Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
EVALUATION DE L'EFFET DU DEGRE DE SATURATION SUR LA DIFFUSION ET LA
 

Summary: EVALUATION DE L'EFFET DU DEGRE DE
SATURATION SUR LA DIFFUSION ET LA
CONSOMMATION D'OXYGENE DANS DES RESIDUS
MINIERS SULFUREUX
Mathieu Gosselin et Michel Aubertin
Département des génies civil, géologique et des mines, École Polytechnique de
Montréal, Montréal, Québec, Canada
Mamert Mbonimpa
Département des sciences appliquées, Université du Québec en Abitibi-
Témiscamingue, Rouyn-Noranda, Québec, Canada
ABSTRACT
Acid mine drainage (AMD) generated by tailings is the result of an oxidation of sulphidic minerals. In order to prevent the
production of AMD, it is necessary to understand the effect of various influence factors on the geochemical reactions
involved. This study focuses on the effect of the degree of saturation (Sr) on the value of the oxygen effective diffusion
coefficient (De) and reaction rate coefficient (Kr). These two material parameters are used in Fick's laws to analyse the
oxygen flux under partially saturated conditions. First, the experimental procedures developed to obtain De and Kr are
presented, together with the main results obtained on the reactive tailings from the closed Louvicourt mine. The
experimental values of De and Kr are then compared to values estimated from predictive models. A modification is
introduced into an existing model to take into account the influence of Sr on the value of Kr. The results from the tests
are also used to make numerical simulations of the transient and steady state oxygen distribution profile, which are

  

Source: Aubertin, Michel - Département des génies civil, géologique et des mines, École Polytechnique de Montréal

 

Collections: Engineering; Environmental Management and Restoration Technologies