激光诱导荧光光谱检测土壤中多环芳烃的进展

Advance in the detection of PAHs in soil by laser-induced fluorescence spectroscopy

多环芳烃(PAHs)具有致癌、致畸、致突变特性,且能在多种介质中迁移和生物富集,给生态环境和人类健康带来严重威胁。土壤是PAHs在地表系统最重要的储库和中转站,开展土壤中PAHs污染快速原位在线监测对土壤污染分布调查及污染修复有重要意义。激光诱导荧光光谱技术(LIF)具有灵敏度高、选择性强、非破坏性检测等优点,在土壤PAHs原位在线检测领域发展迅速。本文介绍了LIF检测系统的组成,LIF系统参数设置对土壤中PAHs检测影响,土壤环境因素对PAHs定量检测影响的校正抑制方法,土壤多组分PAHs的LIF光谱定量分析方法,以及LIF技术与其他新技术结合在原位检测环境中PAHs方面的应用,最后对LIF技术快速检测土壤PAHs的发展趋势进行展望。

Polycyclic aromatic hydrocarbons(PAHs)are carcinogenic,teratogenic,mutagenic,and can migrate and biologically accumulate in a variety of media,posing serious threat to the ecological environment and human health. Soil is the most important reservoir and transit station for PAHs in surface systems. It is of great significance to carry out the rapid in situ monitoring of PAHs in soil for the investigation of pollution distribution and pollution remediation. Laser-induced fluorescence spectroscopy technology(LIF)has the advantages of high sensitivity and selectivity,as well as non-destructive detection. It has developed rapidly in in-situ online detection of soil PAHs. In this paper,the composition of LIF detection system was described,the influence of LIF system parameter setting on detection of PAHs in soil,the correction and suppression methods for disturbance of soil environmental factors on the quantitative detection of PAHs,the quantitative analysis methods of multicomponent PAHs in soil,the application of LIF combined with other new technologies for detection of PAHs in the environment were reviewed. The development trend of PAHs rapid detection by LIF technology was proposed.