. Earth tones-- : the book : federal science for sustainable development. Canada. Natural Resources Canada; Sustainable development; Développement durable. "â «r ^V*: Toxins in air and water til â *», ain on flic environment: acid mine drainage and hog manure ; Natural Resources Canada â A natural, chemical reaction with oxygen and water is changing sulfide minerals in copper, zinc, nickel, gold and uranium mines into acidic seepage containing concentrations of metals and dissolved salts. If left untreated, rain and snow melt carry the solution into surrounding bodies of water, possibl
. Earth tones-- : the book : federal science for sustainable development. Canada. Natural Resources Canada; Sustainable development; Développement durable. "â «r ^V*: Toxins in air and water til â *», ain on flic environment: acid mine drainage and hog manure ; Natural Resources Canada â A natural, chemical reaction with oxygen and water is changing sulfide minerals in copper, zinc, nickel, gold and uranium mines into acidic seepage containing concentrations of metals and dissolved salts. If left untreated, rain and snow melt carry the solution into surrounding bodies of water, possibly contaminating groundwater and damaging the health of plants, wildlife and fish. «u/. While mining companies collect and treat effluents and seepage from operating mines by using acid-neutralizing materials, such as calcite or lime, they can't continue to neutralize the acidic run-off that can persist for hundreds of years after mine closure. Operating treatment plants indefinitely isn't feasible, in part because they would generate an unmanageable volume of sludge. To find a solution, the Mine Environmental neutral Drainage (MEND) program was established in 1989 to develop scientifically based technologies to combat acidic drainage. Over the next 10 years, provincial and federal governments, together with the Canadian mining industry, spent over $ 17 million to reduce the costs associated with site clean-up by $400 million. Collaborative research has resulted in over 200 projects. Since it is difficult to stop seepage once sulfide mineral begins to react, prevention is the best strategy. ( J i .. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Canada. Agriculture and Agri-Food Canada. Research Branch. Strategic Promotion. [Ottawa] : Government of Canada
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