Evaluation du comportement geochimique a long terme de rejets miniers a faible potentiel de generation d'acide a l'aide d'essais cinetiques

Acid mine drainage (AMD) is one of the most important environmental problems facing the mining industry. AMD occurs when sulphurous minerals oxidize upon contact with air and water to produce sulfuric acid. The acid produced reduces the water pH and promotes heavy metals mobility, which is hazardous to the surrounding environment. Remediation of acid producing mine sites is more expensive than the remediation of neutral or alkaline drainage mine sites. Therefore, it is necessary to accurately determine a waste potential for acidity production (PAG) in order to use disposal and remediation methods that are adapted to the mine site. The main objective of this study is the development or the modification of methods to determine the long term geochemical behaviour of low acidity potential (low AP) mill tailings. (Abstract shortened by UMI.)...