Passive Treatment Wetland
nounPronunciation: /ˈpæsɪv ˈtriːtmənt ˈwɛtlənd/
An engineered or constructed wetland system that treats mine drainage through biological and geochemical processes without mechanical pumping or chemical dosing. Plants, microorganisms, and substrate materials naturally neutralize acidity and remove dissolved metals.
Plain English
A vegetated wetland that naturally removes metals and acid from mine water using plants and soil chemistry instead of machines.
Etymology & History
Usage
"The reclamation plan incorporated three successive passive treatment wetlands planted with acid-tolerant species to reduce iron and aluminum loads."
Style guide notes: Distinguish between 'passive' (no external inputs) and 'active' treatment systems in all reclamation contexts.
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Related Terms
Frequently Asked Questions
How do passive treatment wetlands remove metals from mine water?
Substrate oxidation-reduction reactions, microbial activity, and plant uptake precipitate and sequester dissolved metals in sediments naturally.
What plants are suitable for passive treatment wetlands in cold climates?
Acid-tolerant species like Juncus, Carex, and Sphagnum moss survive in low-pH conditions while promoting metal precipitation.
Why Test Candidates on This?
Understanding passive treatment wetland design and effectiveness is essential for cost-effective long-term mine drainage management.
Required skill level: Mid