Magnesium-loaded biological composite material as well as preparation method and application method thereof
A composite material and biological technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc., can solve the problem that slow-release fertilizers cannot be used, achieve good adsorption effect, low production cost, and avoid mass transfer. blocking effect
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Embodiment 1
[0017] Weigh magnesium nitrate to prepare an aqueous solution with a mass fraction of 5%. Add artemia eggshells that have been ultrasonically cleaned and dried for 4 hours in advance to 100mL of the above aqueous solution. Ultrasonic at 15°C, ultrasonic frequency 60Hz, and ultrasonic power 50W Disperse for 4 hours, stir magnetically at room temperature for 10 hours, so that all Artemia egg shells sink to the bottom of the beaker, evaporate the solution to dryness in a water bath at 40°C, add it to 400 mL of 0.4% NaOH solution, and stir magnetically. Filter, wash with deionized water until neutral, and dry to obtain the magnesium-loaded biocomposite material.
[0018] 500mL of KH with a concentration of 5mg / L 2 PO 4 Put it into a Erlenmeyer flask, add 1 g of the above-mentioned magnesium-loaded biocomposite material, adjust the pH value of the solution to 7 with NaOH and HCl, shake at a constant temperature at room temperature (25° C.), and rotate at 120 rpm. After 24 hours, ...
Embodiment 2
[0021] Weigh magnesium nitrate to prepare an aqueous solution, the mass percentage of which is 20%. Add artemia eggshells that have been ultrasonicated for 4 hours and washed and dried in advance to 100mL of the above aqueous solution. Ultrasonic at 20°C, ultrasonic frequency 60Hz, and ultrasonic power Disperse for 6 hours, stir magnetically at room temperature for 16 hours, and make Artemia egg shells sink to the bottom of the beaker. The solution is evaporated to dryness in a water bath at 60°C, added to 400 mL of 1% NaOH solution, and stirred magnetically. Filter, wash with deionized water until neutral, and dry to obtain the magnesium-loaded biocomposite material.
[0022] 500mL of KH with a concentration of 10mg / L 2 PO 4 Put it into a Erlenmeyer flask, add 2g of the above-mentioned magnesium-loaded biocomposite material, adjust the pH value of the solution to 7 with NaOH and HCl, shake at a constant temperature at room temperature (25° C.), and rotate at a speed of 160 r...
Embodiment 3
[0025] Weigh magnesium nitrate to prepare an aqueous solution with a mass fraction of 40%. Add artemia eggshells that have been ultrasonicated for 4 hours and washed and dried in advance to 100mL of the above aqueous solution. Ultrasonic at 15°C, ultrasonic frequency 60Hz, and ultrasonic power 50W Disperse for 4 hours, and stir magnetically at room temperature for 12 hours to make Artemia eggshells sink to the bottom of the beaker. The solution is evaporated to dryness in a water bath at 40°C, and added to 400 mL of 4% NaOH solution, and stirred magnetically. Filter, wash with deionized water until neutral, and dry to obtain the magnesium-loaded biocomposite material.
[0026] 500mL of KH with a concentration of 30mg / L 2 PO 4 Put it into a Erlenmeyer flask, add 3g of the above-mentioned magnesium-loaded biocomposite material, adjust the pH value of the solution to 7 with NaOH and HCl, shake at a constant temperature at room temperature (25° C.), and rotate at a speed of 180 r...
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