U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights

Practical Gas Sampling Method Enables Rapid Evaluation of all Major Dissolved Gases in Groundwater
Published: June 16, 2008
Posted: June 20, 2008

Researchers at the Oak Ridge National Laboratory recently developed a practical method to sample all major dissolved gases present in groundwater without the need for pumping groundwater to the surface or the need for multiple analytical methods to measure gas concentrations. Traditional dissolved gas sampling techniques in the field are labor intensive, time-consuming efforts. This new passive sampling technique requires little sampling effort, allowing researchers to quickly deploy, retrieve, and analyze gas samples from multiple locations. Concentrations of dissolved gases such as oxygen, hydrogen, nitrogen, carbon dioxide, methane, nitrous oxide, and carbon monoxide yield important information on microbial and chemical processes occurring in the subsurface. Microorganisms profoundly affect the transport of contaminants in the subsurface, and these methods can help identify which microbial processes are active in the subsurface. The sampling device is suspended in a well until it equilibrates with ambient conditions, and then it is removed for analysis in the laboratory. The technique is highly sensitive to trace levels of gases and can provide researchers and modelers with information on active microbial processes in the subsurface. Understanding which microbial processes are active at a specific field site will help in refining simulations of contaminant transport, understanding bioremediation, monitoring natural attenuation processes and devising new techniques to intercept and immobilize contaminants.

Reference: Environmental Science & Technology 42(10) 3766-3772, 2008.

Contact: Robert T. Anderson, SC-23.4, (301) 903-5549
Topic Areas:

  • Research Area: Subsurface Biogeochemical Research
  • Research Area: Microbes and Communities

Division: SC-23.1 Climate and Environmental Sciences Division, BER
      (formerly SC-23.4 Environmental Remediation Sciences Division, OBER)


BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Aug 24, 2019
New Approach for Studying How Microbes Influence Their Environment
A diverse group of scientists suggests a common framework and targeting of known microbial processes [more...]

Aug 08, 2019
Nutrient-Hungry Peatland Microbes Reduce Carbon Loss Under Warmer Conditions
Enzyme production in peatlands reduces carbon lost to respiration under future high temperatures. [more...]

Aug 05, 2019
Amazon Forest Response to CO2 Fertilization Dependent on Plant Phosphorus Acquisition
AmazonFACE Model Intercomparison. The Science Plant growth is dependent on the availabi [more...]

Jul 29, 2019
A Slippery Slope: Soil Carbon Destabilization
Carbon gain or loss depends on the balance between competing biological, chemical, and physical reac [more...]

Jul 15, 2019
Field Evaluation of Gas Analyzers for Measuring Ecosystem Fluxes
How gas analyzer type and correction method impact measured fluxes. The Science A side- [more...]

List all highlights (possible long download time)