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Updated: Jun 19, 2026

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

Monitored natural attenuation.

Kirsten S Jørgensen1, Jani M Salminen, Katarina Björklöf

  • 1Finnish Environment Institute, Helsinki, Finland.

Methods in Molecular Biology (Clifton, N.J.)
|November 3, 2009
PubMed
Summary
This summary is machine-generated.

Monitored natural attenuation (MNA) uses natural processes to clean up soil and groundwater. Microbial activity and molecular methods help assess contaminant degradation, crucial for effective in situ remediation.

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Published on: July 4, 2014

Area of Science:

  • Environmental Science
  • Environmental Engineering
  • Microbiology

Background:

  • Monitored natural attenuation (MNA) is an in situ remediation strategy.
  • It leverages naturally occurring processes to reduce contaminant mass and concentration in soil and groundwater.
  • Contaminant degradation occurs through both aerobic and anaerobic microbial pathways.

Purpose of the Study:

  • To assess the effectiveness of microbial activity measurements and molecular biology methods for evaluating natural attenuation.
  • To understand the importance of site conditions and sampling in interpreting remediation data.
  • To compare the utility of activity measurements versus molecular methods for contaminant fate modeling.

Main Methods:

  • Microbial activity measurements
  • Molecular biology techniques
  • Chemical analyses
  • Site condition assessment

Main Results:

  • Both aerobic and anaerobic microbial processes contribute to contaminant degradation.
  • Activity measurements can inform contaminant fate modeling, though with limitations.
  • Molecular methods provide rapid, qualitative insights into in situ microbial communities and gene abundances, avoiding laboratory incubation biases.

Conclusions:

  • Accurate site characterization and sampling are vital for linking analytical results to in situ conditions.
  • A combination of chemical analyses, microbial activity, and molecular methods offers a comprehensive approach to assessing natural attenuation.
  • Molecular methods are valuable for their speed and ability to characterize native microbial communities.