Mobilization of Metal(oid) Oxyanions through Circumneutral Mine Waste-Rock Drainage

Assessment of two kinetic tests to predict the acid mine drainage in waste rock samples of a uranium mine

Acid mine drainage is the result of the oxidation process of sulfide bearing rocks. This process occurs when the sulfide material is exposed to atmospheric conditions. Under these conditions, successive oxidation reactions yield sulfuric acid generating acidic waters. This problem becomes more serious when the surrounding rocks are not able to neutralize the acid. The low pH condition of the dr...

Advances in Acid Rock Drainage (ard) Characterisation of Mine Wastes

Research was carried out to improve acid rock drainage (ARD) prediction methodologies, focussing on resolving uncertainties in acid base accounting (ABA) methods. Advancements, their application, and interpretation are reported. Consideration of both net acid production potential (NAPP) and net acid generation (NAG) test results provide a more reliable routine screening technique than either te...

Study of Ni sorption onto Tio mine waste rock surfaces

0883-2927/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.apgeochem.2010.09.010 ⇑ Corresponding author. Fax: +1 819 797 4727. E-mail address: [email protected] (B. Plante). Sorption phenomena are known to play significant roles in metal mobility in mine drainage waters. The present study focuses on sorption phenomena controlling Ni concentrations in contaminated neutral drainage issue...

Acid Mine Drainage: Flow-Through Experiments Examining Pyrite Dissolution Rates

Preventing acid mine drainage from mine tailings

Mining activity always has high impact on its surroundings, being waste deposition the cause of multiple and complex problems to the environment. One of them is Acid Mine Drainage (AMD), causing acid water percolation through large areas in the mine site. Portugal was a prosper tungsten producer from the beginning of the XX century, having its apogee during World War II. Nowadays there are mill...