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Related Experiment Videos

A modular injection system, multilevel sampler, and manifold for tracer tests.

Brian J Mailloux1, Mark E Fuller, George F Rose

  • 1Department of Geosciences, Princeton University, Princeton, NJ 08544, USA. bjm2103@columbia.edu

Ground Water
|December 3, 2003
PubMed
Summary

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New ground water injection and sampling systems were developed for bacterial transport experiments. These systems enable high-frequency, high-density sampling in aquifers, crucial for tracer and push-pull studies.

Area of Science:

  • Environmental Science
  • Hydrogeology
  • Microbiology

Background:

  • Bacterial transport experiments in aquifers require precise ground water injection and sampling.
  • Existing methods can be limited by aquifer heterogeneity and sampling disturbances.

Purpose of the Study:

  • To develop and evaluate novel ground water injection and sampling systems for bacterial transport studies.
  • To address limitations of existing methods in homogenous and heterogeneous surficial aquifers.

Main Methods:

  • Designed two ground water injection systems (large single tank, dynamic mixing tank) for stable water quality.
  • Developed two multilevel sampler (MLS) types: permanent and a novel removable MLS with hydraulically isolated ports.
  • Implemented a low-cost vacuum manifold system for efficient sampling using centrifuge tubes.

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Main Results:

  • Injection systems delivered large volumes of amended ground water without altering key water quality parameters.
  • Permanent MLSs were suitable for homogenous aquifers but caused mixing in heterogeneous ones.
  • The novel removable MLS effectively isolated sampling ports, preventing vertical mixing.
  • The integrated system facilitated collection of over 3000 samples per campaign with high efficiency.

Conclusions:

  • The developed integrated system provides a robust solution for ground water injection and high-density sampling.
  • The novel removable MLS is particularly valuable for heterogeneous aquifers.
  • The system is highly applicable to ground water tracer, injection, and push-pull experiments.