In-situ characterization method for advanced oxidation process of polycyclic aromatic hydrocarbon pollutants based on isotope imaging technology

By using carbon-14 radioisotope tracing technology and a radionuclide quantitative imaging system, the problem of the difficulty in comprehensively characterizing the advanced oxidative degradation process of polycyclic aromatic hydrocarbons in existing technologies has been solved. This enables rapid, in-situ, and visualized characterization of polycyclic aromatic hydrocarbon pollutants, improving the accuracy and efficiency of assessment.

CN122193490APending Publication Date: 2026-06-12ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2026-04-16
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing non-radioactive research methods are time-consuming and complex to assess the advanced oxidative degradation process of polycyclic aromatic hydrocarbons, and cannot fully characterize unknown degradation products and non-extractable products, leading to biases in the assessment of site contamination remediation effectiveness.

Method used

By employing carbon-14 radioisotope tracing technology combined with a radionuclide quantitative imaging system, the specific migration value and diffusion degree of polycyclic aromatic hydrocarbons and their advanced oxidation products on soil thin-layer chromatography plates are monitored through in-situ thin-layer chromatography, thereby achieving real-time monitoring and visual characterization of the advanced oxidation reaction process.

Benefits of technology

It enables an objective and comprehensive assessment of the parent polycyclic aromatic hydrocarbon pollutants and all their degradation products, shortens imaging time, and can intuitively reflect the oxidative degradation process, thus improving the accuracy and efficiency of the assessment.

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Abstract

The application discloses a kind of based on isotopic imaging technology's polycyclic aromatic hydrocarbon class pollutant advanced oxidation process in-situ characterization method, comprising: soil powder is added to deionized water and stirred into slurry, evenly spread on glass plate, avoid light and dry, obtain chromatographic plate;Isotope carbon-14 labeled PAH solution is spotted on chromatographic plate, after volatilization and drying, Fenton reagent is added dropwise at spotting place to carry out soil in-situ Fenton reaction, complete oxidation model construction;Soil chromatographic plate is placed in chromatographic cylinder containing developing agent by tilting and chromatography is carried out, then in-situ imaging is carried out using radioisotope imager, and characterization result is obtained;The application combines radioisotope imaging and soil thin layer chromatography experiment, and the moving ability of PAH in different developing agent is directly and intuitively displayed in visual form, the change of compound component after Fenton reaction is preliminarily revealed, and it is suitable for in-situ rapid characterization of PAH site pollution remediation research.
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