. The main methods for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/26B01J20/28B01J20/30C02F101/10C02F101/20C02F101/22C02F101/30C02F101/34C02F101/36C02F101/38C02F103/24
CPCC02F1/285B01J20/264B01J20/28064B01J20/28066B01J20/28073B01J20/28076B01J20/28083C02F2101/22C02F2101/206C02F2101/103C02F2101/38C02F2101/36C02F2101/34C02F2101/308C02F2101/40C02F2103/24
Inventor 胡军赵开庆孔令凯潘冯弘康吴若雨刘洪来
Owner EAST CHINA UNIV OF SCI & TECH
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