Welcome to the Chappaz research group website! Our main investigation topic is the molecular (bio)geochemistry of trace elements in the environment. More specifically, we explore the trace metal and metalloid behaviors in lakes and oceans through experimental approach, analysis of diverse natural materials, and transport-reaction modeling. Our aims are to identify the reactions involving trace elements and to determine their speciation in modern and ancient aquatic systems. The implications of our research are extensive and contribute, for example, to a better understanding of how the chemistry of Earth’s oceans has changed through geologic time (paleo-environmental implications), and of how the human activities have drastically impacted the biogeochemical cycling of trace elements in the Great Lakes (modern-environmental implications). We are lucky to work in new research facilities (GEM lab: Geochemistry – Environment – Metal) that were entirely remodeled in 2013 to incorporate a trace metal clean room (ISO 6) allowing us to measure extremely low metal concentrations.
Congratulations to Anthony for being awarded a prestigious grant from the American Chemical Society – Petroleum Research Fund to investigate chromium speciation in ancient sedimentary rocks!!!
Busy month!! First, Meghan and Anthony went to Riverside to meet Dr. Timothy Lyons group where Meghan presented her latest results about Mo biogeochemistry. After they traveled to Sacramento to attend (and present their work) the Goldschmidt conference. Once back in Michigan, Meghan and Anthony drove to Cleveland to join a research cruise on Lake Erie. Aboard the RV Lake Guardian, they collected sediment cores and water column samples to study the trace metal geochemistry within that lake.
Last week of May, Meghan, Jacob and Anthony went to Argonne National Laboratory for 5 days. They worked at the Advanced Photon Source synchrotron facilities, more precisely on beamline 13 BMD. Thanks to Matt and Tony (beamline scientists) they were able to successfully conduct their experiments about Mo speciation in waters and sedimentary records. On a funny note, the ring is so large that you have to use tricyle to move around.