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Modified polyacrylonitrile fiber used for absorbing cadmium ions and preparation method thereof

A polyacrylonitrile fiber and cadmium ion technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the sky-high cost of soil pollution restoration and increase the cost of environmental protection and governance , social stability, cost increase and other issues, to achieve the effect of short reaction time, long life and simple preparation method

Inactive Publication Date: 2014-09-10
QINGDAO KEWEIYUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Frequent outbreaks of pollution accidents have caused heavy losses, not only increasing the cost of environmental protection and treatment, but also greatly increasing the cost of social stability, and the cost of soil pollution restoration is sky-high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 2 parts by weight of polyacrylonitrile fibers into the solution of hexamethylenediamine, the mass ratio of polyacrylonitrile fibers and hexamethylenediamine is 1:25, heat to 100°C, and react for 2 hours under constant stirring, stop stirring, and cool down To 80 ℃, let it stand at constant temperature for 2 hours, take out the polyacrylonitrile fiber, cool to room temperature, rinse with deionized water until pH = 6.8, and dry to obtain the modified polyacrylonitrile fiber that can absorb cadmium ions in the soil.

Embodiment 2

[0016] Add 2 parts by weight of polyacrylonitrile fibers into the hexamethylenediamine solution, the mass ratio of polyacrylonitrile fibers and hexamethylenediamine is 1:25, heat to 120°C, and react for 2 hours under constant stirring, stop stirring, and cool down To 80°C, let stand at constant temperature for 2.5 hours, take out the polyacrylonitrile fiber, cool to room temperature, rinse with deionized water until pH = 7, and dry to obtain the modified polyacrylonitrile fiber that can absorb cadmium ions in the soil.

Embodiment 3

[0018] Add 2 parts by weight of polyacrylonitrile fibers into the hexamethylenediamine solution, the mass ratio of polyacrylonitrile fibers and hexamethylenediamine is 1:25, heat to 130°C, and react for 2 hours under constant stirring, stop stirring, and cool down To 80 ℃, stand at constant temperature for 3 hours, take out the polyacrylonitrile fiber, cool to room temperature, rinse with deionized water until pH = 7.2, and dry to obtain the modified polyacrylonitrile fiber that can absorb cadmium ions in the soil.

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PUM

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Abstract

The invention relates to a modified polyacrylonitrile fiber used for absorbing cadmium ions in soil. The objective of the invention is to prepare the modified polyacrylonitrile fiber capable of high-efficiency absorption of cadmium ions in soil. According to a technical scheme in the invention, a preparation method comprises the following steps: adding 2 parts by weight of a polyacrylonitrile fiber into a hexylenediamine solution, wherein a mass ratio of the polyacrylonitrile fiber to hexylenediamine is 1: 25; heating the obtained mixture to 100 to 160 DEG C and carrying out a reaction for 2 h under continuous stirring; stopping stirring, carrying out cooling to 80 DEG C and then carrying out standing at a constant temperature for 2 to 3 h; taking the polyacrylonitrile fiber out, cooling the polyacrylonitrile fiber to room temperature and rinsing the polyacrylonitrile fiber with deionized water until a pH value is 6 to 7.5; and drying the polyacrylonitrile fiber so as to obtain the modified polyacrylonitrile fiber capable of absorbing cadmium ions in soil.

Description

technical field [0001] The invention relates to the field of heavy metal ion adsorption, in particular to a modified polyacrylonitrile fiber for adsorbing cadmium ions and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's industrialization, the earth has been continuously damaged by various pollutions. At present, the current situation of land pollution in our country is severe, and the causes of formation are very complicated. The accumulated pollution is evolving into frequent outbreaks of pollution accidents. [0003] Frequent outbreaks of pollution accidents have caused heavy losses, not only increasing the cost of environmental protection and treatment, but also greatly increasing the cost of social stability, and the cost of soil pollution restoration is sky-high. [0004] Existing heavy metal treatment technologies have relatively stringent requirements, are generally liquid, and have strict requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B09B1/00
Inventor 不公告发明人
Owner QINGDAO KEWEIYUAN ENVIRONMENTAL PROTECTION TECH