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Preparation of magnetically separable cyclodextrin organic phosphonic acid inclusion compound and application of inclusion compound in heavy metal ions in industrial wastewater

An organic phosphonic acid and cyclodextrin technology, which is applied in the field of nanomaterials and heavy metal adsorption, can solve problems such as difficult modification, and achieve the effect of small environmental impact, convenient and quick recycling and recycling.

Inactive Publication Date: 2017-06-30
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most organic phosphonic acids are difficult to modify
[0005] So far, the Fe 3 o 4 The combination of nanoparticles and organic phosphonic acid for mercury ion adsorption has not been reported

Method used

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  • Preparation of magnetically separable cyclodextrin organic phosphonic acid inclusion compound and application of inclusion compound in heavy metal ions in industrial wastewater
  • Preparation of magnetically separable cyclodextrin organic phosphonic acid inclusion compound and application of inclusion compound in heavy metal ions in industrial wastewater
  • Preparation of magnetically separable cyclodextrin organic phosphonic acid inclusion compound and application of inclusion compound in heavy metal ions in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of Fe by solvothermal method 3 o 4 nanoparticles

[0033] FeCl 3 ·6H 2 O (1 g) was dissolved in ethylene glycol (20 mL), followed by the addition of CH 3 COONa (3 g) and 1,2-ethylenediamine (10 mL). The mixture was stirred vigorously for 30 minutes and then sealed into a stainless steel autoclave with a Teflon liner. The reaction was continued at 200° C. for 8 h, and the resulting black substance was washed with water several times after cooling to room temperature.

[0034] (2) Fe 3 o 4 Preparation of @CD

[0035] Will Fe 3 o 4 (0.5g) and sodium dodecylbenzenesulfonate (1g) were added to the NaOH solution (0.01mol·L -1 , 50mL), sonicate for 20min, add dropwise an appropriate amount of epichlorohydrin and react at 80°C for 24h. After the reactant was cooled to room temperature, the pH was adjusted to 4-6 with HCl, the modified nanoparticles were magnetically separated, washed with deionized water several times to remove unreacted CM-β-CD, and...

Embodiment 2

[0042] (1) Preparation of Fe by solvothermal method 3 o 4 nanoparticles

[0043] FeCl 3 ·6H 2 O (1 g) was dissolved in ethylene glycol (20 mL), followed by the addition of CH 3 COONa (3 g) and 1,2-ethylenediamine (10 mL). The mixture was stirred vigorously for 30 minutes and then sealed into a stainless steel autoclave with a Teflon liner. The reaction was continued at 200° C. for 8 h, and the resulting black substance was washed with water several times after cooling to room temperature.

[0044] (2) Fe 3 o 4 Preparation of @CD

[0045] Will Fe 3 o 4 (0.5g) and sodium dodecylbenzenesulfonate (1g) were added to the NaOH solution (0.01mol·L -1 , 50mL), sonicate for 20min, add dropwise an appropriate amount of epichlorohydrin and react at 80°C for 24h. After the reactant was cooled to room temperature, the pH was adjusted to 4-6 with HCl, the modified nanoparticles were magnetically separated, washed several times with deionized water to remove unreacted CM-β-CD, and...

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Abstract

The invention discloses preparation of a magnetically separable cyclodextrin organic phosphonic acid inclusion compound and an application of the inclusion compound in heavy metal ions in industrial wastewater. The method comprises the steps: adding Fe3O4 nanoparticles and sodium dodecyl benzene sulfonate to a NaOH solution dissolved with carboxymethyl-beta-cyclodextrin, and carrying out ultrasonic treatment to obtain a mixed solution; dropwise adding epoxy chloropropane to the mixed solution to obtain a reactant; carrying out magnetic separation of the reactant, and carrying out vacuum drying to obtain a product; and then carrying out ultrasonic dispersion of the product in deionized water, adding PBTCA, and continuing to carry out ultrasonic treatment for 4-6 h under a condition of room temperature, to obtain the cyclodextrin organic phosphonic acid inclusion compound. The magnetic nano material synthesized with Fe3O4 nanoparticles as a carrier can solve the problem successfully, the strong chelating effect of organic phosphonic acid can be used for collecting heavy metal ions in an aqueous solution, moreover, adsorbed magnetic nanoparticles can be rapidly removed from the solution under an action of an external magnetic field, the adsorption material can be conveniently and quickly recycled and reused, and at the same time, the inclusion compound has little influence on the environment, and is green and environmentally friendly.

Description

technical field [0001] The invention relates to the field of nanomaterials and heavy metal adsorption, in particular to the preparation of a magnetically separable cyclodextrin organic phosphonic acid clathrate and its application in heavy metal ions in industrial wastewater. Background technique [0002] With the rapid development of the global economy and industry, a large amount of industrial sewage has brought a huge impact on the health and stability of the natural environment. As a common and abundant pollutant in industrial wastewater, Hg 2+ Not only is it highly toxic and difficult to biodegrade, but it can also be converted into more toxic methylmercury through biochemical reactions, so that it can be absorbed by aquatic organisms and enter the food chain. In 1956, the "Minamata disease" that caused a sensation in Japan was caused by the intake of methylmercury. [0003] In order to effectively treat industrial wastewater and reduce the mercury content of wastewat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/24B01J20/28009C02F1/288C02F2101/20
Inventor 王长权石立红
Owner YANGTZE UNIVERSITY
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