Method for preparing soil remediation fertilizer based on lumbrukinase-attapulgite

[0033] 1) Weigh attapulgite raw ore, dry and crush to 120 mesh powder; add distilled water to soak for 1 hour, the solid-liquid ratio of attapulgite to distilled water is 1:2 (kg:L);

[0034] 2) Weigh sodium hexametaphosphate dispersant and add it to the attapulgite powder aqueous solution, the quality of sodium hexametaphosphate is 1% of the attapulgite mass; then stir for 60min, filter and rinse the filter cake with 100mL distilled water to obtain a wet filter cake , the water content of the filter cake is 3%;

[0035] 3) Add the wet filter cake to the lumbrokinase extract, the solid-to-liquid ratio of the wet attapulgite to the lumbrokinase extract is 1:5 (g:mL); stir the mixture for 10 min and then carry out vacuum freeze-drying, The freezing temperature is -80°C, the drying time is 8 hours, and finally crushed and granulated to obtain lumbrokinase-attapulgite soil repair fertilizer.

[0036] The lumbrokinase extracting solution of implementation can adopt prior art method t

[0042] 1) Weigh attapulgite raw ore, dry and crush to 150 mesh powder; add distilled water to soak for 2 hours, the solid-liquid ratio of attapulgite to distilled water is 1:3 (kg:L);

[0043] 2) Weigh the sodium hexametaphosphate dispersant and add it to the attapulgite powder aqueous solution, the quality of sodium hexametaphosphate is 2% of the attapulgite mass; then stir for 80min, filter and rinse the filter cake with 300mL distilled water to obtain a wet filter cake , the water content of the filter cake is 9%;

[0044] 3) Add the wet filter cake to the lumbrokinase extract, and the solid-to-liquid ratio of the wet attapulgite to the lumbrokinase extract is 1:10 (g:mL); stir the mixture for 15 minutes and carry out vacuum freeze-drying, The freezing temperature is -72°C, the drying time is 9 hours, and finally crushed and granulated to obtain lumbrokinase-attapulgite soil restoration fertilizer.

[0045] The lumbrokinase extracting solution of implementation can adopt prio

[0051] 1) Weigh attapulgite raw ore, dry and crush to 200 mesh powder; add distilled water to soak for 3 hours, the solid-liquid ratio of attapulgite to distilled water is 1:4 (kg:L);

[0052] 2) Weigh sodium hexametaphosphate dispersant and add it to the attapulgite powder aqueous solution, the quality of sodium hexametaphosphate is 4% of the attapulgite mass; then stir for 100min, filter and rinse the filter cake with 500mL distilled water to obtain a wet filter cake , the water content of filter cake is 17%;

[0053] 3) Add the wet filter cake to the lumbrokinase extract, and the solid-to-liquid ratio of the wet attapulgite to the lumbrokinase extract is 1:15 (g:mL); stir the mixture for 20 minutes and then vacuum freeze-dry it. The freezing temperature is -60°C, the drying time is 12 hours, and finally crushed and granulated to obtain lumbrokinase-attapulgite soil restoration fertilizer.

[0054] The lumbrokinase extracting solution of implementation can adopt prior art meth