A kind of preparation method of zinc-enriched biochar
A biochar and zinc-rich technology, applied in the field of biomass resource utilization, can solve problems such as low efficiency, huge amount of chemical fertilizer usage, and insufficient fertilizer utilization, so as to improve utilization efficiency, reduce environmental emissions and pollution, and achieve excellent mitigation Effect of controlled release properties
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Embodiment 1
[0028] 1. See the process flow chart figure 1 . Remove impurities from the yak dung, break it, and air dry. After air-drying, it is placed in an oven for drying at 105°C for 12 hours, then crushed with a pulverizer and passed through a 50-mesh sieve to obtain a powder.
[0029] 2. Combine yak powder with ZnCl catalyst 2 Mix with a mass ratio of 10:0.5, put it in the reactor, turn on the power supply and start heating from room temperature, set the stirring speed in the reaction stick to 100r min -1 The reaction conditions were kept at 300°C for 2h. After the reaction, the heating power was turned off. After the device was cooled to room temperature, the reaction device was turned on, and the solid (hydrothermal charcoal) was taken out, dried at 105°C for 12h, and passed through a 100-mesh sieve. The zinc-rich biochar controlled-release material was obtained, the Zn content was 40 mg / kg, the yield was 48%, and the 28-day cumulative nutrient release rate of the fertilizer effect e...
Embodiment 2
[0031] 1. See the process flow chart figure 1 . Remove impurities from the yak dung, crush it, and air dry. After air-drying, it is placed in an oven for drying at 105°C for 12 hours, then pulverized with a pulverizer, and passed through a 50-mesh sieve to obtain a powder.
[0032] 2. Combine yak powder with ZnCl catalyst 2 Mix with a mass ratio of 10:0.7, put it in the reactor, turn on the power and start heating from room temperature, set the stirring speed in the reaction stick to 100r min -1 The reaction conditions were kept at 250°C for 1 hour. After the reaction, the heating power was turned off. After the device was cooled to room temperature, the reaction device was opened, and the solid (hydrothermal charcoal) was taken out, dried at 105°C for 12 hours, and passed through a 100 mesh sieve. The zinc-rich biochar controlled-release material was obtained, the Zn content was 38.5 mg / kg, the yield was 57%, and the 28-day cumulative nutrient release rate of the fertilizer eff...
Embodiment 3
[0034] 1. See the process flow chart figure 1 . Remove impurities from the yak dung, break it, and air dry. After air-drying, it is placed in an oven for drying at 105°C for 12 hours, then pulverized with a pulverizer, and passed through a 50-mesh sieve to obtain a powder.
[0035] 2. Combine yak powder with ZnCl catalyst 2 Mix with a mass ratio of 10:1, place it in the reactor, turn on the power and start heating from room temperature, set the stirring speed in the reaction stick to 100r min -1 The reaction conditions were kept at 200°C for 2h. After the reaction, the heating power was cut off. After the device was cooled to room temperature, the reaction device was opened, and the solid (hydrothermal charcoal) was taken out, dried at 105°C for 12h, and passed through a 100 mesh sieve. The zinc-rich biochar controlled-release material was obtained, the Zn content was 50 mg / kg, the yield was 59%, and the 28-day cumulative nutrient release rate of the fertilizer effect experiment...
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