Geochemical cycling of trace elements in natural and perturbed environments, particularly redox-sensitive processes affecting metals and metalloids. Applications to mine tailings, coastal sediment, estuaries, and groundwater, as well reconstructions of past climate change in nearshore environments. More recent interest in the bridging of disciplines, including the health and social sciences, to address multi-faceted environmental problems.
Some of my projects include:
- Reconstruction of climate change along the west of coast of the Americas
- Geochemistry of cadmium and iron in coastal upwelling systems
- Mitigation of groundwater arsenic problem in Bangladesh
- Battling 'the Largest Mass Poisoning in History'
- Ocean Sediments Tell a Surprising Climate Story
- Pumping Draws Arsenic Toward a Big-City Aquifer
- Mapping Lead Hot Spots to Protect Children
- Natural Processes Can Limit Spread of Arsenic in Water, Says Study
- Columbia University Receives $16.9 Million Award from National Institute of Environmental Health Sciences
- New Technologies Reduce Exposure of Bangladeshi Villagers to Arsenic in Groundwater
- Fifty-Two Thousand Years of Marine Fertility Sheds New Light on Forces Behind Climate Change