Preparation method and using method of magnetic response aminated cellulose-based heavy metal adsorption material

An adsorption material and cellulose-based technology, which is applied in the field of preparation of magnetically responsive aminated cellulose-based heavy metal adsorption materials, can solve the problems of slow adsorption rate, poor regeneration effect, and difficult recovery of adsorbents, so as to improve adsorption performance and improve Adsorption rate and adsorption capacity, effect of increasing density

Pending Publication Date: 2018-11-30
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of the existing cellulose-based heavy metal adsorption materials such as slow adsorption rate of heavy metal ions, poor regeneration effect and difficult recovery of adsorbents, etc., to p...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. The preparation method is as follows:

[0032] (1) First crush the bagasse pulp cellulose, pass through a 200 mesh sieve, and mix NaOH / urea / H with a mass ratio of 7:12:81 2 After the O solution was mixed, it was frozen at -16°C for 8 hours to obtain an alkali urea solution; then the bagasse pulp cellulose and alkali urea solution were weighed at a mass ratio of 1:25, and the bagasse pulp cellulose was dissolved in In the alkali urea solution, a transparent cellulose solution was obtained;

[0033] (2) Add polyethyleneimine and Fe to the cellulose solution 3 o 4 , the molar ratio of the added polyethyleneimine to cellulose is 1:1, the added Fe 3 o 4 The dosage is 0.1% of the mass of cellulose, stir evenly, then slowly add epichlorohydrin with a molar ratio of 5:1 to cellulose, and react at room temperature for 2 hours to obtain modified cellulose;

[0034] (3) The temperature of the reaction system was adjusted to 50° C., and the stirring was continued for 2 hour...

Embodiment 2

[0040] 1. The preparation method is as follows:

[0041] (1) First crush the bamboo pulp cellulose, pass through a 200 mesh sieve, and mix LiOH / thiourea / H with a mass ratio of 7:12:81 2 After the O solution was mixed, it was frozen at -16°C for 8 hours to obtain an alkali urea solution; it was frozen at -16°C for 8 hours; then the bamboo pulp cellulose and alkali urea solution were weighed at a mass ratio of 1:25, and were Dissolve the cellulose in the alkali urea solution under high-speed stirring to obtain a transparent cellulose solution;

[0042] (2) Add polyamide and γ-Fe to the cellulose solution 2 o 3 , the molar ratio of the added polyamide to cellulose is 1:1, the added γ-Fe 2 o 3 The dosage is 0.1% of the mass of cellulose, stir evenly, then slowly add epichlorohydrin with a molar ratio of 5:1 to cellulose, and react at room temperature for 2 hours to obtain modified cellulose;

[0043] (3) The temperature of the system was adjusted to 70° C., and the stirring w...

Embodiment 3

[0049] 1. The preparation method is as follows:

[0050] (1) First crush the eucalyptus pulp cellulose, pass through a 200 mesh sieve, and mix NaOH / thiourea / H with a mass ratio of 7:12:81 2 After the O solution was mixed, it was frozen at -16°C for 8 hours to obtain an alkali urea solution; then the eucalyptus pulp cellulose and alkali urea solution were weighed at a mass ratio of 1:25, and the cellulose was dissolved in the alkali urea solution under high-speed stirring. In the urea solution, a transparent cellulose solution was obtained;

[0051] (2) Add branched polyethyleneimine and γ-Fe to the cellulose solution 2 o 3 , the molar ratio of the added branched polyethyleneimine to cellulose is 2:1, the added γ-Fe 2 o 3 The dosage is 0.1% of the cellulose mass, stir evenly, then slowly add glycidyl methacrylate with a molar ratio of 10:1 to the cellulose, and react at room temperature for 2 hours to obtain modified cellulose;

[0052] (3) The pH value of the system was a...

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PUM

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Abstract

The invention discloses a preparation method and a using method of a magnetic response aminated cellulose-based heavy metal adsorption material. The preparation method comprises the following steps: S1, crushing cellulose and dissolving the crushed cellulose in an alkali urea solution under stirring state to obtain a transparent cellulose solution; S2, adding an animation reagent and a superparamagnetic material into the cellulose solution, uniformly mixing, then adding a cross-linking agent and grafting the animation reagent to a cellulose chain to obtain modified cellulose; and S3, converting the modified cellulose from liquid state into solid state by adjusting reaction temperature and pH value of a modified cellulose system to obtain the magnetic response aminated cellulose-based heavymetal adsorption material. The magnetic response aminated cellulose-based heavy metal adsorption material prepared by the method has high amino density and magnetic response, is capable of rapidly carrying out solid-liquid separation in an externally-applied magnetic field, has a good effect of removing various heavy metals in water, has good regeneration property, and can be applied to the fieldof treatment of wastewater with heavy metals.

Description

technical field [0001] The invention relates to the technical field of adsorption materials, in particular to a preparation method of a magnetic response aminated cellulose-based heavy metal adsorption material and a method for using the same. Background technique [0002] Frequent incidents such as "cadmium rice", "blood lead", and "arsenic poisoning" have caused heavy metal pollution to make people feel precarious. Especially, heavy metal ion pollution in water bodies has many types, wide range, and easy diffusion, making it difficult to control. ,high cost. Heavy metal ion pollution in water mainly includes mercury (Hg), nickel (Ni), copper (Cu), lead (Pb), arsenic (As), chromium (Cr), cadmium (Cd), etc., which mainly come from mining, metallurgy, Machinery manufacturing, chemical industry, electronics and other industrial wastewater. These heavy metal ions cannot be degraded by microorganisms in water bodies, and can only migrate and transform between water, substrates...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/48C02F101/20C02F101/22
CPCB01J20/06B01J20/267B01J20/28009C02F1/288C02F1/488C02F2101/20C02F2101/22
Inventor 朱红祥李云华何辉孙琢黄闻宇侯燕萍程梅笑薛飞
Owner GUANGXI UNIV
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