Modified biochar and method for repairing heavy metal pollution of soil by using modified biochar
A technology for repairing soil and biochar, which is applied in botany equipment and methods, restoration of polluted soil, non-metallic elements, etc. It can solve the problem of limited adsorption capacity of heavy metals, small specific area and pore volume, and poor soil restoration effect, etc. problems, to achieve the effect of enriching oxygen-containing functional groups, large specific area, and strong pollutant adsorption capacity
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Embodiment 1
[0038] A modified biophaco, prepared from the following method:
[0039] S1, dry the corn straw;
[0040] S2, crushing corn straw to get straw powder, straw powder over 0.8cm screen;
[0041] S3, stir the stirring of straw powder, so that the water content of straw powder is 20%;
[0042] S4, send straw powder into the charcoal furnace, close the carbonization furnace;
[0043] S5, the carbon dioxide gas is introduced, and the air in the carbonifination furnace is purified;
[0044] S6, the temperature rise rate is 5 ° C / min, rises to 100 ° C, and heat it for 15 min;
[0045] S7, the temperature rises to the carbonization temperature, the temperature rise rate is 10 ° C / min, the carbonization temperature is 680 ° C, carbonization time 2 h, to obtain modified bio;
[0046] S8, after the carbonization is completed, then the carbon dioxide gas is transferred at the time of cooling, and when the temperature drops below 600 ° C, the gas supply is stopped;
[0047] S9, the modified ...
Embodiment 2
[0049] A modified biophaco, prepared from the following method:
[0050] S1, dry the corn straw;
[0051] S2, crushing corn straw to get straw powder, straw powder over 1 cm screen;
[0052] S3, stir the stirring of straw powder, so that the water content of straw powder is 25%;
[0053] S4, send straw powder into the charcoal furnace, close the carbonization furnace;
[0054] S5, the carbon dioxide gas is introduced, and the air in the carbonifination furnace is purified;
[0055] S6, the temperature rise rate is 8 ° C / min, raised to 100 ° C, and heat insulation 25min;
[0056] S7, the temperature rises to the carbonization temperature, the temperature rise rate is 20 ° C / min, the carbonization temperature is 700 ° C, and the carbonization time is 1.5 h, and the modified bio;
[0057] S8, after the carbonization is completed, then the carbon dioxide gas is transferred at the time of cooling, and when the temperature drops below 600 ° C, the gas supply is stopped;
[0058] S9,...
Embodiment 3
[0060] A modified biophaco, prepared from the following method:
[0061] S1, dry the corn straw;
[0062] S2, crushing corn straw to get straw powder, straw powder over 1 cm screen;
[0063] S3, stir the stirring of straw powder, so that the water content of straw powder is 30%;
[0064] S4, send straw powder into the charcoal furnace, close the carbonization furnace;
[0065] S5, the carbon dioxide gas is introduced, and the air in the carbonifination furnace is purified;
[0066] S6, the temperature rise rate is 10 ° C / min, raised to 100 ° C, and heat the temperature for 30 min;
[0067] S7, the temperature rises to the carbonization temperature, the temperature rise rate is 20 ° C / min, the carbonization temperature is 750 ° C, and the carbonization time is 1 h, and the modified bio;
[0068] S8, after the carbonization is completed, then the carbon dioxide gas is transferred at the time of cooling, and when the temperature drops below 600 ° C, the gas supply is stopped;
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