Passive Treatment Systems for Treating Acid Mine Drainage
Passive Treatment Systems for Treating Acid Mine Drainage
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Active chemical treatment of AMD to remove metals and acidity is often an expensive,
long term liability. In recent years, a variety of passive treatment systems
have been developed that do not require continuous chemical inputs and that take
advantage of naturally occurring chemical and biological processes to cleanse contaminated
mine waters. The primary passive technologies include constructed wetlands,
anoxic limestone drains (ALD), successive alkalinity producing systems (SAPS),
limestone ponds, and open limestone channels (OLC).
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