A kind of organochlorine pesticide polluted soil remediation method

A technology for pesticide-contaminated soil and contaminated soil, applied in the restoration of polluted soil and other directions, can solve the problems of restricted use by environmental conditions, high remediation costs, difficult pollutants, etc. The effect of less rotary tillage

Active Publication Date: 2020-08-28
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the contaminated soil remediation technology of organochlorine pesticide pollutants in the prior art. Either large-scale remediation facilities and equipment are required, or energy consumption is high, remediation costs are high, or it is impossible or difficult to completely remove pollutants. Removal, or the defect that its use is restricted by environmental conditions, thus providing a method for the remediation of organochlorine pesticide-contaminated soil

Method used

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  • A kind of organochlorine pesticide polluted soil remediation method
  • A kind of organochlorine pesticide polluted soil remediation method
  • A kind of organochlorine pesticide polluted soil remediation method

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Effect test

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'-DDT1.4mg / 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, added restoration agents, and the amount of water added was 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 was sampled and submitted for inspection, and the results were α-666 0.5mg / kg, β-66 660.4mg / 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 requirements (∑666 2mg / kg, ∑DDT 37....

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-6660.2mg / kg, ∑66612.2mg / kg, 24'-DDT0.6mg / kg, 44'-DDT0.7mg / kg, 44'-DDD12.5mg / kg, 44' -DDE1.8mg / kg, ∑DDT15.6mg / kg, sieved and stacked in the restoration workshop, the thickness of the stack is 45-55cm, add restoration agents, the amount of water added is 13%-15% of the soil weight, repair 2 Cycle, each cycle time is 6 days of anaerobic reaction + 4 days of aerobic reaction, a total of 20 days of repair, the same method of sampling and inspection, the results are α-666 1.1mg / kg, β-6660.7mg / 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'-DDD 3.4mg / kg, 4,4'-DDE 1.5mg / kg, ∑DDT 4.9mg / kg, reaching the restoration target value requirements (∑6662mg / kg, ∑ DDT 37.8mg / kg).

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-6660.3mg / kg, ∑66611.2mg / kg, 2,4'-DDT<0.1mg / kg, 4,4'-DDT3.2mg / kg, 4,4'-DDD38 .3mg / kg, 4,4'-DDE8.4mg / 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'-DDD 2.8mg / kg, 4,4'-DDE 2.2mg / kg, ∑DDT 5.1mg / kg, reaching the restoration target value (∑ BHC 2mg / kg, ∑DDT 37.8mg / kg).

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Abstract

Belonging to the technical field of polluted soil remediation and treatment, the invention provides a remediation method for organochlorine pesticide polluted soil. The remediation method for organochlorine pesticide polluted soil provided by the invention uses a remediation reagent with chemical reduction performance and carbon source biomass sustained release effect, and employs a mode combining periodic anaerobic fermentation chemical reduction dechlorination and aerobic biodegradation to remediate organochlorine pesticide polluted soil. The method provided by the invention has the advantages of no need for large repair facilities and equipment, low energy consumption, low cost, and environment-friendly reagent, improves the physical and chemical properties of soil, and is easy for degradation and removal of organochlorine pesticide.

Description

technical field [0001] The invention relates to the technical field of remediation and treatment of polluted soil, in particular to a method for remediating soil polluted by organochlorine pesticides. Background technique [0002] Organochlorine pesticides such as DDT (DDT) and HCH are the earliest and most widely used pesticides. They were mass-produced and used in my country in the 1950s. Due to their high toxicity, strong fat solubility, low water solubility, and refractory degradation , High residual rate, easy accumulation, great harm and other problems, the production was stopped and the use was banned in 1983. Due to the low economic and technological level in the past, weak awareness of environmental protection in chemical production, relatively simple facilities, "running, leaking, dripping, and leaking" pollution, and a large amount of organochlorine pesticide abuse in agriculture or life, a large amount of organochlorine pesticide-contaminated soil needs to be repa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/10
Inventor 谭勇壁李书鹏李泰平张辉杨乐巍刘鹏崔双超
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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