A kind of preparation method of starch/polyethyleneimine composite magnetic adsorption material

A polyethyleneimine, adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., to achieve the effects of high specific surface area, cheap and abundant raw materials, and simple and easy process

Active Publication Date: 2021-06-04
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Starch and polyethyleneimine are good cross-linked polymers. Because they have functional groups that chelate mercury ions such as hydroxyl and amino groups, they can maintain the characteristics of magnetic nanoparticles a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] Method for preparing a starch / polyethyleneimine composite magnetic adsorbent material, in accordance with the following steps:

[0026] (1) First, 2G nanocrystinal oxide three iron is 60 minutes in 500 ml of 0.125 mol / l HCl solution, and the ferric dioxide is separated by magnet, and the distilled water and anhydrous ethanol are washed multiple times, and ensure complete removal of HCl;

[0027] (2) 2 g acidified carrier methanedioxide was added to a round bottom flask containing 200 ml of distilled water and 800 ml of ethanol, and the ultrasound was dispersed at room temperature for 30 min, then 20 mL of ammonia water and 5 ml of orthosilicate were added dropwise, and the mixture was stirred at normal temperature for 6 h. Repeatedly washed with distilled water and anhydrous ethanol;

[0028] (3) The (2) product was added to the three flasks containing 800 ml of ethanol and 280 ml of distilled water, 0.2 g of hexadalkyltrimethylammonium methane, then...

Example Embodiment

[0031] Example 2:

[0032] Unlike Example 1, the tetra iron in the step (1) replaced into a mesh material, no magnet separation; the silane coupling agent in the step (4) is 3-aminopropyl three Oxyxisilyl; the mass ratio of the carrier and the silane coupling agent in the step (4) is 1: 2. The silane coupling agent in the step (5) is 3-aminopropyltrimethoxysilane; the starch in the step (5) is corn starch, the mass ratio of the starch and the silane coupling agent is 1: 3, The amylide and polyethylene imine mass ratio is 1: 5. The adsorbent obtained was tested and the adsorption amount was 239.64 mg / g, and the removal rate was 94.59%.

Example Embodiment

[0033] Example 3

[0034] Unlike Example 1, the tetra iris in the step (1) replaced with diatomaceous earth, no magnet separation; the silane coupling agent in the step (4) is a mercaptopyltrimethyl group Silane; the mass ratio of the carrier and the silane coupling agent in the step (4) is 1: 5. The silane coupling agent in the step (5) is a mercaptopyltrimethoxysilane; the starch in the step (5) is wheat starch, the mass ratio of the starch and the silane coupling agent is 1: 5, the Starch and polyethylene imine mass ratio of 1:10. The adsorbent obtained was tested, the amount of adsorption of the material was 231.18 mg / g, and the removal rate was 91.25%.

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Abstract

The invention relates to the technical fields of preparation of functionalized starch/polyethyleneimine composite magnetic adsorption material and mercury ion adsorption, and in particular to a preparation method of starch/polyethyleneimine composite magnetic adsorption material. The prepared adsorbent is effective Remove mercury ions from water.

Description

technical field [0001] The invention relates to the technical fields of preparation of functionalized starch / polyethyleneimine composite magnetic adsorption material and mercury ion adsorption, and in particular to a preparation method of functionalized starch / polyethyleneimine composite magnetic adsorption material with high efficiency and selective adsorption . Background technique [0002] The pollution of heavy metals to water bodies has become a serious environmental problem. Mercury ions and their compounds in water are highly toxic substances, causing serious harm to the natural environment and human health. Mercury ions in water can enter the human body through the food chain, especially aquatic products. Mercury can accumulate in the body and is difficult to excrete through its own metabolism. Mercury ingested in the human body will damage the liver and kidneys, and cause serious damage to the brain and nervous system. Irreversible damage, moreover, it can easily c...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/261B01J20/28009C02F1/288C02F2101/20
Inventor 胡建设武莹付永
Owner NORTHEASTERN UNIV
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