Peat absorbent and method thereof for processing soil polluted by spilled oil

Abstract

The invention discloses a peat absorbent and a method thereof for processing soil polluted by spilled oil. The peat absorbent is prepared by mixing meadow peat, sphagnum peat and a nitrogenous fertilizer which are proportioned in a way that: in the total weight of 100, the weight percentage of the meadow peat is 25 to 33, the weight percentage of the sphagnum peat is 20 to 33 and the weight percentage of the nitrogenous fertilizer is 25 to 50. The method for processing the soil polluted by the spilled oil is implemented orderly through the following steps: spraying the absorbent into the polluted soil in a shortest time after the soil is polluted by the spilled oil, wherein the input amount of the absorbent is 0.1 to 0.17 times as great as oil spillage; adding quicklime into the soil polluted by the spilled oil, wherein the input amount of the quicklime is 0.1 to 0.3 times as great as the oil spillage; ploughing up the polluted soil sprayed with the absorbent and added with the quicklime, wherein the depth of ploughing is determined according to the penetration depth of the oil; irrigating the polluted soil in a way that the moisture of the soil reaches 80 to 85 percent; and monitoring the content of petroleum hydrocarbon in the polluted soil until the soil meets environmental standards for reuse.

Description

technical field [0001] The invention relates to a peat adsorbent for treating oil-spill polluted soil and a method for treating oil-spill polluted soil, and relates to the technical field of separation and peat processing. Background technique [0002] Petroleum has been the blood of industry for hundreds of years, and the amount of oil extracted continues to grow with market demand. During the process of oil extraction, transportation, storage and utilization, oil spills occur frequently. While oil and its products benefit mankind, they also gradually bring long-term and serious pollution to the environment in which human beings live. [0003] Like the atmosphere and water, soil is also one of the main resources that human beings depend on for survival, and it is the main component of the biosphere. Nowadays, people's demand for green food is increasing, so they pay more attention to the soil that produces green food and the type and degree of pollution. In addition to he...

AI Technical Summary

Problems solved by technology

[0007] 1. This method is only suitable for soil with poor soil permeability. For soil with good permeability, it is easy to cause the migration of pollutants and expand the scope of pollution, and even pollute groundwater;

[0008] 2. In this treatment method, the volatile substances in the oil will cause air pollution, and the slow accumulation of refractory substances will increase the toxicity of the soil (Lu Xiujun et al., Journal of Shenyang Agricultural University, 2003-02, Research on the Restoration Technology of Oil Polluted Soil status and prospects);

[0009] 3. This method needs to maintain soil moisture to improve the bioremediation effect, so it needs to irrigate the contaminated soil regularly, which limits the application of this method in areas with high irrigation costs;

[0010] 4. This method takes a long time to process, thus increasing the monitoring and management costs of the repair process, and there is a greater environmental risk;

[0011] 5. This method is not suitable for oil with high content of heavy components due to poor treatment effect

The results proved that peat-protected root treatment is beneficial to the development of alfalfa root morphology and significantly increased the degradation rate of diesel oil in the root zone soil, but did not form a technology