Uranium extracting adsorption material taking cotton cloth as carrier and preparation method thereof
The technology of adsorption material and cotton cloth is applied in the field of uranium adsorption material, which can solve the problems of difficult recovery and low adsorption efficiency, and achieve the effect of easy recovery and good adsorption.
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[0024] The preparation method of the uranium extraction adsorption material with cotton cloth as the carrier of the present invention mainly comprises: dissolving sodium hypophosphite and citric acid with a mass ratio of 1:1-1:5 in deionized water, so that the total mass concentration of the two is 1.0%-10.0%, to prepare modified liquid. Then soak the absorbent cotton cloth in the solution at room temperature and let it stand for 10-100 minutes. After taking it out, squeeze off part of the liquid, and the excess rate is 10%-50%. Dry at 50°C for 2h and bake at 120°C for 5min.
[0025] The modified cotton cloth is transferred together with the culture solution to a reaction kettle with polytetrafluoroethylene, and left to react at 80-120° C. for 8-16 hours. After cooling, the prepared material is fully washed with deionized water and dried. Due to the different types of coated metal alkali carbonates, the composition of the culture solution is different. The culture fluid of on...
Embodiment 1
[0037] (1) Dissolve 2.0 g of sodium hypophosphite and 3.0 g of citric acid in 95 mL of deionized water, and stir the solution at room temperature until it becomes clear to obtain a carboxyl modified solution. Then, 1.0 g of absorbent cotton was placed in the carboxyl-modified liquid for 60 minutes, and 50% of the liquid was removed after taking it out. Dry at 50°C for 2 hours, and bake at 120°C for 5 minutes.
[0038] from figure 1 It can be seen that the cotton cloth modified by carboxyl groups has a wave number of 1741cm. -1 The strong peaks that appear are C-O symmetric and asymmetric stretching vibration peaks; at the wavenumber of 1409 cm -1 ,1596cm -1 ,1630cm -1 The peaks that appear are the symmetric and asymmetric stretching vibration peaks of the carboxylate ion. It shows that citric acid has been successfully grafted to cotton.
[0039] (2) Dissolve 5.13 g of magnesium nitrate and 2.4 g of urea in 100 mL of deionized water, and stir the solution at room tempera...
Embodiment 2
[0042] (1) Dissolve 2.0 g of sodium hypophosphite and 4.0 g of citric acid in 94 mL of deionized water, and stir the solution at room temperature until it becomes clear to obtain a carboxyl modified solution. Then, 1.0 g of absorbent cotton was placed in the carboxyl-modified liquid for 30 minutes, and 60% of the liquid was removed after taking out. Dry at 50°C for 2 hours, and bake at 120°C for 5 minutes.
[0043] (2) Dissolve 5.13 g of magnesium nitrate, 3.75 g of aluminum nitrate and 2.4 g of urea in 100 mL of deionized water, and stir the solution at room temperature until it becomes clear to prepare a culture solution. Then, 0.5 g of the carboxyl-modified cotton cloth and the culture solution were transferred to a reaction kettle with polytetrafluoroethylene, and the reaction was allowed to stand at 110° C. for 12 h. After cooling, the prepared material was thoroughly washed with deionized water and dried.
[0044] from image 3 It can be seen that the diffraction peak...
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