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Preparation method of cadmium ion imprinted material and application thereof

A technology of imprinting materials and cadmium ions, which is applied in the field of preparation of cadmium ion imprinting materials, can solve the problems of inability to achieve specific adsorption of metal ions, and achieve the effect of avoiding the damage of recognition sites and uniform particle size

Inactive Publication Date: 2019-03-22
BEIJING PURKINJE GENERAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the latter, from the early natural adsorption materials such as activated carbon to the current synthetic materials such as adsorption resins, the adsorption of metal ions is not selective, and specific adsorption of certain metal ions cannot be achieved.

Method used

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  • Preparation method of cadmium ion imprinted material and application thereof
  • Preparation method of cadmium ion imprinted material and application thereof
  • Preparation method of cadmium ion imprinted material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of Cadmium Ion Imprinted Polymer

[0023] (1) Mix 1mmol cadmium chloride and 1-6mmol surfactant micelles with 1mol high-purity water, and stir at room temperature for 1h;

[0024] (2) In the solution of step (1), add 1 to 6 mmol of functional monomer, and stir at room temperature for 1 hour to form a cadmium ion complex; the functional monomer is 3-mercaptopropyltrimethoxysilane;

[0025] (3) Dissolve 10-20 mmol tetraethyl orthosilicate in 2-10 ml methanol, mix with the solution in step (2), stir magnetically at room temperature for 24-48 hours, and react in a water bath at 90°C for 24 hours to form a polymer thing;

[0026] (4) The polymer formed in the step (3) is carried out in ethanol solution for 24h, and then washed repeatedly with 1mol / L hydrochloric acid solution until no cadmium ion is detected in the eluent, and finally washed with high-purity water until Neutral, oven dry.

[0027] The cadmium ion-imprinted polymer provided in this example adop...

Embodiment 2

[0029] Adsorption Capacity of Cadmium Ion-imprinted Polymers

[0030] Accurately weigh multiple 100 mg cadmium ion-imprinted polymers into a 15 mL centrifuge tube, add 10 mL of cadmium ion solutions (100-600 μg / ml) with different concentrations, shake for 0.5 h, centrifuge, and use an atomic absorption spectrometer to measure the supernatant The concentration of cadmium ions in the solution. (like figure 1 Shown) The results show that the saturated adsorption capacity of cadmium (II) ion-imprinted polymer is 107.97 μg / mg, which has good adsorption performance.

Embodiment 3

[0032] Enrichment fold determination

[0033] The cadmium ion-imprinted polymer prepared in the example was loaded into a solid phase extraction column, and the enrichment performance of the cadmium ion-imprinted polymer on cadmium ions was investigated under different sample volume conditions. In the experiment, increase the volume of the sample solution, and keep the total amount of cadmium ions at 100 μg, pass through the column separately under the optimal adsorption conditions, and use 10ml of elution reagent for elution, collect the eluate, and then pass through the column for cadmium ions The determination of the recovery rate was used to study the enrichment factor. The results are shown in Table 1. When the sample volume was 1000ml, the recovery rate of cadmium ions was 91.9%, indicating that the cadmium ion-imprinted polymer had a good enrichment ability for cadmium ions, and its enrichment factor was 100.

[0034] Table 1 Enrichment test of cadmium ion-imprinted po...

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Abstract

The invention discloses a preparation method of a cadmium ion imprinted material and the application thereof. The preparation method comprises the following steps: 1, mixing 1mmol of cadmium chlorideand 1-6mmol of a surfactant micelle with 1mol of high-purity water, and stirring at a room temperature for 1h to obtain a solution; 2, adding 1-6mmol of a functional monomer in the solution in the step 1, and stirring at a room temperature for 1h to form a cadmium ion complex, wherein the functional monomer is 3-mercaptopropyltrimethoxysilane; 3, dissolving 10-20 mmol of tetraethyl orthosilicate in 2-10ml of methanol, mixing with the complex prepared in the step 2, magnetically stirring at a room temperature for 24-48h, and then reacting in a 90 DEG C water bath for 24h to form a polymer; 4, extracting the polymer formed in the step 3 in an ethanol solution for 24 hours, then washing by using a hydrochloric acid solution with the concentration of 1mol / L for multiple times until no cadmiumions are detected in an eluate, finally washing by using the high-purity water until a neutral state, and drying in a drying oven. The cadmium ion imprinted polymer prepared by the preparation methodprovided by the invention adopts a molecular imprinting technology and has specific selectivity for cadmium ions.

Description

technical field [0001] The invention relates to a preparation method of a cadmium ion imprinted material and its application, and belongs to the technical field of the preparation method of a cadmium ion imprinted material and its application. Background technique [0002] Heavy metal pollution is different from other organic pollution. Heavy metals are enriched and difficult to degrade in the environment. For example, heavy metals discharged with wastewater, even if the content is very low, will accumulate in algae and sediment, be absorbed by fish and shellfish, produce food chain concentration, and cause public nuisance. Cadmium is one of the most toxic heavy metal elements, even at very low concentration levels, it can affect human beings and health. The International Agency for Research on Cancer (IRAC, 1993) classifies cadmium as a human carcinogen. Due to the harm of cadmium pollutants to humans and animals, many relevant management regulations have been issued at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D15/08
CPCB01D15/08B01J20/268B01J20/28016
Inventor 康澍王利平王倩兰天
Owner BEIJING PURKINJE GENERAL INSTR
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