Preparation method and application of a resin-based loaded iron oxide composite phosphorus removal adsorbent
A technology of iron oxide and phosphorus adsorbent, which is applied in the field of environmental management, can solve the problems of increasing the cost of composite phosphorus adsorbent and complex process, and achieve the effect of low production cost, simple preparation process and large adsorption capacity
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Embodiment 1
[0031] Take 7.14g of potassium ferrate and dissolve it in 400ml of aqueous solution with pH=10 to form a potassium ferrate solution with a concentration of 0.09mol / L. Immediately add 20g of IRA-402 resin to the potassium ferrate solution and stir magnetically for 2 hours. Exchange the ferrate with the anion on the resin, then pour off the supernatant and add 200mL of clean water, stir at 50°C for 1 hour to completely hydrolyze the ferrate on the resin into ferric hydroxide, then use 5% by mass fraction of Sodium chloride solution transforms the hydroxyl group bound on the anion resin into Cl - , and finally the composite resin loaded with nano-scale hydrated iron oxide was washed to neutrality, and air-dried or oven-dried in a cool place to obtain a composite phosphorus removal adsorbent with a solid loading capacity of Fe(III) of 25.7 mg / g.
Embodiment 2
[0033] Take 13.85g of potassium ferrate and dissolve it in 1000ml of aqueous solution with pH=12 to form a potassium ferrate solution with a concentration of 0.07mol / L. Immediately add 100g of IRA-900 resin to the potassium ferrate solution and stir it mechanically for 2 hours. Exchange the ferrate with the anion on the resin, then pour off the supernatant and add 500mL of water, stir at 70°C for 1 hour to completely hydrolyze the ferrate on the resin into ferric hydroxide, then use 2% Sodium chloride solution transforms the hydroxyl group bound on the anion resin into Cl - , and finally the composite resin loaded with nano-scale hydrated iron oxide was washed to neutrality, and air-dried or oven-dried in a cool place to obtain a composite phosphorus removal adsorbent with a solid loading capacity of Fe(III) of 24.5 mg / g.
Embodiment 3
[0035] Take 5.94g of potassium ferrate and dissolve it in 200ml of an aqueous solution with pH=9 to prepare a potassium ferrate solution with a concentration of 0.15mol / L. Immediately add 40g of D-201 resin to the potassium ferrate solution and stir magnetically for 3 hours. Exchange the ferrate with the anion on the resin, pour off the supernatant and add 100mL of water, stir at 60°C for 2 hours to completely hydrolyze the ferrate on the resin into ferric hydroxide, then use 8% Sodium chloride solution transforms the hydroxyl group bound on the anion resin into Cl - , and finally the composite resin loaded with nano-scale hydrated iron oxide was washed to neutrality, and air-dried or oven-dried in a cool place to obtain a composite phosphorus removal adsorbent with a solid loading capacity of Fe(Ⅲ) of 39.2mg / g.
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