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Bifunctional material for detecting and adsorbing copper ions, its synthesis method and application

A dual-functional material, copper ion technology, applied in the field of copper ion detection, can solve the problems of inability to simultaneously achieve rapid detection of copper ions, limited adsorption capacity, difficult recovery, etc., achieve rapid detection and quantitative analysis, broad industrial application prospects, sensitive The effect of selective response

Active Publication Date: 2019-07-12
ANQING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reported copper ion adsorbents mainly include agricultural wastes, inorganic nanomaterials, organic polymers, etc. These copper ion adsorbents have the following disadvantages: (1) The adsorption capacity of agricultural wastes is limited, and they tend to The organic matter is released, causing the chemical oxygen demand (COD) of the water body to increase; (2) Nanomaterial adsorbents are difficult to recycle because of their small particles, which is not conducive to recycling
(3) Organic high molecular polymers have poor water solubility and can only be used in organic solvents or mixed solutions of organic solvents and water; (4) can only absorb and remove copper ions, and cannot simultaneously achieve rapid detection of copper ions
Currently, there are few reports on bifunctional materials for the detection and adsorption of copper ions in water

Method used

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  • Bifunctional material for detecting and adsorbing copper ions, its synthesis method and application
  • Bifunctional material for detecting and adsorbing copper ions, its synthesis method and application
  • Bifunctional material for detecting and adsorbing copper ions, its synthesis method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: Synthetic bifunctional material

[0027] figure 1 It is the chemical reaction route diagram of synthesizing bifunctional material in the present embodiment, as figure 1 As shown, the specific process is as follows:

[0028] (1) Weigh 2.0g sodium alginate (viscosity: 200±20mPa·s) and dissolve it in 98.0g pH5.5 MES (2-(N-morpholine)ethanesulfonic acid) buffer solution, and add 0.15 g 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 0.12g N-hydroxysuccinimide and 3.0g carboxylated chitosan were reacted at 25°C for 6h to prepare get the mixture;

[0029] (2) Under stirring conditions, use a 10mL medical syringe to drop the mixed solution prepared in step (1) into 500mL0.25mol / L calcium nitrate solution drop by drop, continue stirring for 30 minutes after dropping, filter, wash with distilled water, and prepare Obtain calcium alginate-chitosan hydrogel;

[0030] (3) Soak the calcium alginate-chitosan hydrogel prepared in step (2) in distilled wa...

Embodiment 2

[0031] Embodiment 2: Synthetic bifunctional material

[0032] (1) Weigh 2.0g of potassium alginate and dissolve it in 98.0g of MES (2-(N-morpholine)ethanesulfonic acid) buffer solution with pH 5.5, and add 0.15g of 1-ethyl-(3-di Methylaminopropyl) carbodiimide hydrochloride, 0.12g N-hydroxysuccinimide and 3.0g carboxylated chitosan were reacted at 25°C for 6h to obtain a mixed solution;

[0033] (2) Under stirring conditions, use a 10mL medical syringe to drop the mixed solution prepared in step (1) into 500mL0.25mol / L calcium nitrate solution drop by drop, continue stirring for 30 minutes after dropping, filter, wash with distilled water, and prepare Obtain calcium alginate-chitosan hydrogel;

[0034] (3) Soak the calcium alginate-chitosan hydrogel prepared in step (2) in distilled water, place it in a vacuum freeze dryer to freeze, and dry in vacuum to obtain a bifunctional material.

[0035] The difference between Example 2 and Example 1 is that sodium alginate is replace...

Embodiment 3

[0036] Embodiment 3: Synthetic bifunctional material

[0037] (1) Weigh 2.0 g of alginic acid and dissolve it in 98.0 g of MES (2-(N-morpholine) ethanesulfonic acid) buffer solution with pH 5.5, and add 0.15 g of 1-ethyl-(3-dimethyl Aminopropyl) carbodiimide hydrochloride, 0.12g N-hydroxysuccinimide and 3.0g carboxylated chitosan were reacted at 25°C for 6h to obtain a mixed solution;

[0038] (2) Under stirring conditions, use a 10mL medical syringe to drop the mixed solution prepared in step (1) into 500mL0.25mol / L calcium nitrate solution drop by drop, continue stirring for 30 minutes after dropping, filter, wash with distilled water, and prepare Obtain calcium alginate-chitosan hydrogel;

[0039] (3) Soak the calcium alginate-chitosan hydrogel prepared in step (2) in distilled water, place it in a vacuum freeze dryer to freeze, and dry in vacuum to obtain a bifunctional material.

[0040] The difference between Example 3 and Example 1 is that sodium alginate is replaced ...

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Abstract

The invention discloses a method for synthesizing a bifunctional material for detecting and adsorbing copper ions. Biocompatible alginate and chitosan are used as raw materials to combine them through the condensation reaction of carboxyl and amino groups. The bifunctional material is prepared by gelling in an alkaline earth metal ion solution and drying. The invention also discloses the bifunctional material and its application. The bifunctional material can quickly detect copper ions in water and has high sensitivity to copper ions , high adsorption rate, and recyclable, suitable for rivers and lakes water quality investigation, enterprise factory drainage water quality monitoring and domestic water, food, human and animal blood and body fluids, and various water samples obtained by processing various solid samples. Detection and treatment , has wide application value.

Description

technical field [0001] The invention belongs to the field of copper ion detection, and in particular relates to a dual-functional material for detecting and adsorbing copper ions, a synthesis method and application thereof. Background technique [0002] Copper is one of the essential trace elements for the human body, but excessive copper can cause liver damage and lung cancer, so the national drinking water hygiene standard stipulates that the copper content in drinking water must be less than 1.0mg / L. Copper ions in water mainly come from copper mining and smelting, electroplating and electrical industry. It is of great significance to develop functional materials that can quickly detect and adsorb and remove copper ions in water. [0003] At present, the detection of copper ions in water is mainly realized by colorimetric detection of gold or silver nanoparticle solution and instrument detection. The colorimetric detection of gold or silver nanoparticle solution is simpl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28B01J20/30G01N21/78C02F101/20
CPCB01J20/24B01J20/28047C02F1/286C02F2101/20G01N21/78G01N2021/775
Inventor 吴根华汪竹青王敏
Owner ANQING NORMAL UNIV
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