Notes and News

November 8, 2018

The LGE puts on a workshop for students ages 10 – 12. In four experiments, students explore how water chemistry changes as water travels from the atmosphere to the hydrophere and to the lithosphere (

November 2, 2018

Dr. Noémie Janot visits the LGE!   Noemi is a postdoctoral researcher at the Laboratoire Interdisciplinaire des Environnements continentaux at the University de Lorraine. She gave a great seminar on organo-mineral interactions in the critical zone.

October 20, 2018

Our paper on Pb-Mn(III) but not Zn-Mn(III) exchange in biogenic manganese oxides was just accepted to Chemical Geology! Check out the beautiful STEM-EDX images. Congratulations Julia and Imelda.

September 17 – 19, 2018

Jackie and Laetitia head to Unisense’s Microsensor Workshop in Aarhus ( /????hus/), Denmark.  We’re looking forward to our new micro-profiling system!

September 14, 2018

Our Reply to the ‘Comment on “Crystal growth and aggregation in suspensions of ?-MnO2 nanoparticles: implications for surface reactivity”‘ by A. Manceau is now published in Environ. Sci.: Nano, 2018, 5, DOI: 10.1039/C8EN001.

August 28 – 29, 2018

Our two-day meeting on Carbon cycling and redox processes in soils and sediments brought together current and future collaborators using nanoSIMS, (cryo)-electron microscopy, synchrotron methods, electrochemistry and metabolomics to follow redox processes in soil systems.

August 20, 2018

Professor Marco Keiluweit visits the LGE!  Marco, professor of Soil and Microbial Biogeochemistry at UMass Amherst, joins the group for two weeks supported by a grant from the Herbette Foundation.  Marco will give two talks while here: “Mapping Carbon Flow through Soils:  Ecosystem and Global Impacts” and “Spatial variations in microbial processes controlling carbon oxidation rates in soils”!

August 19, 2018

Conferences !! Sassi attends the American Chemical Society Conference in Boston and gives a talk on his work on manganese oxide photoreduction.

August 12, 2018

Conferences !! JP goes to the Goldschmidt Geochemistry Conference and gives a talk on the “Relationship between carbon availability and biogenic manganese oxide formation”.

July 6, 2018

Julia defends her PhD thesis.  Congratulations Dr. Holguera-Gonzalez!

July 5, 2018

Dr. Juan Rodriguez from Uni Lima (Peru) and Dr. Caroline de Meyer (Eawag) visit us for a morning of talks on arsenic in groundwater in the Amazon.

July 4, 2018

Poster session for Bachelor student final projects!  Come learn about the impact of beavers on biogeochemical iron cycling (Theo); drinking water distribution and water quality in Lausanne (Luca); arsenic accumulation and speciation in rice (Nathalie): motor oil identification and degradation followed by FTIR spectroscopy (Adrien) and possible links between methlymercury exposure and Alzheimers disease (Fanny).  Congratulations!

June 24, 2018

Conferences !! Jackie goes to Holderness, New Hampshire to attend the Gordon Conference on Environmental Sciences: Water.

June 18, 2018

Katayoon, co-advised by JP and Torsten Vennemann defends her Master’s thesisAssessing the water quality of an agricultural watershed using geochemical & isotopic analyses”.  Interesting spatial analysis of nitrate concentrations and sources in the aquifer below Montricher (VD), which supplies the drinking water for Morges (VD). Congratulations!

June 15, 2018

Our paper on Cr(VI) uptake and reduction by biogenic iron (oxyhydr)oxides is now published in Environmental Science: Processes and Impacts (10.1039/C8EM00149A). Congratulations Andrew and Mathilde.

June 13, 2018

Conferences !! The LGE (Sassi, Debra, & JP) goes to the Interfaces Against Pollution Conference in La Grande Motte.

June 6-8, 2018

Off to Le Chartreuse for our (now annual!) LG3 meeting (Gitte pour la Geochimie entre Grenoble et Lausanne). Excellent chalet, ideas, talks, food and teamwork!  

June 3, 2018

Professor Tina Voelker visits the LGE! Tina, professor of Chemistry at the Colorado School of Mines, presented her work on extracellular production of reactive oxygen species by aquatic microorganisms.