Experiment on Activated Sodium Persulfate Oxidation of Benzoapyrene Contaminated soil
As a typical representative of polycyclic aromatic hydrocarbons,benzo(a)pyrene has the char-acteristics of refractory,high carcinogenicity and high hydrophobicity.In order to ensure public health and environmental safety,the remediation of B(a)pyrene-contaminated soil is urgent.In this study,the shaking bed oxidation experiment was used as a laboratory simulation experiment to explore the degra-dation rate of benzopyrene by Fenton reagent and sodium persulfate reagent.Then,sodium persulfate was used as the oxidant,ferrous sulfate and citric acid were used as activators,and the removal effect of benzo(a)pyrene under sodium persulfate oxidation technology and its effect on soil physical and chemical properties were analyzed in detail through laboratory tests.In order to ensure that the above results can be applied to the actual project,the feasibility of the ratio is finally verified by the test in the field engineering.The results showed that the addition of 2%sodium persulfate and the molar mass ratio of sodium persulfate to ferrous sulfate and citric acid was 5:1:1,which was the best ratio for local block treatment.This ratio can provide theoretical support for similar engineering applications and provide data confirmation for similar polluted sites.
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