title: Determination of leachate compounds relevant for landfill aftercare using FT-IR spectroscopy.
abstract: Controlling and monitoring of emissions from municipal solid waste (MSW) landfills is important to reduce environmental damage and health risks. Therefore, simple and meaningful monitoring tools are required. This paper presents how Fourier Transform Infrared (FT-IR) Spectroscopy can be used to monitor leachate from various landfill sites. The composition of percolated leachate provides information about reactivity or stability of organic matter in landfills. Chemical compounds of investigated leachate are depicted by distinct spectral pattern. Partial least squares regression (PLS-R) models, a multivariate analysis tool, were developed based on infrared spectra to determine simultaneously conventional parameters such as ammonium, nitrate, sulfate, and dissolved organic carbon. The developed models are appropriate for application in waste management practice with respect to their excellent coefficients of determination, namely R(2)=0.99, 0.99, 0.98, and 0.98, their low errors of cross-validation and their high ratios of performance to deviation (RPD=9.3, 12.5, 6.5, 7.3). Thus, FT-IR spectroscopy turned out to be a reliable, time-saving tool to determine four parameters relevant for landfill aftercare monitoring by one single easy adaptable measurement.
authors.affiliation: Institute of Waste Management, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Muthgasse 107, 1190 Vienna, Austria.
authors.forename: Sabine
authors.initials: S
authors.lastname: Lenz
authors.affiliation: Institute of Waste Management, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Muthgasse 107, 1190 Vienna, Austria. Electronic address: katharina.boehm@boku.ac.at.
authors.forename: Katharina
authors.initials: K
authors.lastname: Böhm
authors.affiliation: Institute of Waste Management, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Muthgasse 107, 1190 Vienna, Austria.
authors.forename: Reinhold
authors.initials: R
authors.lastname: Ottner
authors.affiliation: Institute of Waste Management, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Muthgasse 107, 1190 Vienna, Austria.
authors.forename: Marion
authors.initials: M
authors.lastname: Huber-Humer
mesh_terms: D004784:Environmental Monitoring; D008962:Models, Theoretical; D015999:Multivariate Analysis; D012037:Refuse Disposal / Q000379:methods*; D062611:Solid Waste; D017550:Spectroscopy, Fourier Transform Infrared; D064091:Waste Disposal Facilities; D018505:Waste Management; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D062611:Solid Waste; D014874:Water Pollutants, Chemical
keywords: Ammonium; DOC; FT-IR; Landfill leachate; Nitrate; PLS-R; Sulfate