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Method for enriching micro sliver irons by utilizing melamine modified urea resin

A technology of urea-formaldehyde resin and melamine, which is applied in separation methods, chemical instruments and methods, measuring devices, etc., can solve the problems of inconvenient strain cultivation, low adsorption capacity, unsuitable use, etc., and achieves cheap raw materials, easy availability of raw materials, and processing effects. excellent effect

Inactive Publication Date: 2017-04-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of natural adsorbents such as diatomite, bentonite, zeolite, activated carbon and other inorganic adsorbents has the disadvantage of being difficult to reduce volume when adsorbing silver ions, and the adsorption capacity is not high (Condomitti U, Silveira A T, Condomitti G W, et al.Silver recovery using electrochemically active magnetite coated carbon particles. Hydrometallurgy.)
The use of biological adsorption methods such as Lactobacillus A09 is inconvenient for strain cultivation, although the adsorption capacity is high, but it is not suitable for use in actual production (Fu Jinkun, Liu Yueying, Gu Pingying, etc. Spectroscopy of Lactobacillus A09 Adsorption and Reduction of Ag(I) Characterization. Acta Physicochemical Sinica.)

Method used

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  • Method for enriching micro sliver irons by utilizing melamine modified urea resin
  • Method for enriching micro sliver irons by utilizing melamine modified urea resin
  • Method for enriching micro sliver irons by utilizing melamine modified urea resin

Examples

Experimental program
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Effect test

Embodiment 1

[0018] MUF resin is used as an adsorbent to adsorb silver ions in a solution containing silver ions. Adsorption was carried out on a constant temperature shaker. Take 6 groups of silver ion-containing solutions with different initial pH values ​​(pH value 1-6), the initial concentration of silver ions in the solution is 100mg / L, and the volume is 100mL, then add 0.1g of MUF resin respectively, and the adsorption temperature is 25°C , after adsorption for 24h, measure the adsorption capacity of each group of MUF resins to silver ions, the results are as follows figure 1 shown. When the initial pH value is 1, the measured adsorption capacity of MUF resin to silver ions is 24.43 mg / g; when the initial pH value is 4, the adsorption capacity of MUF resin to silver ions is 27.41 mg / g; when the initial pH value is 6 , The measured adsorption capacity of MUF resin to silver ions is 26.15mg / g. from figure 1 It can be seen that the adsorption effect of MUF resin on silver ions is th...

Embodiment 2

[0020] MUF resin is used as an adsorbent to adsorb silver ions in a solution containing silver ions. Adsorption was carried out on a constant temperature shaker. The initial concentration of silver ions in the solution is 125mg / L, the volume is 100mL, and the initial pH value is 4. Add 0.1g of MUF resin, the adsorption temperature is 25°C, and the adsorption time is 5min, 10min, 20min, 30min, 40min, 50min, 60min, measure the adsorption capacity of MUF resin to silver ion, the result is as follows figure 2 shown. from figure 2 It can be seen that the adsorption effect of MUF resin on silver ions increases with time, and when the adsorption time is 60min, the adsorption of silver ions by MUF resin reaches the maximum adsorption capacity.

Embodiment 3

[0022] MUF resin is used as an adsorbent to adsorb silver ions in a solution containing silver ions. Adsorption was carried out on a constant temperature shaker. Take 6 groups of solutions containing silver ions. The initial concentration of silver ions in the solution is 100mg / L, the volume is 100mL, and the initial pH value is 4. After adsorption at 55°C for 24 hours, the adsorption capacity of MUF resin to silver ions was measured, and the results were as follows: image 3 shown. When the adsorption temperature is 25℃, the adsorption capacity of MUF resin to silver ions is 27.41mg / g; when the adsorption temperature is 55℃, the adsorption capacity of MUF resin to silver ions is 28.19mg / g. from image 3 It can be seen that the higher the temperature, the better the adsorption effect of MUF resin on silver ions.

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Abstract

The invention discloses a method for enriching micro sliver irons by utilizing melamine modified urea resin. The method is characterized in that melamine modified urea resin is taken as an adsorbent; and a constant-temperature oscillation method is adopted to adsorb silver ions in a silver ion containing solution. According to the method disclosed by the invention, melamine modified urea resin raw material is cheap and easily available; the preparation method is simple; selectivity on sliver ions is high; melamine modified urea resin is utilized to adsorb silver irons and 110 mAg of radioactive isotope thereof in a water body, so that 110 mAg field measurement needs of efflux of a nuclear power station can be met, especially, quick field measurement needs under an emergency situation are met; and meanwhile, a sample treated on site is convenient to transport, and an application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to a method for enriching trace silver ions by using melamine-modified urea-formaldehyde resin. Background technique [0002] Nuclear energy, as a clean and efficient energy source, has gained widespread attention and rapid development in recent years. The effluent will be generated during the operation of the nuclear power plant, and the concentration of various substances in the effluent is an important indicator of the operating status of the nuclear power plant. At the same time, the effluent is radioactive and will affect the surrounding environment, so the surrounding environment of the nuclear power plant needs to be monitored. 110m Ag is one of the important detection targets in nuclear power plant effluent detection. [0003] However, nuclear power plant effluent 110m The concentration of Ag is far below the detection limit of current measurin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/00G01T1/167
Inventor 金一笛魏倩宫正韩晶晶鲁彤唐双凌
Owner NANJING UNIV OF SCI & TECH
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