scholarly journals The Formation of Silicate-Stabilized Passivating Layers on Pyrite for Reduced Acid Rock Drainage

2017 ◽  
Vol 51 (19) ◽  
pp. 11317-11325 ◽  
Author(s):  
Rong Fan ◽  
Michael D. Short ◽  
Sheng-Jia Zeng ◽  
Gujie Qian ◽  
Jun Li ◽  
...  
Keyword(s):  
Acid Rock Drainage ◽  
Acid Rock

PREDICTING ACID ROCK DRAINAGE FROM A NICKEL MINE WASTE PILE AND METAL LEVELS IN SURROUNDING SOILS

2017 ◽  
Vol 16 (9) ◽  
pp. 2089-2096
Author(s):  
Artwell Kanda ◽  
George Nyamadzawo ◽  
Jephita Gotosa ◽  
Nathan Nyamutora ◽  
Willis Gwenzi
Keyword(s):  
Acid Rock Drainage ◽  
Mine Waste ◽  
Acid Rock ◽  
Metal Levels

Small-scale field evaluation of geochemical blending of waste rock to mitigate acid rock drainage potential

2021 ◽  
pp. geochem2021-066
Author(s):  
S.J. Day
Keyword(s):  
Acid Rock Drainage ◽  
Field Evaluation ◽  
Waste Rock ◽  
Small Scale ◽  
Proof Of Concept ◽  
Acidic Water ◽  
Acid Rock ◽  
Acid Generation ◽  
Acidic Waters ◽  
Critical Consideration

Blending of potentially acid generating (PAG) waste rock with non-PAG waste rock to create a rock mixture which performs as non-PAG is a possible approach to permanent prevention of acid rock drainage (ARD) for PAG waste rock. In 2012, a field weathering study using 300 kg samples was implemented at Teck Coal's Quintette Project located in northeastern British Columbia, Canada to test the prevention of acid generation in the PAG waste rock by dissolved carbonate leached from overlying non-PAG waste rock and direct neutralization of acidic water from PAG waste rock by contact with non-PAG waste rock.After eight years of monitoring the experiments, the layered non-PAG on PAG barrels provided proof-of-concept that as the thickness of the PAG layer increases relative to the thickness of the non-PAG layers, acidic waters are more likely to be produced. The PAG on non-PAG layering has resulted in non-acidic water and no indications of metal leaching despite accelerated oxidation in the PAG layer shown by sulphate loadings. The study has demonstrated that the scale of heterogeneity of PAG and non-PAG materials is a critical consideration for providing certainty that rock blends designed to be non-PAG will perform as non-PAG in perpetuity. This is contrary to the standard paradigm in which an excess of acid-consuming minerals is often considered sufficient alone to ensure ARD is not produced.

Geochemical Characterization for Prediction of Acid Rock Drainage Potential in Hydrothermal Deposit

2014 ◽  
pp. 773-779
Author(s):  
Rudy Sayoga Gautama ◽  
Ginting Jalu Kusuma ◽  
Dyah Firgiani ◽  
Salmawati Mustakar ◽  
Prasetyaningtyas Ekarini
Keyword(s):  
Acid Rock Drainage ◽  
Hydrothermal Deposit ◽  
Acid Rock ◽  
Geochemical Characterization

Chemical Stability of Acid Rock Drainage Treatment Sludge and Implications for Sludge Management

2006 ◽  
Vol 40 (6) ◽  
pp. 1984-1990 ◽  
Author(s):  
Danny M. McDonald ◽  
John A. Webb ◽  
Jeff Taylor
Keyword(s):  
Chemical Stability ◽  
Acid Rock Drainage ◽  
Sludge Management ◽  
Acid Rock

Environmental risk assessment of acid rock drainage under uncertainty: The probability bounds and PHREEQC approach

2016 ◽  
Vol 301 ◽  
pp. 187-196 ◽  
Author(s):  
Getnet D. Betrie ◽  
Rehan Sadiq ◽  
Craig Nichol ◽  
Kevin A. Morin ◽  
Solomon Tesfamariam
Keyword(s):  
Risk Assessment ◽  
Environmental Risk ◽  
Environmental Risk Assessment ◽  
Acid Rock Drainage ◽  
Acid Rock ◽  
Probability Bounds

scholarly journals Acid-rock drainage at Skytop, Centre County, Pennsylvania, 2004

2005 ◽  
Author(s):  
Jane M. Hammarstrom ◽  
Keith Brady ◽  
Charles A. Cravotta
Keyword(s):  
Acid Rock Drainage ◽  
Acid Rock
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