Welcome to the Molecular Geochemistry Laboratory

If chemistry is the central science, then geochemistry is the central science as applied to understanding the natural world around us.

Geochemists seek to answer questions relating to the evolution of life on Earth and how metalloenzymes may have evolved, the chemistry of the oceans and how they are affected by global warming, the interplay between flora, fauna and the environment in chemical terms, how pollutants interact with soils and minerals, and how radioactive waste can be securely stored for millennia. We do this by connecting the very big — mountains — with the very small — atoms and molecules, and the very fast — fundamental reactions — with the often very slow — weathering

If you share our passion for understanding and explaining how the world works — join us! To find out about opportunities in our laboratory, contact one of the group leaders: Erik BjörnJean-François BoilyMichael Holmboe, C. André Ohlin, Andrey Shchukarev, and Staffan Sjöberg.

Postdoctoral scholarship (2 years) in nanoparticulate structures of trace metals in Erik Björn’s group 

Erik Björn’s group is announcing a 2 years postdoctoral scholarship within a project focused on nanoparticulate structures of trace metals. The project concerns both method developments to characterize trace metal nanoparticles using single-particle ICP-MS (sp ICP-MS) and size-exclusion chromatography ICP-MS (SEC ICP-MS), and biogeochemical studies of naturally formed nanoparticles in pore waters from sediments and soils.

Welcome with your application by 12th of July 2026, which you submit via this link!

New paper shows dual effects of terrestrial organic matter on methylmercury bioaccumulation

A new study from Erik Björn’s research group demonstrates how the input of terrestrial organic matter influences methylmercury accumulation in coastal planktonic food webs through two opposing processes: (1) increased concentration of thiol functional groups associated with the terrestrial organic matter suppresses methylmercury incorporation at the base of the food web, through the formation of thermodynamically stable methylmercury-thiol complexes with low bioavailability; (2) brownification of the water phase enhances methylmercury biomagnification, through enhanced heterotrophic bacteria production causing a longer food web. Understanding the net outcome of these two processes is essential for predicting methylmercury concentrations in coastal food webs under changing inputs of terrestrial organic matter.

Documentary on mercury and climate research

The new documentary Fjords Frontiers: Digging into the Future of Climate Change, presents recent mercury and climate research by the teams of Eric Capo and Erik Björn at Umeå University. The documentary shows field research conducted at the Norwegian fjord Rossfjordsvatnet. The water mass in this fjord is redox-stratified with declining oxygen, and increasing hydrogen sulfide, concentrations at increasing depth. The research aims to understand how the expansion of oxygen deficiency in coastal seas may impact mercury biogeochemistry and microbial metabolisms.

The research is funded by the Swedish Research Council, The Swedish research council FORMAS and the Kempe Foundations.

August News on Boily “Ice in Rust” and “MgO Carbonation” Research Programs

Papers in press:

Chen T., Bui Thi. T.M., Luo T., Cheng W., Hanna, K. Boily J.-F. 2024. Redox-driven formation of Mn(III) in ice. Environ. Sci. Technol. paper here

Chen T., Boily J.-F., Hanna K. 2024. Transient adsorption of zwitterionic fluoroquinolones on Goethite during freeze-thaw cycles. ACS ES&T Water paper here

Luo T., Chen T., Cheng W., Lasabatère L., Boily, J.-F., Hanna K. 2024 Impact of water saturation on the fate and mobility of antibiotics in reactive porous geomedia. Environ. Sci. Technol.

Upcoming Oral Presentation at the 2024 Goldschmidt Conference in Chicago:

Sebaaly A., van Rijn F., Boily J.-F. Oxalate Driven Goethite Dissolution in Cold, Dark, Acidic Environments. Goldschmidt Conference. August 19, 2024.

https://conf.goldschmidt.info/goldschmidt/2024/meetingapp.cgi/Paper/22879

New Group Members

Romana Szakal (PhD student) November 2024
Maria Arizaleta (Postdoc) February 2025
Tao Chen (Postdoc) December 2024