Elution and oxidative degradation integrated organic contaminated soil remediation device and method
A technology of oxidative degradation and organic pollution, applied in the field of contaminated soil remediation, to achieve the effect of convenient operation, improved desorption effect, and no secondary pollution
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Embodiment 1
[0032] use figure 1 Repair device shown. The eluent is composed of nonionic surfactant Tween80 and anionic surfactant sodium lauryl sulfate in a ratio of 1:1. Artificially prepare the organochlorine pesticide DDT to pollute the soil, and the concentration of DDT is 3.6mg / kg. Put the contaminated soil into the tank through the soil feed port, add an eluent with a concentration of 4.0g / L, turn on the ultrasonic device and mixer, set the ultrasonic power to 200W, the ultrasonic frequency to 100khz, and the stirring speed to 60 rpm, and continue to process for 2 hours Finally, add sodium persulfate solution, the molar ratio of added persulfate to DDT is 20:1, keep the water-to-soil ratio at 5:1, and continue the treatment for 2 hours. After the treatment, it was determined that the removal rate of DDT in the soil reached 78.1%, and the removal effect was good.
Embodiment 2
[0034] Artificially prepare polycyclic aromatic hydrocarbon naphthalene to simulate polluted soil, the concentration of naphthalene is 5.82mg / kg. Using the same device and treatment method as in Example 1 to treat the soil, it was determined that the removal rate of naphthalene in the soil after one treatment reached 84.6%, and the removal effect was good.
Embodiment 3
[0036] Five kinds of polycyclic aromatic hydrocarbons compound polluted soil of phenanthrene, naphthalene, pyrene, anthracene and acenaphthene are configured, and the total concentration in the soil is 7.73mg / kg. Using the same device and treatment method as in Example 1, it was determined that the total removal rate of polycyclic aromatic hydrocarbons in the soil after one treatment reached 70.3%, and the removal effect was good.
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