Preparation method of cerium salt modified crustacean waste adsorbent
A technology for crustaceans and waste, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve problems such as unreasonable treatment and disposal, low adsorption capacity, environmental pollution, etc., to reduce treatment costs, Improvement of adsorption effect and reduction of environmental pollution
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Embodiment 1
[0024] (1) Soak 50g of crab shells in 1000mL of 1mol / L HCl solution for 5 hours, then wash repeatedly with water until the pH value is 6.0, and dry them in an oven at 70°C to obtain pretreated raw materials.
[0025] (2) React the pretreated raw material at 500°C for 1.2 hours, then immerse it in a potassium hydroxide solution with a mass concentration of 50% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:2, and the immersion time is 15 hours. 3 Nitrogen was fed at a flow rate of 20°C / min, heated to a temperature of 700°C at a rate of 20°C / min, reacted for 2 hours, and the nitrogen was turned off.
[0026] (3) After the product is cooled, it is soaked in a 6% HCl solution at a mass ratio of 1:10 at 50°C and stirred continuously. After 3 hours, it is filtered and washed three times with 80°C distilled water, and finally Wash with distilled water to pH 6.5, and dry at 70°C.
[0027] (4) Under the condition of 50°C, soak the above product...
Embodiment 2
[0031] (1) Soak 50 g of soft-shelled turtle shells in 750 mL of 1 mol / L HCl solution for 6 hours, then repeatedly wash with water until the pH value is 7.0, and dry them in an oven at 65 ° C to obtain pretreated raw materials.
[0032] (2) React the pretreated raw material at 600°C for 1 hour, and then immerse it in a potassium hydroxide solution with a mass concentration of 60% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:2.5. The immersion time is 12 hours. 3 Nitrogen was fed at a flow rate of 10°C / min, heated to a temperature of 800°C at a rate of 10°C / min, reacted for 1.5 hours, and the nitrogen was turned off.
[0033] (3) After the product is cooled, soak it in a 6% HCl solution at a mass ratio of 1:20 at 60°C and keep stirring. After 2 hours, filter it, wash it with 70°C distilled water for 3 times, and finally Wash with distilled water to pH 6.8, and dry at 65°C.
[0034] (4) Under the condition of 60°C, soak the above produc...
Embodiment 3
[0038] (1) Soak 50g of shrimp shells in 1250mL of 1mol / L HCl solution for 4 hours, then repeatedly wash with water until the pH value is 6.5, and dry them in an oven at 75°C to obtain pretreated raw materials.
[0039] (2) React the pretreated raw material at 400°C for 1.5 hours, and then immerse it in the potassium hydroxide solution with a mass concentration of 80% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:3. The immersion time is 10 hours. 3 Nitrogen gas was fed at a flow rate of 15 °C / min, heated to a temperature of 750 °C at a rate of 15 °C / min, reacted for 1.8 hours, and the nitrogen gas was turned off.
[0040] (3) After the product is cooled, it is soaked in a 6% HCl solution at a mass ratio of 1:15 at 55°C and stirred continuously. After 4 hours, it is filtered and washed three times with 75°C distilled water, and finally Wash with distilled water to pH 7, and dry at 75°C.
[0041] (4) Under the condition of 40°C, soak th...
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