Phosphorus adsorption material and preparation method thereof
A technology of adsorption materials and phosphorus adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of material loss, poor regeneration effect, difficult recycling, etc., and achieve strong material stability , fast adsorption speed, good regeneration effect
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Embodiment 1
[0027] Dissolve ferrous chloride and lanthanum chloride in a molar ratio of Fe:La=1:2 to form an aqueous solution, in which the concentration of iron ions is 0.5M, and stir evenly at room temperature; under stirring conditions, add 4mol / L sodium hydroxide solution until the pH of the solution is 9.5, stop adding alkali; add sodium chlorate to the mixed solution, the concentration of sodium chlorate is 0.15M, and keep stirring and aging at a temperature of 20°C for 8 hours; centrifuge and wash until The pH of the effluent is neutral; the washed product is dried to constant weight at 95°C, crushed and passed through a 200-mesh sieve; the obtained powdery product is calcined at 300°C for 24 hours to obtain a yellow-brown powder, which is the product of the present invention. Phosphorus adsorption material.
[0028] This phosphorus adsorption material is used to remove phosphate in water. Under the conditions of temperature 25°C and pH=7, when the initial total phosphorus is 13mg...
Embodiment 2
[0030] Dissolve ferrous sulfate and lanthanum nitrate at a molar ratio of Fe:La=1:1.5 to form an aqueous solution, in which the concentration of iron ions is 0.7M, and stir evenly at room temperature; under stirring conditions, add 6mol / L dropwise to the above solution Stop adding ammonia water until the pH of the solution is 7.0. Add hydrogen peroxide to the mixed solution. The concentration of hydrogen peroxide is 0.35M. Stir and age at a temperature of 55°C for 4 hours; centrifuge and wash until the pH of the effluent is neutral; The washed product was dried to constant weight at 75°C, and the powdery product obtained after crushing was calcined at 550°C for 4 hours to obtain a yellow-brown powder, which is the phosphorus adsorption material of the present invention.
[0031] This phosphorus adsorption material is used to remove phosphate in water. When the temperature is 25°C, pH=7, the initial total phosphorus is 13mg / L, and the dosage of the adsorbent is 0.1g / L, the adsor...
Embodiment 3
[0033] Dissolve ferrous sulfate and ceric sulfate in a molar ratio of Fe:Ce=1:1 to form an aqueous solution, in which the concentration of iron ions is 1M, and stir evenly at room temperature; under stirring conditions, add 3mol / L dropwise to the above solution Potassium hydroxide solution until the pH of the solution is 10.0, stop adding potassium hydroxide dropwise; add potassium permanganate to the mixed solution, the concentration of potassium permanganate is 0.2M, and continue to stir and age at a temperature of 45 °C for 6 hours; centrifuge And wash until the pH of the effluent is neutral; the washed product is dried to constant weight at 60°C, and the powdery product obtained after crushing is roasted at 600°C for 3 hours to obtain yellow-brown particles, which is the phosphorus adsorption of the present invention. Material.
[0034] This phosphorus adsorption material is used to remove phosphate in water. When the temperature is 25°C, pH=7, the initial total phosphorus...
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