Layer-by-layer self-assembled coating modified cotton fiber heavy metal ion adsorption material and preparation method thereof

A technology of layer-by-layer self-assembly and heavy metal ions, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of secondary pollution of the environment and difficulty in recycling, so as to avoid secondary pollution, Guarantee the adsorption efficiency and overcome the effect that is difficult to recover

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

AI Technical Summary

Problems solved by technology

However, after the metal ions are processed by these adsorbents, especially some micron-nano-sized adsorbents often cause secondary pollution to the environment due to the difficulty of recovery after the adsorption is completed.

Method used

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  • Layer-by-layer self-assembled coating modified cotton fiber heavy metal ion adsorption material and preparation method thereof
  • Layer-by-layer self-assembled coating modified cotton fiber heavy metal ion adsorption material and preparation method thereof
  • Layer-by-layer self-assembled coating modified cotton fiber heavy metal ion adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Cotton fiber adsorption material modified by polyethyleneimine / sodium alginate coating

[0031] A cotton fiber adsorption material is composed of a base material and a modification layer, the base material is cotton fiber, the modification layer includes more than one group of layer-by-layer self-assembled coatings, and the layer-by-layer self-assembled coatings are formed by electrostatic The layer-by-layer self-assembly method modifies the positively charged assembly layer and the negatively charged assembly layer on the surface of the substrate. In the modification layer, the number of layer-by-layer self-assembled coatings is 9 groups.

[0032] Its preparation method is:

[0033] (a) Preprocessing

[0034] The cotton fabric was placed in an aqueous solution containing 50 g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride and 36 g / L of sodium hydroxide, and stirred at 90 °C for 2 h. After the reaction is completed, the cotton fabric is taken out and washed ...

Embodiment 2

[0042] Cotton fiber adsorption material modified by chitosan / sodium polybenzenesulfonate coating

[0043] A cotton fiber adsorption material is composed of a base material and a modification layer, the base material is cotton fiber, the modification layer includes more than one group of layer-by-layer self-assembled coatings, and the layer-by-layer self-assembled coatings are formed by electrostatic The layer-by-layer self-assembly method modifies the positively charged assembly layer and the negatively charged assembly layer on the surface of the substrate. In the modification layer, the number of layer-by-layer self-assembled coatings is 20 groups.

[0044] Its preparation method is:

[0045] (a) Preprocessing

[0046] The cotton fabric was put into an aqueous solution containing 50g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride and 36g / L of sodium hydroxide, and stirred at 90°C for 2h. Take out and wash until neutral;

[0047] (b) Solution preparation

[0048...

Embodiment 3

[0054] Cotton fiber adsorption material modified by chitosan / sodium alginate coating

[0055] A cotton fiber adsorption material is composed of a base material and a modification layer, the base material is cotton fiber, the modification layer includes more than one group of layer-by-layer self-assembled coatings, and the layer-by-layer self-assembled coatings are formed by electrostatic The layer-by-layer self-assembly method modifies the positively charged assembly layer and the negatively charged assembly layer on the surface of the substrate. In the modification layer, the number of layer-by-layer self-assembled coatings is 9 groups.

[0056] Its preparation method is:

[0057] (a) Preprocessing

[0058] The cotton fabric was placed in an aqueous solution containing 50 g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride and 36 g / L of sodium hydroxide, and stirred at 90 °C for 2 h. After the reaction is completed, the cotton fabric is taken out and washed to neutra...

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PUM

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Abstract

The invention relates to a layer-by-layer self-assembled coating modified cotton fiber heavy metal ion adsorption material. The adsorption material consists of a base material and a modified layer, wherein the base material is cotton fibers, the modified layer comprises one or more groups of layer-by-layer self-assembled coatings, and the layer-by-layer self-assembled coating is an electropositiveassembled layer and an electronegative assembled layer which are modified on the surface of the base material by virtue of an electrostatic layer-by-layer self-assembled coating. The modified cottonfiber not only has higher adsorption efficiency, but also overcomes the problems that the existing heavy metal adsorption material is difficult to recycle in an aqueous solution after completing the adsorption, and is high in application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of novel heavy metal ion adsorbents, in particular to a cotton fiber heavy metal ion adsorption material modified by layers of self-assembled coatings and a preparation method thereof. Background technique [0002] Rapid industrialization has produced heavy metal pollution, in which the burning of fossil fuels, mining and smelting activities have exacerbated the intrusion of heavy metals into surface and groundwater bodies. Trace amounts of heavy metal ions in the environment can also cause harm to the ecological environment and human health. To reduce the negative effects of heavy metal ions in water bodies, many techniques, such as precipitation, chemical oxidation / reduction, membrane filtration, ion exchange, and adsorption, have been used to remediate heavy metals. Among these methods, adsorption has received more attention due to its high efficiency, technical flexibility and cost-effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/32C02F1/28C02F101/20
CPCB01J20/24B01J20/3231C02F1/286C02F2101/20
Inventor 潘颖葛景园赵红挺
Owner HANGZHOU DIANZI UNIV
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