| Title: | Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection |
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| 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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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.12 - Published Scientific Conference Contribution Abstract |
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| Organization: | UNG - University of Nova Gorica
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| 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. |
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| Keywords: | beam deflection spectrometry, diffusive gradients in thin-films, iron species |
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| Year of publishing: | 2019 |
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| PID: | 20.500.12556/RUNG-4885 |
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| COBISS.SI-ID: | 5413371 |
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| NUK URN: | URN:SI:UNG:REP:7SSRDBNF |
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| Publication date in RUNG: | 16.07.2019 |
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| Views: | 3392 |
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| Downloads: | 0 |
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