Applications of a laser-induced fluorescence spectroscopy sensor in aquatic systems

The use of laser-induced fluorescence spectroscopy (LIFS) is fairly accepted as a fast and reliable method for the online detection of contaminations with polycyclic aromatic hydrocarbons (PAHs) and oil in groundwater and soils. Our work was focussed not only on the assessment of those contaminations, but on the use of LIFS as a generic tool to assess subsurface contaminations and aquifer properties. Pattern recognition techniques were successfully applied to map contaminant plumes surrounding waste disposal sites. Remediation activities at a former gas plant site were monitored using a sensor system based on time-resolved fluorescence spectroscopy. Tracer investigations in the saturated and unsaturated zone were enhanced due to the small time intervals between the single measurements. The determination of single analytes (e.g. pyrene, benzo(a)pyrene) out of a complex mixture of fluorescent compounds was possible by taking advantage of the fluorescence decay-times and by applying a site-specific calibration.

[1]  R. Niessner,et al.  Application of time-resolved, laser-induced and fiber-optically guided fluorescence for monitoring of a PAH-contaminated remediation site , 1996 .

[2]  Stephen H. Lieberman,et al.  Optimization of the optical characteristics of a fiber-optic-guided laser fluorescence technique for the in-situ evaluation of fuels in soils , 1992, Photonics West - Lasers and Applications in Science and Engineering.

[3]  M. Borkovec,et al.  Colloid-facilitated transport of strongly sorbing contaminants in natural porous media : A laboratory column study , 1996 .

[4]  Miguel Valcárcel,et al.  Screening of Polycyclic Aromatic Hydrocarbons in Soil by On-Line Fiber-Optic-Interfaced Supercritical Fluid Extraction Spectrofluorometry , 1996 .

[5]  Stanley M. Klainer,et al.  Feasibility of using fiber optics for monitoring groundwater contaminants. II. Organic chloride optrode , 1983 .

[6]  Jonathan E. Kenny,et al.  Remote detection of groundwater contaminants using far-ultraviolet laser-induced fluorescence , 1985 .

[7]  R. Niessner,et al.  Field Screening Europe , 1997 .

[8]  Wolfgang Schade,et al.  On-site laser probe for the detection of petroleum products in water and soil , 1996 .

[9]  Reinhard Niessner,et al.  Fibre-optic sensor for the determination of polynuclear aromatic hydrocarbons with time-resolved, laser-induced fluorescence , 1991 .

[10]  Joel M. Harris,et al.  Resolution of multicomponent fluorescence spectra by an emission wavelength-decay time data matrix , 1981 .

[11]  Hong Phuc Nguyen,et al.  Application of Geophysical Methods to Former Manufactured Gas Plant Sites: The Gaz De France Experience , 1997 .

[12]  Sujoy B. Roy,et al.  Remediating tar-contaminated soils at manufactured gas plant sites , 1994 .

[13]  Stephen H. Lieberman,et al.  Fluorescent response of fuels in soils: insights into fuel-soil interactions , 1993, Other Conferences.

[14]  R. Saint-Fort.  GROUND WATER CONTAMINATION BY ANTHROPOGENIC ORGANIC COMPOUNDS FROM WASTE DISPOSAL SITES : TRANSFORMATIONS AND BEHAVIOUR , 1991 .

[15]  Stephen H. Lieberman,et al.  Use Of Time-Resolved Spectral Fluorometry For Improving Specificity Of Fiber Optic-Based Chemical Sensors , 1990, Other Conferences.

[16]  D. M. Hayes,et al.  STATIC AND DYNAMIC FLUORESCENCE QUENCHING EXPERIMENTS FOR THE PHYSICAL CHEMISTRY LABORATORY , 1992 .