Fall 2015 GEOC Sessions250th ACS National Meeting
Boston, MA: August 13-21, 2015
Structure & Reactivity of Mineral-Water Interfaces
Sebastien Kerisit, Pacific Northwest National Laboratory (Sebastien.Kerisit@pnnl.gov )
Stephanie Teich-McGoldrick, Sandia National Laboratories
Subsurface Geochemistry for Energy and the Environment
Catherine Peters, Princeton University (cap@Princeton.EDU )
Young-Shin Jun, Washington University in St. Louis (email@example.com)
Sustainable and effective stewardship of the subsurface environment and its energy resources is one of today's grand challenges. The subsurface provides vast energy resources as well as capacity for CO2 storage, nuclear and hazardous waste disposal, and intermittent energy storage. Common to all subsurface technologies is the need to understand, measure, characterize and predict geochemical processes and their role in controlling reactivity, mass transfer, and subsurface flows. Examples include interactions between hydrofracking fluids and shales that enable gas extraction but may also mobilize hazardous substances, clay mineral migration that serves to trap waste streams, mineral dissolution and precipitation that alters and adaptively manipulates flow permeability, and mineralization reactions that lead to long-term sequestration of CO2 and other substances. This session will highlight advancements in our understanding of geochemical processes in the context of energy and the environment of the subsurface. All types of contributions are welcome including experiments, field studies, imaging analyses, and modeling contributions, from the nano-scale to the continuum scale.
Confirmed invited speakers: Alexis Navarre-Sitchler, (Colorado School of Mines), Subhasis Ghoshal (McGill University), Athanasios Karamalidis (Carnegie Mellon University), Alexandra Hakala (National Energy Technology Lab), Jeff Fitts (Princeton University), Brian Ellis (University of Michigan), Sophia Hayes (Washington University in St. Louis)
Biogeochemical Cycling of Nutrients & Contaminants in Physically Complex Environments
Benjamin Kocar, MIT (firstname.lastname@example.org )
Physical and (bio)geochemical heterogeneity is inherent in soils and sediments, and often imparts overarching controls on the cycling of nutrients and contaminants within ecosystems. On the scale of nanometers to millimeters, (a)biotic processes transpiring amongst intricate assemblages of minerals, organic matter, solutions, and gases control the mobility and retention of chemicals. Further, the distribution of pore geometries control where advection or diffusion dominates, and steep biogeochemical gradients are observed where rates of (a)biotic solute depletion exceed rates of solute mass transfer. Thus, redox and other biogeochemical conditions may vary tremendously over millimeters or less. This session will focus on current progress made in deciphering (bio)geochemical processes in physically and/or (bio)geochemically heterogeneous systems that control the fate of nutrients, contaminants, and trace gases in soils and sediments. Examples include, but are not limited to, understanding contaminant mobility and retention in mineralogically complex systems, examining the role of diffusionally induced redox gradients on the fate of nutrients, and coupled physical-biogeochemical controls on greenhouse gas production.
Geochemistry Division: General Session