Magnetic biochar adsorbent based on chia seed gum and preparation method
A technology of chia seed gum and chia seeds is applied in the field of magnetic biochar adsorbent and preparation, and achieves the effects of accelerated removal, good appearance, cheap economic benefits
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[0034] The preparation method of the magnetic biochar adsorbent based on chia seed gum provided by the embodiment of the present invention comprises the following steps:
[0035] 1) Crush chia seeds, sterilize and kill enzymes, and use infrared radiation for sterilizing and killing enzymes. The irradiation time is 9-15 minutes, and the irradiance is 2.5-3.5kW / m 2 , The irradiation distance is 80-100mm. Then according to the mass ratio of chia seed gum to water of 1: (90-100), the chia seed gum is hydrolyzed and extracted, stirred at room temperature for 4-5 hours; the chia seed gum slurry is centrifuged at 7000-8000 rpm for 15-20 minutes, Filtrate, repeat alcohol precipitation for 3 to 5 times, and dry in an electric heating blast drying oven at 50 to 60°C to obtain chia seed gum;
[0036] 2) Take walnut shells and pyrolyze them in a muffle furnace at 300-320°C for 3-4 hours, wash and dry; soak the pretreated walnut shells in a concentration of 1mol L -1 Immerse in sodium hy...
Embodiment 1
[0041] 1) Take 1g, 10g, and 20g of chia seeds that are initially crushed to sterilize and sterilize enzymes, and 1g of chia seeds to sterilize and sterilize enzymes takes 9 minutes of irradiation time and 2.5kW / m 2 Irradiance, 100mm irradiation distance to kill bacteria and enzymes; 10g chia seeds take 9min irradiation time, 3.0kW / m 2 Irradiance, 90mm irradiation distance to kill bacteria and enzymes; 20g chia seeds take 15min irradiation time, 3.5kW / m 2 Irradiance, 80mm irradiation distance to sterilize and kill enzymes, after the treatment is completed, add them to 90ml, 1000ml, and 2000ml deionized water flasks respectively, stir at room temperature for 4 hours, 4.5 hours, and 5 hours respectively, and record them as No. 1 , No. 2, and No. 3. Extract chia seed glue, take No. 1 chia seed glue slurry and centrifuge (7000rpm, 15min), take No. 2 chia seed glue slurry and centrifuge (7500rpm, 17min), take No. 3 chia seed glue slurry and centrifuge (8000rpm, 20min) Take out the...
Embodiment 2
[0051] 1) Preliminarily crush 10g of chia seeds to kill bacteria and enzymes, take 12min irradiation time, 3.0kW / m 2 Irradiance, 90mm irradiation distance to sterilize the enzyme, then add it to a 1.0L deionized water flask, add 1000ml electrolysis, stir at room temperature for 4 hours, the electrolysis water is weakly acidic, pH is 6.5, and extract chia seed gum , centrifuge the chia seed gum slurry (7500rpm, 17min), filter and take out the supernatant, repeat alcohol precipitation three times, take the precipitate and dry it (dried and stored in an electric heating blast drying oven at 60°C) to obtain 1.0% (w / v) chia seed gum, spare;
[0052] 2) Take 3 g of walnut shells and pyrolyze them in a muffle furnace (300°C (6°C min -1 Heating rate) heating for 4.5 hours), washing and neutralizing with deionized water. Subsequently, the pretreated walnut shells were mixed in 300ml (1mol L -1 ) in sodium hydroxide at room temperature for 24 hours, then taken out, ground and filtere...
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