Remediation method for organochlorine pesticide polluted soil
A technology for pesticide-contaminated soil and contaminated soil, which is applied in the restoration of contaminated soil and other directions, can solve the problems of restricted use by environmental conditions, high remediation costs, difficult pollutants, etc., and achieves low comprehensive remediation costs, low pharmaceutical costs, The effect of less rotary tillage
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Embodiment 1
[0056] Embodiment 1. Remediation of organochlorine pesticide contaminated soil
[0057] Slightly polluted soil by organochlorine pesticides, 9 points, quartered method to take mixed samples for inspection, α-666 5.2mg / kg, β-666 3.9mg / kg, δ-6660.2mg / kg, γ-HCH 0.2mg / kg, ∑ BCH 9.6mg / kg, 2 4'-DDT 1.4mg / kg, 4 4'-DDT 0.7mg / kg, 4 4'-DDD 5.7mg / kg , 4 4'-DDE 2.3mg / kg, ∑DDT 10.1mg / kg, sieved and stacked in the restoration workshop with a thickness of 56-60cm, adding restoration agents, the amount of water added is 13-15% of the soil weight, Repair 3 cycles, each cycle time is 4 days of anaerobic reaction + 3 days of aerobic reaction, a total of 21 days of repair, the same method of sampling and inspection, the results are α-666 0.5mg / kg, β-666 0.4mg / kg, δ-666<0.1mg / kg, γ-666<0.1mg / kg, ∑6661mg / kg, 2,4'-DDT<0.1mg / kg, 4,4 '-DDT<0.1mg / kg, 4,4'-DDD1.7mg / kg, 4,4'-DDE 0.8mg / kg, ∑DDT 2.5mg / kg, reaching the restoration target value requirement (∑6662mg / kg, ∑DDT 37.8mg / kg).
Embodiment 2
[0058] Embodiment 2. Remediation of organochlorine pesticide contaminated soil
[0059] Slightly polluted soil by organochlorine pesticides, 9 points, quartered method to take mixed samples for inspection, α-HCH 4.1mg / kg, β-HCH 7.5mg / kg, δ-HCH 0.4mg / kg kg, γ-HCH 0.2mg / kg, ∑ BCH 12.2mg / kg, 2 4'-DDT 0.6mg / kg, 4 4'-DDT 0.7mg / kg, 4 4'-DDD 12.5mg / kg , 4 4'-DDE 1.8mg / kg, ∑DDT 15.6mg / kg, sieved and stacked in the restoration workshop with a thickness of 45-55cm, added restoration agents, and the amount of water added was 13%-15% of the soil weight , repaired for 2 cycles, each cycle time is 6 days of anaerobic reaction + 4 days of aerobic reaction, a total of 20 days of repair, the same method was sampled and submitted for inspection, and the results were α-666 1.1mg / kg, β-66 60.7mg / kg, δ-6660.1mg / kg, γ-666<0.1mg / kg, ∑6661.9mg / kg, 2,4'-DDT<0.1mg / kg, 4, 4'-DDT<0.1mg / kg, 4,4'-DDD3.4mg / kg, 4,4'-DDE 1.5mg / kg, ∑DDT 4.9mg / kg, reaching the restoration target value requirement (∑6662mg / k...
Embodiment 3
[0060] Embodiment 3. Remediation of organochlorine pesticide contaminated soil
[0061] Moderately polluted soil by organochlorine pesticides, 9 points, quartered method to take mixed samples for inspection, α-666 3.9mg / kg, β-6666.6mg / kg, δ-6660.4mg / kg, γ-HCH 0.3mg / kg, ∑ BCH 11.2mg / kg, 2,4'-DDT<0.1mg / kg, 4,4'-DDT 3.2mg / kg, 4,4'-DDD38 .3mg / kg, 4,4'-DDE 8.4mg / kg, ∑DDT 49.9mg / kg, sieved and stacked in the restoration workshop with a thickness of 58-65cm, adding restoration agents, the amount of water added is the weight of the soil 14-16% of 14-16%, repair 3 cycles, each cycle time is 4 days of anaerobic reaction + 5 days of aerobic reaction, a total of 27 days of repair, the same method of sampling and inspection, the result is α-6660.6mg / kg , β-6660.4mg / kg, δ-666<0.1mg / kg, γ-666<0.1mg / kg, ∑6661mg / kg, 2,4'-DDT<0.1mg / kg, 4,4'-DDT 0.1mg / kg, 4,4'-DDD2.8mg / kg, 4,4'-DDE 2.2mg / kg, ∑DDT 5.1mg / kg, reaching the restoration target value (∑ BHC 2mg / kg, ΣDDT 37.8mg / kg).
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