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Gewählte Publikation:

Steiner, H; Staubmann, K; Allabashi, R; Fleischmann, N; Katzir, A; Reichlin, Y; Milzaikoff, B.
(2003): Online sensing of volatile organic compounds in groundwater using mid-infrared fibre optic evanescent wave spectroscopy: a pilot scale test.
Water Sci Technol. 2003; 47(2):121-126

A prototype sensing system for in-situ monitoring of volatile organic compounds in contaminated groundwater was tested at a pilot scale plant. The sensor consists of a commercially available Fourier transform infrared spectrometer, connected to a 6 m long infrared transparent silver halide fibre optic cable. A 10 cm long core-only section at the centre of the fibre is mounted on a sensor head and coated with a hydrophobic polymer layer, while the remaining fibre is protected by Teflon tubing and thus not in contact with the surrounding media. The sensor head was immersed into the monitoring wells of the pilot plant testing the sensor system under circumstances close to field conditions and typical for in-situ measurements. The pilot plant consists of a 1 m(3) cubic tank filled with gravel. A pump is used to circulate water horizontally through the tank, simulating a natural aquifer. The evolution of the concentration of analytes injected into the system is monitored with time using the developed prototype sensing system. The results are validated by corresponding sampling and analysis with headspace gas chromatography.
Autor*innen der BOKU Wien:
Allabashi Roza
Find related publications in this database (using NML MeSH Indexing)
Environmental Monitoring - methods
Optics and Photonics - methods
Organic Chemicals - analysis
Refuse Disposal - analysis
Soil Pollutants - analysis
Spectrum Analysis - methods
Volatilization - methods
Water Movements - methods
Water Pollutants, Chemical - analysis
Water Supply - analysis

Find related publications in this database (Keywords)
IR sensor
polymer coating
silver halide fibre
volatile organic compounds

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