Permeable Reactive Barrier
nounPronunciation: /pərˈmiːəbəl riˈæktɪv ˈbæriər/
A passive subsurface structure filled with reactive material that allows contaminated groundwater to flow through while chemically or biologically transforming contaminants into harmless substances. Common reactive materials include zerovalent iron, limestone, and organic amendments that target specific contaminant classes.
Plain English
An underground wall that lets polluted groundwater pass through while cleaning it with chemical or biological reactions.
Etymology & History
Usage
"Engineers designed a permeable reactive barrier with zerovalent iron to intercept metal-laden groundwater from the abandoned mine."
Style guide notes: Use acronym 'PRB' only after first full mention; specify reactive material type in detailed discussions.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What reactive materials are commonly used?
Zerovalent iron, limestone, activated carbon, and organic amendments are selected based on target contaminant type.
How long do permeable reactive barriers last?
Lifespan ranges from 10 to 50+ years depending on contaminant loading, material reactivity, and clogging rates.
Why Test Candidates on This?
Permeable reactive barriers represent a cornerstone passive remediation technology for long-term AMD and metal-contamination management.
Required skill level: Senior