You are here:
Field Evaluation Of Arsenic Transport Across The Ground-Water/Surface Water Interface: Ground-Water Discharge And Iron Oxide Precipitation
Citation:
FORD, R. G., K. G. SCHECKEL, S. ACREE, R. Ross, B. Lien, P. Clark, AND B. SCROGGINS. Field Evaluation Of Arsenic Transport Across The Ground-Water/Surface Water Interface: Ground-Water Discharge And Iron Oxide Precipitation. Presented at American Chemical Society, 235th National Meeting, New Orleans, LA, April 06 - 10, 2008.
Impact/Purpose:
To examine the distribution of arsenic in ground water, surface water and sediments at a Superfund Site in the northeastern United States.
Description:
A field investigation was conducted to examine the distribution of arsenic in ground water, surface water, and sediments at a Superfund Site in the northeastern United States (see companion presentation by K. G. Scheckel et al). Ground-water discharge into the study area was characterized as having high ferrous iron and arsenic concentrations. Patterns in ground-water discharge were assessed via a network of vertically-nested wells, piezometers, and seepage meter deployments to map out small scale variations in discharge into the surface water body. These ground-water measurements were supplemented with vertical profiling of surface water chemistry and evaluation of arsenic sequestration during iron oxide precipitation at the sediment-water interface. The mineralogy of iron oxide precipitates was determined along with in-situ arsenic sorption characteristics. This information will be employed to inform decisions on the design of appropriate remedies to address the cleanup of ground water and sediments at the site.