Design and preparation of a chelating resin and its research application against cadmium ions in rice

A chelating resin, cadmium ion technology, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of unsatisfactory adsorption performance and selectivity, and achieve obvious environmental protection, production High efficiency and easy operation

Inactive Publication Date: 2019-03-19
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing adsorbents for cadmium include chitosan, modified chitin, etc., but the adsorption performance and selectivity are not very satisfactory.

Method used

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  • Design and preparation of a chelating resin and its research application against cadmium ions in rice
  • Design and preparation of a chelating resin and its research application against cadmium ions in rice
  • Design and preparation of a chelating resin and its research application against cadmium ions in rice

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Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: a kind of chelating resin of cadmium ion in the adsorbable solution

[0043] 1) Accurately weigh 60.0mg of chlorine spheres, transfer them into a 100mL three-necked bottle, add 40mL of N,N-dimethylformamide (DMF) and soak overnight until the chlorine spheres swell.

[0044] 2), add 2-mercaptothiazoline as a ligand to the resultant of step 1), add sodium as a catalyst under the protection of nitrogen and keep stirring at a reaction temperature of 110°C (150r / min) to react for 10 hours , where, 2-mercaptothiazoline and -CH on the chlorine ball 2 The ratio of Cl to substance is 3:1;

[0045] 3), after the reaction is finished, filter the product obtained in step 2) to obtain a filter cake, and soak and wash the obtained filter cake with N,N-dimethylformamide (DMF) for 3 to 4 times (each dosage is 40ml) , then wash with absolute ethanol, acetone, ether successively, repeat 3 times (each time, the consumption of acetone is 40ml, the consumption of ether is 40...

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Abstract

The invention provides novel chelating resin and a method for absorbing cadmium ions with the same. A preparation method of the novel chelating resin includes the steps that firstly, chloromethyl polystyrene resin is soaked in N,N-dimethylformamide serving as a reaction solvent till the chloromethyl polystyrene resin is fully swelled; secondly, 2-mercaptothiazoline serving as a ligand and sodium serving as a catalyst are added into the product obtained in the first step, and are stirred and react for 12 hours at the temperature of 110 DEG C under the condition of nitrogen protection, and the mass ratio of 2-mercaptothiazoline to -CH2Cl matter in the chloromethyl polystyrene resin is 3:1; thirdly, the product obtained in the second step is filtered to obtain a filter cake, the filter cake is soaked and washed with the reaction solvent till a cleaning solution is colorless, then the product is washed with distilled water and then washed sequentially with anhydrous ethanol, acetone and diethyl ether for several times, vacuum drying is conducted at the temperature of 50 DEG C, and the novel chelating resin is obtained. The novel chelating resin has the advantages of being capable of selectively adsorbing the cadmium ions in an aqueous solution, good in adsorption performance, capable of being repeatedly used and the like.

Description

technical field [0001] The present invention relates to a synthesis method, performance research and specific application of a new functional chelating resin, in particular to a new functional chelating resin with good adsorption performance for cadmium ions in aqueous solution, selective adsorption, and reusability. Its preparation method and practical application. Background technique [0002] Cadmium pollution in workplaces is mainly caused by cadmium and its compounds used in production processes, such as electroplating and battery production processes. The main pollution sources of cadmium in the environment are: waste water and waste gas produced during the mining, beneficiation and smelting of lead-zinc mines; the production and processing of alloy steel; the production waste water of cadmium electroplating, dyes, pesticides, paints, glass, ceramics, Production and processing of photographic materials, etc. Plants absorb cadmium enriched in the soil, which can incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62C02F101/20
CPCB01J20/26B01J2220/4812C02F1/285C02F1/62C02F2101/20
Inventor 熊春华杨奕闵敏金姣姣夏海娜厉炯慧
Owner ZHEJIANG GONGSHANG UNIVERSITY
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