Synthesis method and application of Na-Mg-Sn-S metal sulfide adsorbent
A na-mg-sn-s, metal sulfide technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, radioactive purification, etc. Harsh conditions and other problems, to achieve the effect of good adsorption effect, fast adsorption speed and low synthesis cost
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Embodiment 1
[0026] 60mmol Na 2 CO 3 , 18mmolMgCl 2 ·6H 2 O, 18mmol SnCl 2 , 120mmol S into the polytetrafluoroethylene liner of the autoclave; add 2mL of ultra-pure water drop by drop, and stir until the mixture is uniform without air bubbles; cover the autoclave tightly, and conduct a hydrothermal reaction in a preheated 200°C oven for 24 hours; The autoclave was naturally cooled to room temperature, and the resulting reaction product was washed three times with ultrapure water and twice with 95% ethanol, and then centrifuged; dried in vacuum at 80°C for 16 hours, and passed through a 50-mesh sieve to obtain a metal sulfide adsorbent.
[0027] The morphology of the metal sulfide adsorbent obtained in this embodiment is observed with a scanning electron microscope, as figure 1 , the adsorbent is in the form of nano-sheets, arranged closely and uniformly. The obtained metal sulfide adsorbent was used to adsorb Sr in water 2+ , to contain 5mg / LSr 2+ Add 0.5g / L of adsorbent to the sol...
Embodiment 2
[0032] 60mmol Na 2 CO 3 , 18mmolMgCl 2 ·6H 2 O, 18mmol SnCl 2 2H 2 Add O and 120mmol S to the polytetrafluoroethylene liner of the autoclave; add 2mL of ultrapure water drop by drop, and stir until the mixture is uniform without air bubbles; cover the autoclave tightly, and conduct a hydrothermal reaction in a preheated 200°C oven for 24 hours ; The high-pressure reactor was naturally cooled to room temperature, and the resulting reaction product was washed three times with ultrapure water, washed twice with 95% ethanol and then centrifuged; after vacuum drying at 80°C for 16 hours, passed through a 50-mesh sieve to obtain a metal sulfide adsorbent . To contain 5mg / LSr 2+ Add 0.5g / L metal sulfide adsorbent to the solution, shake at a constant temperature of 25°C for 120min, separate the solid and liquid, and measure the remaining Sr by ICP-OES 2+ The concentration of the calculated Sr 2+ The removal rate was 99.72%.
Embodiment 3
[0034] 60mmol Na 2 CO 3 , 24mmolMgCl 2 ·6H 2 O, 12mmol SnCl 2 , 120mmol S into the polytetrafluoroethylene liner of the autoclave; add 2mL of ultra-pure water drop by drop, and stir until the mixture is uniform without air bubbles; cover the autoclave tightly, and conduct a hydrothermal reaction in a preheated 200°C oven for 24 hours; The autoclave was naturally cooled to room temperature, and the resulting reaction product was washed three times with ultrapure water and twice with 95% ethanol, and then centrifuged; dried in vacuum at 80°C for 16 hours, and passed through a 50-mesh sieve to obtain a metal sulfide adsorbent. To contain 5mg / LSr 2+ Add 0.5g / L metal sulfide adsorbent to the solution, shake at a constant temperature of 25°C for 120min, separate the solid and liquid, and measure the remaining Sr by ICP-OES 2+ The concentration of the calculated Sr 2+ The removal rate is 99.88%.
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