Resource recovery: emphasis on new technologies for the extraction and recovery of critical materials and rare earth elements Geochemistry of rare earth elements Unconventional Oil and Gas: Shale gas operations geochemistry, hydraulic fracturing, Enhanced oil recovery Energy and environment Geochemical phenomena under CO2 storage conditions in geologic formations, groundwater and shallow aquifers Characterization, fate, and remediation of oil-derived hydrocarbons in water, soil, and sediment Hazardous and toxic waste site remediation Water chemistry and geochemical modeling of aqueous systems