Field evidence for flow reduction through a zero-valent iron permeable reactive barrier

R. L. Johnson, R. B. Thoms, R. O'Brien Johnson, T. Krug

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

The combination of detailed multilevel ground water geochemistry samples, a natural-gradient tracer test, minislug tests, and a numerical flow and transport model was used to examine flow through a zero-valent iron permeable reactive barrier (PRB) installed to remove explosives from ground water. After 20 months of operation, the PRB continued to completely remove explosives from the ground water flowing through it. However, the data indicate that a portion of ground water flow was being diverted beneath the PRB. Ground water geochemistry was significantly altered by the PRB, and concentrations of some ions, including sulfate, carbonate, and calcium, were substantially reduced due to precipitation. Field data and numerical model results indicate that, after 20 months of operation, flow through the PRB was reduced to approximately one-third of its expected value.

Original languageEnglish (US)
Pages (from-to)47-55
Number of pages9
JournalGround Water Monitoring and Remediation
Volume28
Issue number3
DOIs
StatePublished - Jun 1 2008

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

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