- Postdoctoral Researcher, Geobiology Agouron Institute Fellow, University of California – Riverside, 2008-2011
- PhD., Aquatic Geochemistry, INRS-ETE, University of Quebec, 2008
- M.Sc., Chemistry and Microbiology of Water, Universities of Poitiers and Pau, 2002
- B.Sc., Chemistry, University Joseph Fourier, 2001
I favor the removal of barriers between scientific disciplines, and thus consider myself as a biogeochemist at the crossover of chemistry, geology and biology, using interdisciplinary approaches to study dynamic aquatic systems, such as the Great Lakes.
My research area consists of identifying and characterizing reactions in aquatic ecosystems involving trace elements (molybdenum, rhenium, uranium, tungsten, vanadium, chromium, etc…), in order to decipher processes that govern the fate and transport of these trace metals in both modern and ancient aquatic systems. More specifically, I explore the biogeochemical cycling of trace metals through experimental geochemistry, analysis of diverse natural materials (water column, porewater, lacustrine and marine sediments, ancient black shales, micro-organisms), and transport-reaction modeling. My aim is to explore the molecular processes involved in the biogeochemical cycles of trace elements.
By using these integrative approaches, I want to improve our understanding of the paleo-environmental implications of trace-element behavior, such as their potential to illuminate how the chemistry of Earth’s surface has changed through geologic time, as well as the implications for modern societies—including environmental chemistry and identification of anthropogenic sources.
- Chappaz, A. and Curtis P.J. (2013) Integrating
Empirically Dissolved Organic Matter Quality for WHAM VI using the DOM
Optical Properties: A Case Study of Cu-A1-DOM Interactions.
Environmental Science & Technology. 47: 2001-2007.
- Dahl T.W.‡, Chappaz A.‡, Fitts
J.P. and Lyons T.W. (2013) Molybdenum reduction in a sulfidic lake:
Evidence from X-Ray Absorption Fine-Structure Spectroscopy. Geochimica
Cosmochimica Acta. 103, 213-231. ‡Joint first authors.
- Chappaz, A., Lyons T.W., Gordon G.W. and Anbar A.D.
(2012) Isotopic fingerprints of anthropogenic molybdenum in lake
sediments. Environmental Science & Technology. 46: 10934-10940.
- Chappaz A., Gobeil C. and Tessier A. (2010) Controls on uranium distribution in lake sediments. Geochimica Cosmochimica Acta. 74: 203-214.
- Chappaz A., Gobeil C. and Tessier A. (2008) Sequestration mechanisms and anthropogenic inputs of rhenium in sediments from Eastern Canada lakes. Geochimica Cosmochimica Acta. 72: 6027-6036.
- Chappaz A., Gobeil C. and Tessier A. (2008) Geochemical and anthropogenic enrichments of Mo in sediments from perennially oxic ans seasonally anoxic lakes in Eastern Canada. Geochimica Cosmochimica Acta. 72: 170-174.