Remediation agent and remediation method for remediating aged petroleum contaminated soil
A technology for contaminated soil and remediation agents, applied in the field of underground contaminated soil remediation, can solve problems such as increased difficulty in remediation, less remediation, and complexity.
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Embodiment 1
[0044] The polluted soil is the soil of an old oily wastewater polluted site in Shandong Province, and the pollutants are petroleum hydrocarbons and meta-xylene. According to the site survey results, lightly, moderately and heavily polluted soils were excavated and transported to the soil disposal workshop. The total petroleum hydrocarbons in lightly, moderately and severely polluted soils were determined by "Gas Chromatography for the Determination of Petroleum Hydrocarbons (C10-C40) in Soil and Sediments" (HJ 1021-2019) was tested, and the TPH concentrations were: 635mg / kg, 2062mg / kg, and 3891mg / kg. Meta & p-xylene was detected by "Determination of Volatile Organic Compounds in Soil and Sediment by Purge and Trap / Gas Chromatography-Mass Spectrometry" (HJ 605-2011), and the concentrations were 21.5mg / kg, 68.6mg / kg, and 138mg respectively / kg. For polluted soil, first use mechanical equipment to remove sundries and crush the soil to a diameter of 30 mm, then add 1%, 2%, and 3...
Embodiment 2
[0048] The polluted soil is the soil of a petrochemical polluted site in Gansu Province, and the pollutants are petroleum hydrocarbons and benzene series (benzene and ethylbenzene). The concentrations of TPH in lightly, moderately and heavily polluted soils are 4600mg / kg, 5830mg / kg and 7120mg / kg respectively, and the concentrations of benzene series are 20.6mg / kg, 55.1mg / kg and 75.2mg / kg respectively. In this example, in the light, medium and heavily polluted soils, the compound surfactant microemulsion additions are respectively 1%, 2%, 3%, and the rhamnolipid (concentration 0.1%) additions are respectively 0.5%, 1%, 2%, quicklime addition is respectively 5%, 10%, 15%, and sodium persulfate addition is respectively 1%, 2%, 3%, other parameters and operation are identical with example 1. The degradation of pollutants is shown in Table 2.
[0049] Table 2 Example 2 The removal rate of soil pollutants in different pollution degrees
[0050] degree of pollution ligh...
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