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Title:Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection
Authors:ID Budasheva, Hanna, University of Nova Gorica (Author)
ID Korte, Dorota, University of Nova Gorica (Author)
ID Bratkič, Arne, Vrije Universiteit Brussel (Author)
ID Franko, Mladen, University of Nova Gorica (Author)
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Language:English
Work type:Not categorized
Typology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
Abstract:The bioavailability and toxicity of contaminants in sediments to benthic organisms depend on the speciation of the contaminant [1]. The level of iron supply to sediments creates contrasting chemical pathways, each producing distinctive mineral assemblag- es. Reliable measurement of Fe redox species (Fe2+ and Fe3+) in sediments is essential for studies of pollutants or trace-element cycling. This is, however, a difficult task, because the distribution of chemical species often changes during sampling and storage. In this work the Diffusive Gradients in Thin-films technique (DGT) is investigated as a passive sampling approach used in combination with photothermal beam deflection spectroscopy (BDS) as a detection method for determination of labile Fe-redox species in sediments and natural waters. DGT offers the advantage of pre-concentration of labile (i.e. bioavailable) Fe species from the total dissolved Fe pool in sediment pore waters [2]. The advantage of using BDS [3-4] is also in avoiding contamination by using additional steps as extraction or pre-concentration. Furthermore, combined DGT-BDS provides 2D information about distribution of Fe2+ and the total Fe content in the resin hydrogels [5]. The goal of this research is to show the repeatability of this technique for determining trace amounts of Fe redox species in environmental samples.
Keywords:beam deflection spectrometry, diffusive gradients in thin-films, iron species
Year of publishing:2019
PID:20.500.12556/RUNG-4885 New window
COBISS.SI-ID:5413371 New window
NUK URN:URN:SI:UNG:REP:7SSRDBNF
Publication date in RUNG:16.07.2019
Views:4802
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BUDASHEVA, Hanna, KORTE, Dorota, BRATKIČ, Arne and FRANKO, Mladen, 2019, Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection. In : Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection [online]. Published Scientific Conference Contribution Abstract. Book of Abstract 20-th International Conference on Photoacoustic and Photothermal Phenomena. 2019. [Accessed 9 April 2025]. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=4616
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Record is a part of a monograph

Title:Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection
Place of publishing:Book of Abstract 20-th International Conference on Photoacoustic and Photothermal Phenomena
Year of publishing:2019
ISBN:978-5-6041187-1-9

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