Treatment method of soil polluted by petroleum hydrocarbons

A treatment method and a technology for polluted soil, which is applied in the field of petroleum hydrocarbon-contaminated soil, can solve the problems of reduced soil fertility, high repair cost, and long repair period, and achieve the effect of maintaining the living environment, improving the rate and effect, and reducing the cost

Inactive Publication Date: 2019-03-01
BEIJING GEOENVIRON ENG & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] 1. Soil replacement method: The soil replacement method is to dig out the polluted soil for disposal, and then fill the excavated area with clean soil; this method can quickly and effectively repair the polluted soil for high-concentration organic polluted soil, but the replacement of soil It still needs to be disposed of and replaced with soil that needs to be improved to meet the planting needs, so the amount of work is large and the cost is high
[0004] 2. Chemical oxidation method: chemical oxidation method is to add oxidizing agents to organic polluted soil, and through oxidation reaction, the pollutant

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  • Treatment method of soil polluted by petroleum hydrocarbons
  • Treatment method of soil polluted by petroleum hydrocarbons
  • Treatment method of soil polluted by petroleum hydrocarbons

Examples

Experimental program
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Effect test

Example Embodiment

[0035] Example 1:

[0036] Take petroleum hydrocarbon-contaminated farmland soil from a place in Panshan County, Liaoning Province. After analysis, the average total petroleum hydrocarbon pollution concentration in the soil sample is 730 mg / kg.

[0037] First, take two copies of 10kg of contaminated soil,

[0038] No. ①: Add 0.625g of petroleum hydrocarbon degradation biological agent (dissolved according to the ratio of 20g / L water), stir and mix well, spray appropriate amount of water to keep the moisture content at 20-30%, maintenance time 30 days, every week during the period To fully turn the soil;

[0039] No. ②: Add 5wt% sawdust, stir and mix well, add 0.625g of petroleum hydrocarbon degradation biological agent (dissolved according to the ratio of 20g / L water), then add chicken manure, pig manure mixed organic fertilizer 62.5g, fully stir and mix well, Spray an appropriate amount of water to keep the moisture content at 20-30%, and the curing time is 30 days, during ...

Example Embodiment

[0049] Example 2:

[0050] The soil of a farmland around Lanzhou Petrochemical Company in Lanzhou City was taken. After analysis, the average total petroleum hydrocarbon pollution concentration in the soil sample was 1024.5 mg / kg.

[0051]First, take two 10kg portions of contaminated soil, number ①: add 0.625g of petroleum hydrocarbon-degrading biological agent (dissolved according to the proportion of 20g / L water), stir and mix well, spray an appropriate amount of water to keep the moisture content at 20-30% , the curing time is 30 days, during which the soil is fully turned every week;

[0052] No. ② Add 5% sawdust, stir and mix well, add 0.625g of petroleum hydrocarbon degradation biological agent (dissolved according to the ratio of 20g / L water), then add chicken manure and pig manure mixed organic fertilizer 62.5g, stir and mix well, spray Appropriate amount of water to keep its moisture content at 20-30%, curing time 30 days, during which the soil is fully turned every ...

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Abstract

The invention discloses a treatment method of soil polluted by petroleum hydrocarbons. The method includes: 1) adding sawdust to the soil polluted by petroleum hydrocarbons, and uniformly mixing the materials; 2) adding a water solution of a bio-agent for degrading the petroleum hydrocarbons, and uniformly mixing the materials; 3) adding organic fertilizers, uniformly mixing the materials and maintaining the mixture. In the method, the organic fertilizers and sawdust are easy to collect and low in cost; the bio-agent is mainly prepared from bacillus, saccharomycetes, micrococcus, enzyme and nutrient agents without substances polluting environment; by adding the sawdust to the soil in advance, breathability of soil is enhanced, and growth conditions of the microorganisms are improved. Afterthe remediation, the sawdust becomes a substance that improves fertility of the soil under the effect of the microorganisms, so that the method is environment-friendly and energy-saving. By adding the organic fertilizers, as a nitrogen and phosphorus source, optimum living environment is maintained for the microorganisms in the soil; so that the rate and effect that the microorganisms degrade thepetroleum hydrocarbons are greatly improved.

Description

technical field [0001] The invention belongs to the field of environmental restoration engineering, and more specifically relates to a method for treating soil contaminated by petroleum hydrocarbons. Background technique [0002] At present, the problem of farmland soil pollution is becoming more and more serious. Soil pollution poses a huge threat to land circulation and reuse and food quality and safety. Farmland pollution incidents occur frequently. Therefore, people pay more attention to the restoration and treatment of polluted soil. Farmland pollution is mainly divided into heavy metal pollution and organic pollution. Organic pollution mainly comes from petroleum hydrocarbon pollution to soil. At present, the methods and disadvantages of remediating petroleum hydrocarbon-contaminated soil mainly include: [0003] 1. Soil replacement method: The soil replacement method is to dig out the polluted soil for disposal, and then fill the excavated area with clean soil; this ...

Claims

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Application Information

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IPC IPC(8): B09C1/10A01B79/02
CPCA01B79/02B09C1/10
Inventor 吕正勇范吉强王勇翰冯国杰郭明达苗竹朱湖地李淑彩
Owner BEIJING GEOENVIRON ENG & TECH
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