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SUMMARY:Freshwater Colloquium: Groundwater management in Northeast Wisconsin: Potential for geogenic metals mobilization
DESCRIPTION:Erin Berns-Herrboldt will present “Groundwater management in Northeast Wisconsin: Potential for geogenic metals mobilization” as part of the School of Freshwater Sciences Spring colloquium.\nDr. Erin Berns-Herrboldt is an Assistant Professor of Water Science at the University of Wisconsin – Green Bay. She completed her PhD in Civil Engineering in the Environmental and Water Resources Engineering Program at the University of Texas at Austin and conducted postdoctoral research at Oak Ridge National Laboratory. Her research experience includes studying the fate of organic groundwater contaminants\, biogeochemical controls on carbon release from Arctic permafrost soils\, metals release from aquifer sediments\, and nutrient cycling in stream hyporheic zones. \n\nGroundwater quality can be impacted by metals released from aquifer minerals\, potentially causing human health concerns. When aquifer sediments are relatively undisturbed\, metals bound to minerals remain stable\, but during transitions in water level – due to variations in groundwater recharge or over-pumping – metals can be released to groundwater. This project evaluates the history of groundwater use in the Northeast Wisconsin Groundwater Management Area (GMA) for the confined Cambrian-Ordovician aquifer\, and explores the potential for metals release due to oxidation during aquifer drawdown. \n \nTo evaluate these changes\, (1) groundwater was sampled across the GMA for evaluation of water chemistry\, (2) a monitoring well was installed to improve groundwater level monitoring in the southern portion of the GMA\, and (3) batch leaching experiments were conducted under oxic and anoxic conditions with rock cuttings from the newly installed monitoring well to evaluate potential for metals release. Initial leaching experiment results show that nickel and cobalt increased over time in oxic experiments\, but not in anoxic experiments\, and negligible arsenic was observed over the experimental timeframe. This study provides initial results that support improved understanding of metals release from oxidized GMA aquifer sediments. Findings from this study will inform the development of effective groundwater management strategies\, ensuring the sustainability and safety of water resources in the Northeast Wisconsin GMA. \n\nThe Spring 2025 Freshwater Colloquium series takes place in the GLRF Ballroom. Most talks this semester will involve the theme of Emerging Contaminants in Aquatic Environments. Please join us! \n\n\nThis presentation is open to students\, faculty\, staff\, alumni and the public. \n\n\n\n\n\n\n\n\n \n\nSpring 2025 Colloquium Series schedule. The Colloquium series creates a platform where students\, faculty\, and scientists discuss emergent issues related to freshwater science research. Invited speakers present specific topics of their research\, as well as policy\, commercial\, and industrial experiences. Everyone is welcome.
URL:https://uwm.edu/freshwater/event/freshwater-colloquium-groundwater-management-in-northeast-wisconsin-potential-for-geogenic-metals-mobilization/
LOCATION:School of Freshwater Sciences Ballroom\, First Floor\, 600 E Greenfield Avenue\, Milwaukee\, WI\, 53204
CATEGORIES:Alumni & Community,Career and Leadership Development,Faculty and Staff,Lectures Conferences and Symposiums,Public,Students,UWM Campus Events
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