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Preparation method of magnetic polymer heavy metal ion adsorbent

A technology of heavy metal ions and polymers, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as difficult separation and secondary pollution, improve compatibility, reduce input costs, Avoid the effect of reunion

Active Publication Date: 2017-11-17
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, magnetic nanoparticles were prepared by improved chemical co-precipitation method, and then the surface was modified with γ-chloropropyltrimethoxysilane and polyethyleneimine respectively to obtain polyethyleneimine-modified magnetic nanoparticles. Ethyleneimine modified magnetic nanoparticles and functional monomers are copolymerized to prepare a magnetic polymer heavy metal ion adsorbent with a multi-layered crosslinking structure and a variety of heavy metal ion adsorption groups. The magnetic nanoparticles modified by polyethyleneimine , to improve the compatibility of magnetic nanoparticles and polymer matrix, through the physical entanglement and hydrogen bonding of polyethyleneimine macromolecular chains grafted on the surface of magnetic nanoparticles and polymer matrix, to avoid the agglomeration of magnetic nanoparticles and inhibit The macroscopic phase separation of magnetic nanoparticles and polymer matrix realizes the magnetic intelligent separation of heavy metal ion adsorption of magnetic polymers, which better solves the shortcomings of ordinary adsorbents such as difficult solid-liquid separation and easy secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 19.6g FeCl3 6H2O and 7.2g FeCl2 4H2O and 150mL deionized water into a three-necked flask, stir evenly, and heat up to 60°C after nitrogen protection for 30min, then add 50g of ammonia solution with a mass concentration of 25-30% dropwise, After the ammonia solution was added dropwise, react at a constant temperature under nitrogen protection for 5 hours, cool down to room temperature, wash with deionized water three times, and separate with a magnet to obtain magnetic nanoparticles; 1g of magnetic nanoparticles, 2g of γ-chloropropyltrimethoxysilane and 100mL of deionized Add water into the three-necked flask and stir evenly, heat up to 60°C after nitrogen protection for 30 minutes, then add dropwise 2 g of ammonia solution with a mass concentration of 25-30%, react at constant temperature under nitrogen protection for 5 hours, cool down to room temperature, and wash with deionized water for 5 times. Magnet separation to obtain chloropropyl modified nano magnetic part...

Embodiment 2

[0032] Add 30g FeCl3 6H2O and 10g FeCl2 4H2O and 200mL deionized water into a three-necked flask, stir evenly, protect with nitrogen for 30 minutes, then raise the temperature to 70°C, then add 60g of ammonia solution with a mass concentration of 25-30% dropwise, and add the ammonia solution dropwise After completion, the reaction was carried out under constant temperature under nitrogen protection for 4 hours, cooled to room temperature, washed with deionized water for 5 times, and separated by a magnet to obtain magnetic nanoparticles; 5g of magnetic nanoparticles, 15g of γ-chloropropyltrimethoxysilane and 200mL of deionized water were added to the three-hole Stir evenly in the flask, heat up to 70°C after nitrogen protection for 30 minutes, then add dropwise 15 g of ammonia solution with a mass concentration of 25-30%, react at constant temperature under nitrogen protection for 4 hours, cool down to room temperature, wash with deionized water for about 5 times, and separate w...

Embodiment 3

[0035] Add 10g FeCl3 6H2O and 5g FeCl2 4H2O and 100mL deionized water into a three-necked flask, stir evenly, protect with nitrogen for 30 minutes, then raise the temperature to 80°C, then add 25g of ammonia solution with a mass concentration of 25-30% dropwise, and add the ammonia solution dropwise After completion, the reaction was carried out at constant temperature under nitrogen protection for 3 hours, cooled to room temperature, washed with deionized water for 4 times, and separated by a magnet to obtain magnetic nanoparticles; 3 g of magnetic nanoparticles, 8 g of γ-chloropropyltrimethoxysilane and 150 mL of deionized water were added to the Stir evenly in the flask, heat up to 80°C under nitrogen protection for 30 minutes, then add dropwise 10 g of ammonia solution with a mass concentration of 25 to 30%, react at a constant temperature under nitrogen protection for 3 hours, then cool down to room temperature, wash with deionized water for 3 times, and separate with a mag...

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Abstract

The invention relates to a preparation method of a magnetic polymer heavy metal ion adsorbent. An improved chemical co-precipitation method is used for preparing magnetic nano particles, surface modification is conducted on the magnetic nano particles with gamma-choropropyltrimethoxysilane and polyethyleneimine to obtain polyethyleneimine modified magnetic nano particles, and finally, the polyethyleneimine modified magnetic nano particles and functional monomers are subjected to copolymerization to prepare the magnetic polymer heavy metal ion adsorbent with a multi-level cross-linking structure and multiple adsorption groups; the saturation magnetization is 3.5-15.5 emu / g, remanent flux density and coercive field strength both approach to zero, the paramagnetism and the magnetic responsiveness are provided, for a heavy metal ion aqueous solution with an initial concentration of 100-1000 mg / L, the heavy metal ion adsorption capacity reaches 35-450 mg / g, adsorption equilibrium can be reached in 50-100 min, the heavy metal ion adsorption capacity after 5-time recycling is more than 85% of the first adsorption capacity, and the method can be widely applied in heavy metal ion adsorption and separation, pollution abatement of heavy metal ions and the like.

Description

1. Technical field [0001] The invention relates to a preparation method of a magnetic polymer heavy metal ion adsorbent. The magnetic polymer heavy metal ion adsorbent prepared by the invention is suitable for the adsorption and separation of heavy metal ions, and can be widely used in heavy metal ion adsorption, heavy metal ion separation and purification, and heavy metal ion adsorption. Environmental pollution control, etc. 2. Background technology [0002] With the improvement of global industrialization, environmental pollution is becoming more and more serious. Among them, water pollution has seriously affected people's production and life. Industrial wastewater is the main source of heavy metal pollution in water bodies. Many industrial processes, such as electroplating, tanning, mining, steelmaking, dyeing, etc. , will produce a large amount of wastewater containing heavy metal ions, such as Cd 2+ 、Cu 2+ , Pb 2+ 、Ni 2+ 、As 3+ , Hg 2+ 、Cr 3+ 、Co 2+ and Co 3+ e...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/264B01J20/28009C02F1/285C02F2101/20
Inventor 万涛唐利熊静王艳芬彭睿廉周玉海刘玥莹卿欢
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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