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Preparation method of adsorbent resin with Cr ion cavities

A technology for adsorbing resin and ions, applied in the field of water treatment, can solve problems such as no reports on the preparation method of adsorbent resin, and achieve the effect of high selectivity and high adsorption

Inactive Publication Date: 2010-11-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After searching the literature of the prior art, it is found that there is no report about "preparation method of adsorption resin with Cr ion holes"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh the following raw materials:

[0025] Chitosan 0.05mol;

[0026] Get single-capped polyethylene glycol-400 macromonomer by the mol ratio=1:1 of methacrylic acid single-capped polyethylene glycol-400 macromonomer and chitosan;

[0027] According to the molar ratio of acrylic acid double-capped polyethylene glycol-400 macromonomer to single-capped polyethylene glycol-400 macromonomer=1.5:1, take double-capped polyethylene glycol-400 macromonomer as cross-linking agent.

[0028] The preparation method of the present embodiment comprises the following steps:

[0029] Step 1, the chitosan of 0.05mol is dispersed in the aqueous solution of ethanol that is 50% by mass fraction, then adds single-capped polyethylene glycol-400 macromonomer, double-capped polyethylene glycol-400 macromonomer Stir evenly with photoinitiator 1173 of 1% of the total mass of the above two reactive monomers;

[0030] Step 2, adjust the acidity of the solution with methacrylic acid to dissolv...

Embodiment 2

[0033]Weigh the following raw materials:

[0034] Weigh chitosan 0.05mol;

[0035] Get single-capped polyethylene glycol-1000 macromonomer by the mol ratio=1:2.5 of chitosan and methacrylic acid single-capped polyethylene glycol-1000 macromonomer;

[0036] According to the molar ratio of acrylic acid double-capped polyethylene glycol-1000 macromonomer to single-capped polyethylene glycol-1000 macromonomer=1.5:1, take double-capped polyethylene glycol-1000 macromonomer as cross-linking agent.

[0037] The preparation method of the present embodiment comprises the following steps:

[0038] Step 1, the chitosan of 0.05mol is dispersed in the aqueous solution of ethanol that is 50% by mass fraction, then adds single-capped polyethylene glycol-1000 macromonomer, double-capped polyethylene glycol-1000 macromonomer And the photoinitiator 1173 of 1.8% of the total mass of the above two reactive monomers, stir evenly;

[0039] Step 2, use acrylic acid to adjust the acidity of the s...

Embodiment 3

[0042] Weigh the following raw materials:

[0043] Chitosan 0.05mol;

[0044] Get single-capped polyethylene glycol-400 macromonomer by the mol ratio=1:3 of methacrylic acid single-capped polyethylene glycol-400 macromonomer and chitosan;

[0045] According to the molar ratio of acrylic acid double-capped polyethylene glycol-1000 macromonomer and single-capped polyethylene glycol-400 macromonomer=1.5:1, take double-capped polyethylene glycol-1000 macromonomer as cross-linking agent.

[0046] The preparation method of the present embodiment comprises the following steps:

[0047] Step 1, the chitosan of 0.05mol is dispersed in the aqueous solution of the ethanol that is 50% by mass fraction, then adds single-capped polyethylene glycol-400 macromonomer, double-capped polyethylene glycol-1000 macromonomer and the photoinitiator 1173 of 3% of the total mass of the above two reactive monomers, and stir evenly;

[0048] Step 2, adjust the acidity of the solution with methacrylic...

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Abstract

The invention relates to a preparation method of an adsorbent resin with Cr ion cavities, belonging to the technical field of water treatment. The method comprises the following steps of: firstly, adding chitosan in an aqueous solution with ethanol, simultaneously adding single-methacrylic acid-terminated polyethylene glycol macromonomer, dual-methacrylic acid-terminated polyethylene glycol macromonomer, and then stirring to obtain a solution; secondly, adding acrylic acid or methacrylic acid in the solution, then adding Cr<3+>, and irradiating by using ultraviolet light to obtain a solid product; and thirdly, soaking the solid product in hydrochloric acid, regulating the pH of the solid product to 7 by using ammonia water, and then drying to obtain the adsorbent resin with the Cr ion cavities. The adsorbent resin prepared in the method has high selectivity and adsorbability on Cr ions, is beneficial to the accurate collection of the Cr ions to achieve the purposes of removal and recovery, and can be repeatedly used.

Description

technical field [0001] The invention relates to a preparation method in the technical field of water treatment, in particular to a preparation method of an adsorption resin with Cr ion holes. Background technique [0002] Groundwater accounts for 95% of the world's available freshwater resources. Groundwater accounts for 30% of the total amount of water used in cities in my country. The proportions of groundwater utilization in North China and Northwest cities are as high as 72% and 66% respectively. At present, about 50% of urban groundwater is polluted to varying degrees. Pollutants include heavy metals, metalloid ions (such as AsO 3 - ), organic matter and nitrate, etc., and most of them are compound pollution. Especially Cr 6+ As an ingestion poison and an inhalation poison, skin contact can cause allergy; it is more likely to cause genetic defects, inhalation may cause cancer, and has persistent danger to the environment. It can invade the human body through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 刘预孙承兴余宙仵彦卿
Owner SHANGHAI JIAO TONG UNIV
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