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Title:Determination of bioavailable Fe redox fractions of sediment pore waters by DGT passive sampling and BDS detection
Authors:Budasheva, Hanna (Author)
Korte, Dorota (Author)
Bratkič, Arne (Author)
Franko, Mladen (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology: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
COBISS_ID:5413371 Link is opened in a new window
URN:URN:SI:UNG:REP:7SSRDBNF
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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
ISBN:978-5-6041187-1-9
Place of publishing:Book of Abstract 20-th International Conference on Photoacoustic and Photothermal Phenomena
Year of publishing:2019

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