Skip to main content
Browse by:

Effective March 10, 2020, all Duke-sponsored events over 50 people have been cancelled, rescheduled, postponed or virtualized.
Please check with the event contact regarding event status. For more information, please see

CEE Seminar: Biogeochemical Controls on Mercury Methylation and Implications for in Situ Sediment Management Strategies at Berry's Creek Study Area, New Jersey

Event Image
Icon calendar
Tuesday, April 03, 2018
Icon time
12:00 pm - 1:00 pm
Icon speaker
Dimitri Vlassopoulos, Anchor QEA LLC, Portland, Oregon
Icon series
CEE Spring 2018 Seminar Series

Environmental risk at mercury (Hg) contaminated sediment sites derives mainly from methylmercury (MeHg) exposure and bioaccumulation. MeHg levels in sediments and porewater reflect a complex, dynamic and incompletely understood interplay between physical, geochemical and biological processes, and generally do not correlate well with total sediment Hg concentrations. MeHg is produced mainly by certain sulfate-reducing and iron-reducing microorganisms and can be demethylated via both abiotic and biotic pathways. In situ remediation approaches for mercury contaminated soils and sediments therefore have targeted (1) reducing the bioavailability of Hg to methylating microorganisms and/or (2) manipulating biogeochemical conditions to limit microbial activity related to net MeHg production. As part of extensive CERCLA site investigations conducted at the Berrys Creek Study Area (BCSA) in New Jersey, a conceptual biogeochemical framework integrating multiple lines of evidence and accounting for key aspects of Hg partitioning and MeHg production and partitioning was developed.....