Effect of spatial heterogeneity on rate of sedimentary O2 consumption reaction
| العنوان: | Effect of spatial heterogeneity on rate of sedimentary O2 consumption reaction |
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| المؤلفون: | Simonetta Rubol, Tanushree Dutta |
| المساهمون: | Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica, Universitat Politècnica de Catalunya. GHS - Grup d'Hidrologia Subterrània |
| المصدر: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Lecture Notes in Earth System Sciences ISBN: 9783642324079 |
| مصطلحات موضوعية: | Materials science, Analytical chemistry, Sediment, Matemàtiques i estadística::Matemàtica aplicada a les ciències [Àrees temàtiques de la UPC], Spatial heterogeneity, Reaction rate constant, Sòls -- Composició, Environmental chemistry, Sedimentary rock, Soil heterogeneity, Enginyeria civil::Geologia [Àrees temàtiques de la UPC], Saturation (chemistry), Metabolic activity, Spatial analysis |
| الوصف: | Soil is a complex natural system and exhibits heterogeneity both in space and time. In this study, we aim to investigate the effect of this spatially heterogeneous behavior of soil metabolic activity (measured as the rate of sedimentary \(\mathrm{{O}}_{2}\) consumption) on the effective time-averaged rate constant. To meet this objective, we used a novel optical sensor plus imaging technology called VisiSens (PreSens Precision Sensing) that gave us a unique opportunity to obtain percentage air saturation of the sediment in time and space using the images of the surface of the sediment at a set interval (every 20 s for 40 min). Each of these series of images (each consisting of 120 images) were analyzed using an image analysis software (ImajeJ) to extract the spatial data of \(\mathrm{{O}}_{2}\) saturation. For this study, we used fresh sediments collected from Llobregat (Barcelona, Spain) riverbed. The sediments were homogenized and monitored for percentage air upon addition of substrates containing glucose and humic substances. The results show that the rate of \(\mathrm{{O}}_{2}\) consumption is heterogeneous in space and therefore should be considered in the computation of the effective rate of sedimentary \(\mathrm{{O}}_{2}\) consumption for modeling purposes. |
| وصف الملف: | application/pdf |
| ردمك: | 978-3-642-32407-9 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3c7ff98d2f655423b9144cff3c20135 http://hdl.handle.net/2117/20239 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b3c7ff98d2f655423b9144cff3c20135 |
| قاعدة البيانات: | OpenAIRE |
| ردمك: | 9783642324079 |
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