|North-Central Section (44th Annual) and South-Central Section (44th Annual) Joint Meeting (11–13 April 2010)|
|Paper No. 24-4|
|Presentation Time: 2:15 PM-2:30 PM|
METAL FATE AND TRANSPORT STUDIES AT THE TAR CREEK SUPERFUND SITE
SCHAIDER, Laurel A.1, SENN, David B.2, BRABANDER, Daniel J.3, MCCARTHY, Kathleen D.3, and SHINE, James P.1, (1) Department of Environmental Health, Harvard School of Public Health, 401 Park Drive, Boston, MA 02215, firstname.lastname@example.org, (2) Swiss Federal Institute of Aquatic Science and Technology (Eawag), Seestrasse 79, 6047 Kastanienbaum, Switzerland, (3) Department of Geosciences, Wellesley College, 106 Central Street, Wellesley, MA 02481|
The Tar Creek Superfund Site in northeastern
This presentation will provide an overview of our key findings. In particular, we found highly elevated concentrations of zinc, lead and cadmium in size-fractionated chat, especially in the smallest size fractions most relevant for human exposure, and a high degree of metal lability and bioaccessibility in those fractions. With respect to metal loadings into Tar Creek, chat pile runoff and AMD were both major contributors, with the relative contributions varying among metals. Subsurface groundwater inputs were also substantial contributors to flow and metal loading. In-stream transport of zinc, lead and cadmium were controlled to varying degrees by hydrous ferric oxides (HFOs), and solid-phase concentrations of HFO-bound metals were highly elevated, which has implications for downstream mobility and transport into the floodplain. Comparisons with historical data show that while metal concentrations in AMD have decreased substantially in recent decades, the chemical composition of chat pile runoff has remained relatively constant, suggesting less attenuation and increased relative importance of chat pile runoff. Our results highlight the importance of simultaneously addressing surface and subsurface contamination from both AMD and chat pile runoff in this watershed.
North-Central Section (44th Annual) and South-Central Section (44th Annual) Joint Meeting (11–13 April 2010)
General Information for this Meeting
|Presentation Handout (.pdf format, 2674.0 kb)|
|Session No. 24|
The Tri-State Mining District, a Decades Long Project: Progress, Challenges And Revelations
Branson Convention Center: Short Creek 1
1:30 PM-3:15 PM, Monday, 12 April 2010
Geological Society of America Abstracts with Programs, Vol. 42, No. 2, p. 74
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