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Magnetic cyclodextrin-based crosslinked polymer adsorption material and preparation method thereof

A cross-linked polymer and adsorption material technology, which is applied in the field of magnetic cyclodextrin-based cross-linked polymer adsorption materials and its preparation, can solve the problems of complex treatment process, complex wastewater composition, and failure, and achieve a wide range of applications

Active Publication Date: 2019-08-13
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this step-by-step treatment method has the following problems: (1) Due to the complex composition, mutual influence and restriction of this type of wastewater, the method for separately treating heavy metals and organic matter does not consider the impact of organic matter or heavy metals in the scheme design, and there are defects in the method. Most of the treatment effects are poor or even invalid; (2) the treatment process is more complicated, there are many steps, the operation is complicated, and the cost is high; (3) since heavy metals and organics are treated separately, no synergistic removal effect can be produced
In addition, the separation of the adsorbent material after treatment is also an important issue that needs to be considered emphatically.

Method used

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  • Magnetic cyclodextrin-based crosslinked polymer adsorption material and preparation method thereof
  • Magnetic cyclodextrin-based crosslinked polymer adsorption material and preparation method thereof
  • Magnetic cyclodextrin-based crosslinked polymer adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 5.54 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensing device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 15%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:30, and 1.08 g of sodium hydroxide with a mass fraction of 96% is added to a three-necked flask for dissolution ;

[0035] (2) Add 0.50 g of ferric oxide microspheres into the solution in step (1) according to the mass ratio of β-cyclodextrin and ferric oxide microspheres to 1:0.5, and ultrasonically assisted stirring for 30 min;

[0036] (3) Add 22.18mL of liquid paraffin and 1.48g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:4, the mass volume ratio of the emulsifier to the oil phase is 1:15g / mL, and ultrasonic After auxiliary stirring for 30 minut...

Embodiment 2

[0039] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 3.91 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensation device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 20%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:40, and 1.44g of mass fraction of 96% sodium hydroxide is added to a three-necked flask for dissolution ;

[0040] (2) Add 1.00 g of ferric oxide microspheres into the solution of step (1) according to the mass ratio of β-cyclodextrin and ferric oxide microspheres as 1:1, and ultrasonically assist stirring for 40 min;

[0041] (3) Add 23.45mL of liquid paraffin and 1.56g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:6, the mass volume ratio of the emulsifier to the oil phase is 1:15g / mL, and ultrasonic After auxiliary stirring for 30 minutes, the te...

Embodiment 3

[0044] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 3.91 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensation device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 20%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:50, and 1.80 g of sodium hydroxide with a mass fraction of 96% is added to a three-necked flask for dissolution ;

[0045] (2) Add 1.50 g of ferric oxide microspheres into the solution in step (1) according to the mass ratio of β-cyclodextrin and ferric oxide microspheres to 1:1.5, and ultrasonically assisted stirring for 60 min;

[0046] (3) Add 31.26mL of liquid paraffin and 1.56g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:8, the mass volume ratio of the emulsifier to the oil phase is 1:20g / mL, and ultrasonic After auxiliary stirring for 30 min...

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Abstract

The invention discloses a magnetic cyclodextrin-based crosslinked polymer adsorption material and a preparation method thereof. According to the material, magnetic ferroferric oxide microspheres are used as inner cores, cyclodextrin, epichlorohydrin and polyethylene polyamine are used as raw materials, dialdehyde is used as a crosslinking agent, and core-shell magnetic adsorption polymer microspheres are prepared by using crosslinking active polymer layers for coating online through a reversed-phase microemulsion method. The obtained adsorption material contains not only abundant active groupssuch as amino groups, imine groups and hydroxyl groups but also ferroferric oxide microsphere inner cores with strong magnetism and cyclodextrin units capable of forming clathrate compounds with organic pollutants. The material solves the problems that traditional adsorbents are poor in heavy metal-organic matter composite pollutant disposal effect, low in efficiency and high in cost, heavy metaland organic pollutants in wastewater cannot be removed synchronously, particularly, the separation and recovery of the adsorbents after disposal are difficult, and it is difficult to automatically control the operation and achieve continuity. The adsorption material is suitable for disposing different kinds of wastewater containing heavy metal, organic matter and heavy metal-organic matter composite pollutants.

Description

technical field [0001] The invention relates to an adsorption material, in particular to a magnetic cyclodextrin-based cross-linked polymer adsorption material and a preparation method thereof. Background technique [0002] With the rapid development of the economy, water pollution has become the most difficult and urgent environmental safety problem in the world today. In recent years, the pollution of rivers, lakes, reservoirs, and coastal waters has shown an overall upward trend. These pollution problems have had an impact on human health and the ecological environment that cannot be ignored. With the rapid development of industries such as mining, smelting, electroplating, chemical fertilizers, pesticides, dyes, and printing, a large amount of wastewater rich in heavy metal ions and refractory organic matter is directly or indirectly discharged into the environment. Heavy metals such as Hg, Pb, Cd, Cr, Mn, Ni, Cu, etc. are not biodegradable and persistent, and accumulat...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/24B01J20/06B01J20/28009B01J20/28016C02F1/288C02F1/286C02F2101/308C02F2101/20
Inventor 刘立华杨正池粟刚董文豪魏作校薛建荣唐安平
Owner HUNAN UNIV OF SCI & TECH
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