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Preparation method of cellulose aerogel with heavy metal ion adsorption and oil-water separation functions

A technology of cellulose aerogel and heavy metal ions, applied in the field of water environment treatment, can solve the problems of weak metal ion adsorption capacity, high cost, poor adsorption capacity, etc., achieve rapid adsorption of heavy metal ions and oil-water separation, and enhance oil-water separation capacity. , the effect of preventing the collapse of the structure

Inactive Publication Date: 2020-09-18
NANCHANG INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many problems in the use of traditional airgel adsorption materials in the field of wastewater treatment: high cost, complicated preparation process, excessive energy consumption, poor selective adsorption capacity and difficulty in recycling.
However, natural cellulose has very few surface active groups, and contains a large amount of impurities, surface colloids, pigments, etc., resulting in a weak adsorption capacity for metal ions.
In addition, the inherent strong hydrophilicity of cellulose makes aerogels prone to collapse and destroy their three-dimensional structure when in contact with aqueous solutions, thus limiting its application in oil-water separation.

Method used

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  • Preparation method of cellulose aerogel with heavy metal ion adsorption and oil-water separation functions
  • Preparation method of cellulose aerogel with heavy metal ion adsorption and oil-water separation functions

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The cellulose aerogel with heavy metal ion adsorption and oil-water separation functions of the present invention is prepared according to the following steps:

[0024] (1) Dilute 45 g of cellulose solution with a mass fraction of 0.9% to 80 g, ultrasonically disperse for 20 minutes, then add 0.1 g of tris, and stir for 30 minutes to form a stable suspension;

[0025] (2) Add 20 mL of absolute ethanol to 0.2 g of cardanol-derived siloxane, and after full contact, add 0.02 g of tannic acid to prepare a mixed solution of tannic acid and cardanol-derived siloxane; The mixed solution of tannic acid and cardanol-derived siloxane is added to the suspension described in step (1), and reacted at room temperature for 6 hours to obtain a mixture; wherein, the cardanol-derived siloxane is cardanol glyceryl ether KH550 (silane Coupling agent) obtains by epoxy ring opening, aftertreatment;

[0026] (3) Pour the mixture described in step (2) into a mold, and freeze-dry it in a freez...

Embodiment 2

[0028] The preparation steps are basically the same as in Example 1, the only difference being that the amount of cardanol-derived siloxane added is 0.4 g. The cellulose airgel obtained in this example with dual functions of heavy metal ion adsorption and oil-water separation is marked as TA / CDA-0.4.

Embodiment 3

[0030] The preparation steps are basically the same as in Example 1, the only difference being that the amount of cardanol-derived siloxane added is 0.6 g. The cellulose airgel obtained in this example with dual functions of heavy metal ion adsorption and oil-water separation is marked as TA / CDA-0.6.

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Abstract

The invention provides a preparation method of cellulose aerogel with heavy metal ion adsorption and oil-water separation functions, which comprises the following steps: (1) dispersing cellulose in water, adding trihydroxymethyl aminomethane, and stirring to form a suspension, (2) adding a mixed solution of tannic acid and cardanol-derived siloxane into the suspension, and reacting at room temperature for a period of time to obtain a mixture, and (3) pouring the mixture into a mold, and carrying out freeze drying to obtain the cellulose-based aerogel with double functions of heavy metal ion adsorption and oil-water separation. The cellulose aerogel with heavy metal ion adsorption and oil-water separation functions prepared by the method is used for treating wastewater containing heavy metal ions or oil.

Description

technical field [0001] The invention relates to the field of water environment treatment, in particular to an adsorption material capable of adsorbing heavy metal ions in water and separating oil from water and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of the economy and the acceleration of industrialization, more and more water bodies have been polluted to varying degrees. Among many pollutants, heavy metal wastewater and oily wastewater are two common pollution sources of water bodies, which have caused great harm to human health, water environment and ecological environment balance. At present, the treatment methods of heavy metal ions in water and oily wastewater mainly include: electrochemical method, biological method, adsorption method, membrane separation method, chemical precipitation method, etc. Among them, the adsorption method has attracted widespread attention at home and abroad because of its a...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/24B01J20/28B01D17/02C02F1/28C02F101/20
CPCB01J13/0091B01J20/28047B01J20/24C02F1/286B01D17/0202C02F2101/20
Inventor 张洁温英英张世锋蔡高堂王寅计勇
Owner NANCHANG INST OF TECH