X-ray chemical imaging for assessing redox microsites within soils and sediments

Autor: Vincent Noël, Kristin Boye, Hannah R. Naughton, Emily M. Lacroix, Meret Aeppli, Naresh Kumar, Scott Fendorf, Samuel M. Webb

Publikováno v: Frontiers in Environmental Chemistry, Vol 5 (2024)

Redox reactions underlie several biogeochemical processes and are typically spatiotemporally heterogeneous in soils and sediments. However, redox heterogeneity has yet to be incorporated into mainstream conceptualizations and modeling of soil biogeoc

Externí odkaz: https://doaj.org/article/b4c6427d584944c5b5583081ed90c71e

Iron Reduction in Profundal Sediments of Ultraoligotrophic Lake Tahoe under Oxygen-Limited Conditions

Autor: Meret Aeppli, Geoffrey Schladow, Juan S. Lezama Pacheco, Scott Fendorf

Publikováno v: Environmental Science & Technology. 57:1529-1537

Increased periods of bottom water anoxia in deep temperate lakes due to decreasing frequency and depth of water column mixing in a warming climate may result in the reductive dissolution of iron minerals and increased flux of nutrients from the sedim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5137ca0ad00df74a53e54cc1fa93e681
https://doi.org/10.1021/acs.est.2c05714

Export of Organic Carbon from Reduced Fine-Grained Zones Governs Biogeochemical Reactivity in a Simulated Aquifer

Autor: Meret Aeppli, Tristan Babey, Maya Engel, Emily M. Lacroix, Bradley B. Tolar, Scott Fendorf, John R. Bargar, Kristin Boye

Publikováno v: Environmental Science & Technology. 56:2738-2746

Sediment interfaces in alluvial aquifers have a disproportionately large influence on biogeochemical activity and, therefore, on groundwater quality. Previous work showed that exports from fine-grained, organic-rich zones sustain reducing conditions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f9841a5faa1d7d290a1b37b8dd16498
https://doi.org/10.1021/acs.est.1c04664

Assessing Analytical Methods for the Rapid Detection of Lead Adulteration in the Global Spice Market

Autor: Alandra M. Lopez, Carla M. Nicolini, Meret Aeppli, Stephen P. Luby, Scott Fendorf, Jenna E. Forsyth

Publikováno v: Environmental sciencetechnology. 56(23)

Lead adulteration of spices, primarily via Pb chromate compounds, has been documented globally as a growing public health concern. Currently, Pb detection in spices relies primarily on expensive and time-consuming laboratory analyses. Advancing rapid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d08c42a8d161e355f695267ce98e6691
https://pubmed.ncbi.nlm.nih.gov/36343212

Thermodynamic controls on rates of iron oxide reduction by extracellular electron shuttles

Autor: Meret Aeppli, Sébastien Giroud, Sanja Vranic, Andreas Voegelin, Thomas B. Hofstetter, Michael Sander

Publikováno v: Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America, 119 (3)

Anaerobic microbial respiration in suboxic and anoxic environments often involves particulate ferric iron (oxyhydr-)oxides as terminal electron acceptors. To ensure efficient respiration, a widespread strategy among iron-reducing microorganisms is th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::920e9be4c6d39d282b27638ffe96c489
http://europepmc.org/articles/PMC8784112