Geological Society of America

7 Geochemical Influences on Metal Contaminants in Subsurface Systems

Monday, 19 April 2021
8:00 AM - 12:00 PM
Missouri Geological Survey Room

ASSESSING THE FEASIBILITY OF A NOVEL GROUNDWATER TRACER, SODIUM 2-NAPHTHALENE SULFONATE, FOR ESTIMATING THE TOTAL FRACTION OF ORGANIC CARBON IN NATIVE SEDIMENTS

Paper number: 7-14
Program: Theme Sessions
Time: 11:35 AM – 11:45 AM

Authors

Jiyan Hatami Presenting Author
University of Wisconsin-Milwaukee, Milwaukee, WI
Charles Paradis
University of Wisconsin-Milwaukee, Milwaukee, WI
Anna M. Benko
University of Wisconsin-Milwaukee, Milwaukee, WI
Raymond Johnson
University of Wisconsin-Milwaukee, Milwaukee, WI
Nathan A. Conroy
Los Alamos National Laboratory, Los Alamos, NM
Paul W. Reimus
Los Alamos, NM
Tim Grundl
Univ Wisconsin-MilwaukeeDept Geosciences, Milwaukee, WI
Adam Schmidt
University of Wisconsin-Milwaukee, Milwaukee, WI
Cullen Meurer
University of Wisconsin-Milwaukee, Milwaukee, WI
Gabrielle Sulikowski
University of Wisconsin-Milwaukee, Milwaukee, WI

Abstract

Characterizing the fraction of organic carbon (f_OC)within an aquifer is an important component in developing an accurate conceptual model of contaminant fate and transport. Uranium is among the wide range of contaminants that are known to adsorb to organic carbon (OC), thus delaying its transport downgradient. While there are currently no widely used groundwater tracers for estimating the f_OC, preliminary data from both field scale tracer tests and batch microcosm experiments suggest that sodium 2-naphthalene sulfonate (2-NS) might adsorb to OC in the aquifer matrix, possibly providing a method to estimate the total f_OC. 2-NS is widely understood to adsorb to granular activated carbon (GAC), but there is little to no information on 2-NS adsorbing to OC in the literature. Experimental data from both the field and the lab will be presented to characterize the sorption and desorption behavior of 2-NS to native sediments with varying f_OC. It is hypothesized that the transport behavior of 2-NS as a reactive groundwater tracer can yield important information on the presence, magnitude, and distribution of OC in aquifers.

Geological Society of America Abstracts with Programs. Vol. 53, No. 3

doi: 10.1130/abs/2021NC-362849

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