Method for adopting asparagine modified albuminoid amidogen chelating resins to conduct treatment and remove uranyl ions
A technology of asparagine and chelating resin, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of difficult capacity reduction, difficult synthesis, low adsorption capacity, etc., and achieve the treatment effect Excellent, short time, convenient removal effect
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Embodiment 1
[0016] The asparagine-modified protein-like amino chelating resin with F / U molar ratio of 0.8 was synthesized by the three-step method of alkali-acid-alkali. Formaldehyde solution (mass concentration 37%) is added in the reactor, start stirring device, adjust system pH with 20% (mass concentration) NaOH solution to be 7.5, add the first batch of urea (at this time F / U is 2.2), heat up. When the temperature reaches 35°C and 60°C, keep warm for 10 minutes respectively; heat up to 95°C and keep warm for 60 minutes. Adjust the pH to 4.0 with 20% (mass concentration) acetic acid solution, and continue the reaction for 60 min at 95°C; adjust the pH to 6.0 with 20% (mass concentration) NaOH solution, add the second batch of urea (at this time F / U 1.6), lower the temperature to 85° C., and keep it warm for 20 minutes; add NaOH solution, adjust the pH value of the system to alkaline 7.5, and add 1% asparagine and remaining urea (at this time F / U is 0.8), lower the temperature to 75°...
Embodiment 2
[0018] Asparagine-modified protein-like amino chelating resin with F / U molar ratio of 1.6 was synthesized by alkali-acid-alkali three-step method. Add formaldehyde solution (mass concentration 37%) into the reactor, start the stirring device, adjust the pH of the system to 8.0 with 20% (mass concentration) NaOH solution, add the first batch of urea (at this time F / U is 2.2), heat up. When the temperature reaches 30°C and 65°C, keep warm for 15 minutes respectively; when the temperature rises to 90°C, keep warm for 75 minutes. Adjust the pH to 4.5 with 20% (mass concentration) acetic acid solution, and continue the reaction for 75 min at 90°C; adjust the pH to 6.5 with 20% (mass concentration) NaOH solution, add the second batch of urea (at this time F / U 1.6), lower the temperature to 80°C, and keep warm for 30min; add NaOH solution, adjust the pH value of the system to alkaline 8.0, add asparagine whose mass is 1% of the total mass of urea, lower the temperature to 70°C, keep...
Embodiment 3
[0020] Asparagine-modified protein-like amino chelating resin is used as an adsorbent to adsorb uranyl ions in a solution containing uranyl ions. Adsorption was carried out on a constant temperature shaker. Take 8 groups of uranyl ion-containing solutions with different pH values (pH value 1-8), the UO in the solution 2 2+ The initial concentration is 100mg / L, and the volume is 100mL. Add 0.4g of asparagine-modified protein-like amino chelating resin respectively, and the adsorption temperature is 25°C. After adsorption for 3.5h, measure the Amino Chelating Resin to UO 2 2+ The adsorption capacity, the results are as follows figure 1 shown. When the initial pH value was 1, the asparagine-modified protein-like amino chelating resin was measured for UO 2 2+ The adsorption capacity is 13.77mg / g; When the initial pH value was 5, the asparagine modified protein-like amino chelating resin was measured for UO 2 2+ The adsorption capacity is 46.71mg / g; When the initial pH v...
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