Method for restoring organophosphorus pesticide contaminated soil
A technology for organophosphorus pesticides and polluted soil, applied in the field of remediation of organophosphorus pesticide-contaminated soil, can solve problems such as unsatisfactory remediation of organophosphorus pesticide-contaminated soil, and achieve the effects of accelerated reaction participation, strong engineering practicability, and accelerated heterogeneous migration.
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Embodiment 1
[0038] 1. Take 500g of soil polluted by organophosphorus pesticides in a pesticide factory in Tianjin after screening (concentration is 3342mg / Kg), add 5g of solid sodium hydroxide, and stir evenly;
[0039] 2. Measure 200mL of polyethylene glycol aqueous solution with a mass fraction of 1%, add it to the soil in the above step and stir evenly, the pH is 9-10;
[0040] 3. Seal the soil after dosing according to the above steps for 3 days, and keep the soil moisture during storage and maintenance;
[0041] 4. Add 10g of activated persulfate to the soil after conditioning and decomposing and stir well;
[0042] 5. Add 10mL sulfuric acid aqueous solution with a volume fraction of 1:1, the pH is 5-6, while stirring rapidly;
[0043] 6. Seal and stockpile the soil after repairing according to the above steps, keep the soil moisture for 1 day and send it for inspection.
[0044]Send inspection, detection method is as follows (other embodiments are connected with this detection met...
Embodiment 2
[0048] 1. Take 500g of soil polluted by organophosphorus pesticides in a pesticide factory in Tianjin after screening (concentration is 6782mg / Kg), add 8g of solid sodium hydroxide, and stir evenly;
[0049] 2. Measure 180mL of polyethylene glycol aqueous solution with a mass fraction of 2%, add it to the soil in the above step and stir evenly, the pH is 10-11;
[0050] 3. Seal the soil after dosing according to the above steps for 2 days, and keep the soil moisture during storage and maintenance;
[0051] 4. Add 15g of solid potassium ferrate to the above-mentioned conditioned and heaped soil and stir well;
[0052] 5. Add 38mL sulfuric acid aqueous solution with a volume fraction of 1:1, the pH is 3-4, while stirring rapidly;
[0053] 6. Seal and stockpile the soil after repairing according to the above steps, keep the soil moisture for 2 days and send it for inspection.
[0054] The results showed that the concentration of organophosphorus pesticides in the repaired soil ...
Embodiment 3
[0056] 1. Take 500g of soil polluted by organophosphorus pesticides in a pesticide factory in Tianjin after screening (concentration is 3478mg / Kg), add 8g of solid potassium hydroxide, and stir evenly;
[0057] 2. Measure 50mL of polyethylene glycol aqueous solution with a mass fraction of 5%, add it to the soil in the above step and stir evenly, the pH is 10-11;
[0058] 3. Seal the soil after dosing according to the above steps for 3 days, and keep the soil moisture during storage and maintenance;
[0059] 4. Add 10g of solid potassium permanganate to the above-mentioned soil after conditioning and decomposing, and stir well;
[0060] 5. Add 34mL sulfuric acid aqueous solution with a volume fraction of 1:1, the pH is 3-4, while stirring rapidly;
[0061] 6. Seal and stockpile the soil after repairing according to the above steps, keep the soil moisture for 2 days and send it for inspection.
[0062] The results show that the concentration of organophosphorus pesticides in ...
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