A kind of preparation method of rice husk-based porous carbon mycotoxin adsorbent
A mycotoxin and adsorbent technology, which is applied in the field of detoxification of food and feed, can solve the problems that the research on mycotoxin adsorption has not been reported, and achieve the effect of stable adsorption, simple preparation process and low desorption rate
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Embodiment 1
[0029] Take aflatoxin as an example
[0030] After cleaning and drying 100g of rice husk, pre-carbonize in a muffle furnace at 220°C for 1 hour, then impregnate the pre-carbonized product with 10% sodium hydroxide solution for 24 hours, filter it, place it in a sintering furnace for 2 hours at 500°C, and cool it to After washing at room temperature to neutrality, the solid matter was dried to obtain rice husk-based porous carbon with a specific surface area of 85m 2 / g. When the concentration of aflatoxin was as high as 1 μg / mL, the removal rate of aflatoxin was 98.9%, and the desorption rate was 3.1% in 8 hours.
Embodiment 2
[0032] Taking zearalenone as an example
[0033] After cleaning and drying 100g of rice husk, pre-carbonize in a muffle furnace at 250°C for 1 hour, then impregnate the pre-carbonized product with 10% sodium hydroxide solution for 24 hours, filter it, place it in a sintering furnace for 4 hours at 600°C, and cool it to After washing at room temperature to neutrality, the solid matter was dried to obtain rice husk-based porous carbon with a specific surface area of 351m 2 / g. When the concentration of zearalenone was as high as 1 μg / mL, the removal rate of zearalenone was 99.3%, and the 8h desorption rate was 1.0%.
Embodiment 3
[0035] Take aflatoxin as an example
[0036] After cleaning and drying 100g of rice husk, pre-carbonize in a muffle furnace at 250°C for 0.5h, then impregnate the pre-carbonized product with 5% sodium hydroxide solution for 22h, filter it, place it in a sintering furnace for 3h at 600°C, and cool it. After reaching room temperature, wash to neutrality, dry the solid to obtain rice husk-based porous carbon, and its specific surface area is 138m 2 / g. When the concentration of aflatoxin was as high as 1 μg / mL, the removal rate of aflatoxin was 99.7%, and the desorption rate was 1.0% in 8 hours.
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