A kind of remediation method of heavy metal polluted soil
A technology of polluted soil and remediation method, applied in the restoration of polluted soil, etc., can solve the problems of adverse effects on soil fertility and unsatisfactory passivation effect, and achieve the promotion of passivation and bacterial reproduction, taking into account the passivation rate and remediation Efficiency, effect of improving soil fertility
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Embodiment 1
[0042] The soil in a titanium mining area was selected for restoration. The pollution of the soil is shown in Table 1.
[0043] Preparation of biochar:
[0044] Dry the rice straw, grind it into powder, put it into a horse boiling furnace, and heat it to 700°C for 2 hours to decompose.
[0045] Repair method:
[0046] first step,
[0047] Mix 1.5g / m of biochar into the soil 3 , while adding water until the water content reaches 45%, stir well, and cultivate for 40 days.
[0048] second step,
[0049] Then add bacteria solution 20L / m 3 Soil and calcium phosphate 5g / m 3 Soil, the concentration of bacteria solution is 2×10 8 CFU Escherichia coli / mL, continue to culture for 60 days, and turn over every other day during this period.
Embodiment 2
[0051] Contaminated soil and biochar sources are the same as in Example 1, and the remediation method is:
[0052] first step,
[0053] Mix 2.0g / m of biochar into the soil 3 , while adding water until the water content reaches 50%, stir well, and cultivate for 35 days.
[0054] second step,
[0055] Then add bacteria solution 35L / m 3 Soil and calcium phosphate 6.5g / m 3 Soil, the concentration of bacteria solution is 2.5×10 8 CFU Escherichia coli / mL, continue to culture for 75 days, and turn over every other day during this period.
Embodiment 3
[0057] Soil source is with embodiment 1.
[0058] Preparation of biochar:
[0059] Dry the rice straw, grind it into powder, put it into a horse boiling furnace, and heat it to 450°C for 2 hours to decompose.
[0060] The fix is:
[0061] first step,
[0062] Mix 2.0g / m of biochar into the soil 3 , while adding water until the water content reaches 50%, stir well, and cultivate for 35 days.
[0063] second step,
[0064] Then add bacteria solution 35L / m 3 Soil and calcium phosphate 6.5g / m 3 Soil, the concentration of bacteria solution is 2.5×10 8 CFU Escherichia coli / mL, continue to culture for 75 days, and turn over every other day during this period.
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