Deducing the distribution of
terminal electron-accepting
processes (TEAPs) in hydrologically
diverse groundwater systems
Chappelle et al. (1995)
Water Resources Research, Vol 31, No. 2
Introduction
•The Importance
•The Problem
•The Alternative
I TEAPs It Real
• The Basics
• Water chem can determine TEAPs by
1. Tracking electron acceptor consumption
2. Tracking final product accumulation
3. Tracking intermediate product concentrations
• Previous studies fail to TEAPs it real
• Hydrogen (H2) concentrations an important
intermediate product indicator of TEAPs
PURPOSE
OF
THE
PAPER
Hierarchical Framework for Identifying TEAPs
STUDY
SITES
Black Creek Aquifer, South Carolina
Black Creek Aquifer,
South Carolina
Floridan Aquifer - Baldosta, Georgia
Floridan Aquifer - Baldosta, Georgia
Alluvial-Lacustrine Aquifers – San Joaquin Valley
Alluvial-Lacustrine Aquifers
San Joaquin Valley
Petroleum Hydrocarbon-Contaminated Aquifer:
Hanahan, South Carolina
Petroleum HydrocarbonContaminated Aquifer:
Hanahan, South Carolina
CONCLUSIONS
• The main, important observation is that H2
concentration ranges for different TEAPs are
consistent between the diverse hydrologic
systems studied
• H2 Concentrations are a useful indicator for
TEAPs and increase confidence when used in
conjunction with electron acceptor
consumption and final product production.