Preparation method of dictyophora-loaded vulcanized nano zero-valent iron and application
A nano-zero-valent iron and bamboo fungus technology, which is applied in chemical instruments and methods, radioactive purification, and other chemical processes, can solve obstacles to practical applications, reduce the removal effect of radionuclides, and reduce the active sites of nano-zero-valent iron and other problems, to achieve the effect of improving removal efficiency and adsorption capacity, easy to popularize, and fast adsorption rate
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Embodiment 1
[0030] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:
[0031] (1) After washing 0.5g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL of ultrapure water for 2h, then transfer the solution to a 100mL autoclave and heat at 140°C for 12h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.
[0032] (2) Take 2.48g of FeSO 4 ·7H 2 O was dissolved in 125mL of ultrapure water, and then 0.5g of Dictyophora was mixed thoroughly under mechanical stirring for 5min, and then 0.11g of Na 2 S 2 o 4 Continue to stir for 5min, then use the syringe pump to inject NaBH 4 (200mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min. After 1h, the so...
Embodiment 2
[0037] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:
[0038] (1) After washing 1g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL ultrapure water for 3h, then transfer the solution to a 100mL autoclave and heat at 140°C for 14h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.
[0039] (2) Take 4.96g of FeSO 4 ·7H 2 O was dissolved in 250mL of ultrapure water, and 1g of bamboo fungus was added. After mixing thoroughly for 10min under mechanical stirring, 0.22g of Na 2 S 2 o 4 Continue to stir for 10min, then use the syringe pump to inject NaBH 4 (400mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min, and after 3 hours, ...
Embodiment 3
[0041] The preparation of bamboo fungus loaded with sulfide nanometer zero-valent iron comprises the following steps:
[0042] (1) After washing 2g of Dictyophora with ultrapure water and absolute ethanol, soak it in 60mL of ultrapure water for 5h, then transfer the solution to a 100mL autoclave and heat at 140°C for 16h. After cooling to room temperature, centrifuge at 4000 rpm for 10 min, wash with ultrapure water and absolute ethanol until the solution becomes neutral, remove the supernatant, and dry in a freeze-drying oven at -40°C for 24 h. Finally, the dried solid is ground into powder form for later use.
[0043] (2) Take 7.44g of FeSO 4 ·7H 2 O was dissolved in 500mL of ultrapure water, and 1.5g of bamboo fungus was added. After fully mixing for 15min under mechanical stirring, 0.33g of Na 2 S 2 o 4 Continue to stir for 15min, then use the syringe pump to inject NaBH 4 (600mL, 0.108mol / L) was added to the above suspension at a rate of 4mL / min, and after 5h, the s...
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