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
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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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