Acid rock drainage occurs when rock with sulphide minerals interacts with oxygen. It causes a chemical reaction that produces sulphuric acid which can free naturally-occurring metals. Fortunately, modern science makes it easy to prevent ARD: just prevent that interaction.
#nspoli
#nspoli
The hill in the middle of the new highway 102/103 interchange was built to prevent acid rock drainage. The hill is excavated rock that is prone to ARD. It’s covered with a liner, dirt and eventually grass. This prevents air reaching the sulfides that cause ARD.
#nspoli #NS
#nspoli #NS
Acid rock drainage can occur at excavations like #mining or #construction. It can even be caused naturally, i.e. by a landslide. Most ARD in #NovaScotia is caused by construction because much of the #bedrock around #Halifax is prone to it.
#nspoli #NS #minerals #geology
#nspoli #NS #minerals #geology
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