Benoît Plante

Université du Québec en Abitibi-Témiscamingue

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Mostafa Benzaazoua

Université du Québec en Abitibi-Témiscamingue

Bruno Bussière

Université du Québec en Abitibi-Témiscamingue

Isabelle Demers

Université du Québec en Abitibi-Témiscamingue

Hassan Bouzahzah

University of Liège

Aurélie Chopard

Agnico Eagle (Canada)

Mohamed Edahbi

Université du Québec en Abitibi-Témiscamingue

Georges Beaudoin

Université Laval

Benjamin De Castro

Université du Québec en Abitibi-Témiscamingue

Michel Aubertin

Polytechnique Montréal

Pierre-Philippe Dupont

Royal Canadian Navy

Cooperative Institutions

Université du Québec en Abitibi-Témiscamingue

Université Laval

Polytechnique Montréal

Natural Sciences and Engineering Research Council

Institut National de la Recherche Scientifique

Université de Montréal

University of British Columbia

Centre National de la Recherche Scientifique

Geological Survey of Canada

Agnico Eagle (Canada)

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Probing cleaner production opportunities of the Lac Tio pyrite-enriched tailings generated to alleviate sulfur dioxide emissions

Journal of Cleaner Production (2022)

Youssef Toubri Benoît Plante Isabelle Demers Mathieu Fillion

Roasting

Ilmenite

Mineral processing

10.1016/j.jclepro.2022.132027

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Citations (10)

Technical note adaptation of Pierre’s Gy theory of sampling for polished section preparation geared towards automated mineralogical analysis

Minerals Engineering (2022)

Benjamin De Castro Denis Marcotte Aurélie Chopard Benoît Plante Mostafa Benzaazoua

Characterization

10.1016/j.mineng.2022.107795

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Citations (3)

A contribution to improve the calculation of the acid generating potential of mining wastes

Chemosphere (2017)

Aurélie Chopard Mostafa Benzaazoua Hassan Bouzahzah Benoît Plante Philippe Marion

Arsenopyrite

Sulfide Minerals

Acid Mine Drainage

10.1016/j.chemosphere.2017.02.036

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Citations (26)

Mine Waste Rock: Insights for Sustainable Hydrogeochemical Management

Minerals (2020)

Bas Vriens Benoît Plante Nicolas Seigneur Heather E. Jamieson

Mismanagement of mine waste rock can mobilize acidity, metal (loid)s, and other contaminants, and thereby negatively affect downstream environments. Hence, strategic long-term planning is required to prevent and mitigate deleterious environmental impacts. Technical frameworks to support waste-rock management have existed for decades and typically combine static and kinetic testing, field-scale experiments, and sometimes reactive-transport models. Yet, the design and implementation of robust long-term solutions remains challenging to date, due to site-specificity in the generated waste rock and local weathering conditions, physicochemical heterogeneity in large-scale systems, and the intricate coupling between chemical kinetics and mass- and heat-transfer processes. This work reviews recent advances in our understanding of the hydrogeochemical behavior of mine waste rock, including improved laboratory testing procedures, innovative analytical techniques, multi-scale field investigations, and reactive-transport modeling. Remaining knowledge-gaps pertaining to the processes involved in mine waste weathering and their parameterization are identified. Practical and sustainable waste-rock management decisions can to a large extent be informed by evidence-based simplification of complex waste-rock systems and through targeted quantification of a limited number of physicochemical parameters. Future research on the key (bio)geochemical processes and transport dynamics in waste-rock piles is essential to further optimize management and minimize potential negative environmental impacts.

10.3390/min10090728

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Citations (85)

Geoenvironmental characterization of two REE deposits: the Montviel carbonatites and Kipawa silicates, Quebec Canada

IOP Conference Series Earth and Environmental Science (2022)

Mohamed Edahbi Benoît Plante M Benzaazoua Alain Cayer

Abstract Drainage water quality is the significant environmental concern for the rare earth elements (REE) mining industry. REE deposits are associated with other metals and radioactive bearing minerals. REE mining and refining activities can generate significant quantities of liquid and solid wastes. Therefore, a long-term integrated approach covering the full mine-life cycle is required to mitigate possible environmental concerns. In the present study, two REE concentrates were prepared and all deposit lithologies of carbonatites and silicates sampled and investigated for their mineralogy, geochemistry, and their environmental behavior using kinetic testing. For the Montviel carbonatite (enriched in light rare earth elements, or LREE), the majority of REE-bearing minerals are associated with carbonates (i.e., monazite, kukharenkoite, burbankite, etc.), whereas the REE-bearing minerals associated with the Kipawa silicates (enriched in heavy rare earth elements, or HREE) are fluorbritholite, eudyalite, mosandrite, etc. The kinetic tests showed a neutral to alkaline pH of leachates and a low leachability of REE (carbonatites <140 μg/L; silicates <15 μg/L) with a higher mobility of HREE than LREE. The reactivity of REE carbonates are one to two orders of magnitude higher than REE silicates. For sustainable mineral development, geological and environmental data was integrated into the geometallurgical model to identify and control the environmental risks associated with mining those two deposits.

Carbonatite

Rare-earth element

Lithology

Nepheline syenite

10.1088/1755-1315/1090/1/012013

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Citations (0)

Mobility of rare earth elements in mine drainage: Influence of iron oxides, carbonates, and phosphates

Chemosphere (2018)

Mohamed Edahbi Benoît Plante Mostafa Benzaazoua Matthew J. Ward Mia Pelletier

XANES

10.1016/j.chemosphere.2018.02.054

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Citations (35)

A quantitative approach for the estimation of the “fizz rating” parameter in the acid-base accounting tests: A new adaptations of the Sobek test

Journal of Geochemical Exploration (2015)

Hassan Bouzahzah Mostafa Benzaazoua Benoît Plante Bruno Bussière

Hydrochloric acid

Sample (material)

Base (topology)

Acid–base titration

10.1016/j.gexplo.2015.03.003

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Citations (44)

Laboratory Study of Highly Pyritic Tailings Submerged Beneath a Water Cover Under Various Hydrodynamic Conditions

Mine Water and the Environment (2014)

Akué Sylvette Awoh Mamert Mbonimpa Bruno Bussière Benoît Plante Hassan Bouzahzah

Acid Mine Drainage

10.1007/s10230-014-0264-x

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Citations (7)

CIL Gold Loss Characterization within Oxidized Leach Tails: Creating a Synergistic Approach between Mineralogical Characterization, Diagnostic Leach Tests, and Preg-Robbing Tests

Minerals (2019)

Mohamed Edahbi Raphaël Mermillod-Blondin Benoît Plante Mostafa Benzaazoua

A double refractory gold ore contains gold particles locked in sulphides, solid-solution in arsenopyrite, and preg-robbing material such as carbonaceous matter, and so on. The diagnostic leach test (DLT) and preg-robbing (PR) approaches are widely used to investigate the occurrence and the distribution of refractory gold. DLT serves to qualitatively evaluate the gold occurrences within the ore. Preg-robbing, or the ore’s capacity to fix dissolved gold, is evaluated to determine physical surface interactions (preg-borrowing) and chemical interactions (preg-robbing). The objective of this project is to characterize the refractory gold in Agnico Eagle Mine’s Kittilä ore using the DLT and PRT approaches coupled with mineralogical analyses to confirm testing. The studied material was sampled from the metallurgical circuit following carbon in leach (CIL) treatment at the outlet of the autoclave in order to investigate the effect of the autoclave treatment on the occurrence and distribution of gold. Different reagents were used in the DLT procedure: sodium carbonate (Na2CO3), sodium hydroxide (NaOH), hydrochloric acid (HCl), and nitric acid (HNO3). The final residue was roasted at a temperature of around 900 °C. These reagents were selected based on the mineralogical composition of the studied samples. After each leaching test/roasting, cyanide leaching with activated carbon was required to recover gold cyanide. The results show that gold is present in two forms (native and/or refractory): to a small extent in its native form and in its refractory form as association with sulfide minerals (i.e., arsenopyrite and pyrite) and autoclave secondary minerals that have been produced during the oxidation and neutralization processes such as iron oxides, iron sulfates, and calcium sulfate (i.e., hematite and jarosite), along with carbonaceous matter. The results of DLT indicate that 25–35% of the gold in the tails is nonrecoverable, as it is locked in silicates, and 20–40% is autoclave products. A regrind can help to mitigate the gold losses by liberating the Au-bearing sulphide minerals encapsulated within silicates.

Arsenopyrite

Gold cyanidation

Roasting

Autoclave

Nitric acid

Gold extraction

Sodium cyanide

10.3390/min9090557

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Citations (9)

Kinetic Testing for Oxidation Acceleration and Passivation of Sulfides in Waste Rock Piles to Reduce Contaminated Neutral Drainage Generation Potential

Mine Water and the Environment (2020)