Passive Treatment System
nounPronunciation: /ˈpæsɪv ˈtritmənt ˈsɪstəm/
An engineered or semi-natural system that treats mine-impacted water using gravity-fed processes without mechanical equipment or chemical additives, such as wetlands, limestone channels, or settling ponds. These systems rely on biological, chemical, and physical processes to neutralize acidity and precipitate metals.
Plain English
A gravity-based water treatment method using natural processes like wetlands instead of pumps or chemicals.
Etymology & History
Usage
"The site implemented a passive treatment system consisting of limestone channels and iron-oxidizing wetlands to manage AMD."
Style guide notes: Capitalize when referring to specific installed systems; distinguish between constructed versus naturally occurring wetlands.
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Related Terms
Frequently Asked Questions
What are advantages of passive treatment over active systems?
Passive systems require no energy input, minimal maintenance, lower operational costs, and smaller carbon footprint.
Can passive systems treat all types of mine drainage?
Passive systems work best for low to moderate contamination; high-strength mine drainage often requires hybrid or active approaches.
Why Test Candidates on This?
Passive treatment systems are frequently evaluated for cost-effectiveness and long-term sustainability in reclamation design.
Required skill level: Mid