Modified nonwoven fabric capable of quickly adsorbing heavy metal ions and preparation method thereof

A technology for adsorbing heavy metals and non-woven fabrics. It is applied in the fields of alkali metal compounds, chemical instruments and methods, and adsorption water/sewage treatment. It can solve the problems of long adsorption equilibrium time, low adsorption capacity of heavy metal ions, and small specific surface area of ​​ordinary fibers. problems, to achieve the effect of fast adsorption speed, large adsorption capacity and short adsorption equilibrium time

Inactive Publication Date: 2018-11-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary fibers have disadvantages such as small specific surface area, low adsorption capacity for heavy metal ions, and long time to reach adsorption equilibrium.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Modified nonwoven fabric capable of quickly adsorbing heavy metal ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of the modified non-woven fabric that fast absorbs heavy metal ion, concrete implementation steps are as follows:

[0032] (1) 2g polypropylene nonwoven fabric (gram weight 60g / m 2 , thickness 295 μm) was treated with ethanol ultrasonic vibration to remove organic impurities on the surface, and then dried;

[0033] (2) Preparation of buffer solution

[0034] Prepare a tris(hydroxymethyl)aminomethane hydrochloride buffer solution whose pH is 8.0 with a concentration of 0.01mol / L;

[0035] (3) Based on the total weight of the modified solution, 0.2wt% catechol and 0.2wt% diethylenetriamine were dissolved in the buffer solution to prepare a modified solution with a volume of 300ml;

[0036] (4) Soak the polypropylene nonwoven fabric of step (1) in the modified solution for 10 hours to obtain the modified nonwoven fabric;

[0037] (5) Wash and dry the modified nonwoven fabric.

[0038] Wherein the modified nonwoven fabric in the step (5) is ...

Embodiment 2

[0040] A kind of preparation method of the modified non-woven fabric that fast absorbs heavy metal ion, concrete implementation steps are as follows:

[0041] (1) 2g polyester nonwoven fabric (gram weight 70g / m 2 , thickness 395 μm) was treated with ethanol ultrasonic vibration to remove organic impurities on the surface, and then dried;

[0042] (2) Preparation of buffer solution

[0043] Prepare a tris(hydroxymethyl)aminomethane hydrochloride buffer solution whose pH is 8.0 with a concentration of 0.01mol / L;

[0044] (3) Based on the total weight of the modified solution, 0.2wt% dopamine and 0.4wt% diethylenetriamine were dissolved in the buffer solution to prepare a modified solution with a volume of 300ml;

[0045] (4) Soak the polyester nonwoven fabric in step (1) in the modification solution for 24 hours to obtain the modified nonwoven fabric;

[0046] (5) Wash and dry the modified nonwoven fabric.

[0047] Wherein in step (5), the modified nonwoven fabric is cleaned...

Embodiment 3

[0049] A kind of preparation method of the modified non-woven fabric that fast absorbs heavy metal ion, concrete implementation steps are as follows:

[0050] (1) 2g nylon non-woven fabric (gram weight 60g / m 2 , with a thickness of 255 μm) was treated with ultrasonic vibration of ethanol to remove organic impurities on the surface, and then dried;

[0051] (2) Preparation of buffer solution

[0052] Prepare a tris(hydroxymethyl)aminomethane hydrochloride buffer solution whose pH is 8.5 with a concentration of 0.01mol / L;

[0053] (3) Based on the total weight of the modified solution, 0.4wt% dopamine and 0.8wt% polyethyleneimine were dissolved in a buffer solution to prepare a modified solution with a volume of 300ml;

[0054] (4) Soak the nylon nonwoven fabric of step (1) in the modification solution, and soak for 24 hours to obtain the modified nonwoven fabric;

[0055] (5) Wash and dry the modified nonwoven fabric.

[0056]Wherein in step (5), the modified nonwoven fabri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a modified nonwoven fabric capable of quickly adsorbing heavy metal ions. The modified nonwoven fabric comprises a substrate and a modifier, wherein the surface of the substrateis loaded with a modifying agent; the substrate comprises a nonwoven fabric; the modifying agent comprises a copolymer of catechol monomer and polyamine monomer. The modified nonwoven fabric capableof quickly adsorbing the heavy metal ions and the preparation method have the advantages that the contact area of the modified nonwoven fabric is large, the adsorption amount of heavy metals is high,the adsorption is quick and effective, and the good repeated use effect is realized; the preparation method is simple and effective, the cost is low, the operation is simple, and the pollution and destroy to environment are avoided.

Description

technical field [0001] The invention belongs to the field of material chemical industry, and in particular relates to a modified non-woven fabric which rapidly absorbs heavy metal ions and a preparation method thereof. Background technique [0002] With China's rapid industrialization and urbanization, industries such as electroplating, metallurgy, leather, and chemicals have also developed rapidly. However, during the development of these industries, a large amount of wastewater containing heavy metal ions is discharged to the environment through various channels. In this process, the heavy metal burden on the environment has been increased, resulting in serious water heavy metal pollution. These heavy metal ions are not easy to be metabolized in the biological chain and are easy to be enriched by organisms, which seriously threaten the survival of human beings and aquatic organisms. At present, the treatment methods of heavy metal ions in water mainly include: chemical pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/265B01J20/28038B01J20/30C02F1/285C02F2101/20
Inventor 魏俊富孔志云秦志张环邹凯健张天烨李智峰
Owner TIANJIN POLYTECHNIC UNIV
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