Treatment method of soil polluted by petroleum hydrocarbons

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 ...

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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 pollutants are decomposed into carbohydrates to achieve the purpose of removing pollutants; this method has a fast repair speed for medium and low pollution concentration soils And the effect is good, but because the use of chemical agents will cause other effects on the farmland soil, and the soil fertility will be reduced after restoration, and soil improvement and other measures will be needed to restore soil fertility in the later stage, so the repair cost is high and the risk is relatively high

This method requires a certain period of time for the growth and reproduction of microorganisms, so the repair cycle is longer

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