Traps has CO2: tailings of asbestos mines could be used to fight against global warming

The tailings sites in southern Quebec would have naturally sequestered nearly 1,8 million tonnes of atmospheric carbon dioxide (CO2) for a century. And this figure represents only a tiny fraction of the total sequestration potential offered by this sector, according to a study conducted at the Department of Geology and Geological Engineering at Laval University in Quebec.

In recent years, Professor Beaudoin has advocated carbon sequestration as a complement to reducing CO2 emissions and reducing energy consumption in pursuit of the Kyoto Protocol's goals. In Quebec, this third route could be through the residues of chrysotile (asbestos) mining. In fact, the magnesium contained in these residues reacts naturally with the atmospheric CO2 to form a mineral called hydromagnesite, in which the CO2 is immobilized in perpetuity. This reaction would reduce the quantity of CO2 in the atmosphere while regulating the case of mining residues that separate the landscape of asbestos and Estrie regions (southeastern Quebec).

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Sources: Jean Hamann - On the go, 28 / 04 / 2005 - Laval University
Editor: Nicolas Vaslier MONTREAL,

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