Copper-ion-imprinted composite adsorbing material and preparation method thereof

A technology of composite adsorption materials and copper ions, which is applied in chemical instruments and methods, adsorption of water/sewage treatment, alkali metal compounds, etc., can solve the problems of decreased adsorption capacity of metal ions, improve stability, increase adsorption, and improve acid resistance sexual effect

Inactive Publication Date: 2018-06-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to overcome the shortcoming that chitosan is easily acid-soluble as a functional monomer and the adsorption capacity of metal io...

Method used

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  • Copper-ion-imprinted composite adsorbing material and preparation method thereof
  • Copper-ion-imprinted composite adsorbing material and preparation method thereof
  • Copper-ion-imprinted composite adsorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) 0.9g chitosan was dissolved in 30mL, 1% (w / v) acetic acid solution, and ultrasonically degassed for 30min;

[0041] (2) 0.3g sodium carboxymethylcellulose is dissolved in 60mL, 0.5mol / L sodium hydroxide solution to obtain sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid;

[0042] (3) drip the chitosan acetic acid solution that step (1) makes into the sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid that step (2) makes with syringe, obtain even and complete chitosan / Sodium carboxymethylcellulose composite gel microspheres, let stand for 30min, then take out the gel microspheres and wash with water until neutral;

[0043] (4) Place the gel microspheres prepared in step (3) in 40 mL of an aqueous solution containing 0.25 g of copper chloride, shake the imprint at 30 ° C for 12 h, and then wash with water to remove residual Cu 2+ ;

[0044] (5) Place the gel microspheres prepared in step (4) in 40 mL of 0.66% glutar...

Embodiment 2

[0061] (1) 0.9g chitosan was dissolved in 30mL, 1% (w / v) acetic acid solution, and ultrasonically degassed for 30min;

[0062] (2) 0.3g sodium carboxymethylcellulose is dissolved in 60mL, 0.5mol / L sodium hydroxide solution to obtain sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid;

[0063] (3) drip the chitosan acetic acid solution that step (1) makes into the sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid that step (2) makes with syringe, obtain even and complete chitosan / Sodium carboxymethylcellulose composite gel microspheres, let stand for 30min, then take out the gel microspheres and wash with water until neutral;

[0064] (4) Place the gel microspheres prepared in step (3) in 40 mL of an aqueous solution containing 0.17 g of copper nitrate, shake the imprint at 30 ° C for 12 h, and then wash with water to remove residual Cu 2+ ;

[0065] (5) Place the gel microspheres prepared in step (4) in 40 mL of 1.19% gluta...

Embodiment 3

[0069] (1) 0.9g chitosan was dissolved in 30mL, 1% (w / v) acetic acid solution, and ultrasonically degassed for 30min;

[0070] (2) 0.3g sodium carboxymethylcellulose is dissolved in 60mL, 0.5mol / L sodium hydroxide solution to obtain sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid;

[0071] (3) drip the chitosan acetic acid solution that step (1) makes into the sodium carboxymethylcellulose / sodium hydroxide composite coagulation liquid that step (2) makes with syringe, obtain even and complete chitosan / Sodium carboxymethylcellulose composite gel microspheres, let stand for 30min, then take out the gel microspheres and wash with water until neutral;

[0072] (4) Place the gel microspheres prepared in step (3) in 40 mL of an aqueous solution containing 0.42 g of copper sulfate, shake the imprint at 30 ° C for 12 h, and then wash with water to remove residual Cu 2+ ;

[0073] (5) Place the gel microspheres prepared in step (4) in 40 mL of 1.46% gluta...

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Abstract

The invention discloses a copper-ion-imprinted composite adsorbing material and a preparation method thereof. The preparation process comprises the following steps: respectively preparing chitosan acetic acid solution and sodium carboxymethyl cellulose/sodium hydroxide composite solidifying liquid, dripping the chitosan acetic acid solution into the sodium carboxymethyl cellulose/sodium hydroxidecomposite solidifying liquid to form spheres, placing into Cu<2+> for imprinting after washing, then using glutaraldehyde for crosslinking, then carrying out elution by using acid to remove Cu<2+>, washing and drying to obtain the copper-ion-imprinted composite adsorbing material. The copper-ion-imprinted composite adsorbing material prepared by the invention is millimeter-scale gel microspheres with uniform size, has good selective adsorption capacity for Cu<2+>, and can be recycled repeatedly; the raw materials are from natural polymers, so that no secondary pollution is caused; the preparation process is simple, the energy consumption is low, and the environment-friendly effect is achieved, so that the copper-ion-imprinted composite adsorbing material can be widely applied to treatmentof waste water and waste liquor containing copper ions.

Description

technical field [0001] The invention belongs to the field of adsorption functional materials, and in particular relates to a copper ion imprinted composite adsorption material and a preparation method thereof. Background technique [0002] Copper is often contained in wastewater discharged from industrial production processes such as metal smelting, batteries, printing and dyeing, which causes serious water pollution and poses a great threat to human living environment and health. At present, the methods for removing heavy metal ions such as copper ions from wastewater mainly include chemical precipitation, membrane filtration, ion exchange, electrochemical methods, etc., but these methods have their own shortcomings, such as poor treatment effect, high treatment cost, The process is complicated, etc. Adsorption, as an effective separation technology, has the advantages of high separation efficiency, simple operation, and easy recovery of separated products, and has broad a...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/28004B01J20/28019B01J20/28047C02F1/286C02F2101/20
Inventor 李晓陈玉宝张卫英袁喆冒娇娇
Owner FUZHOU UNIV
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