ACID ROCK DRAINAGE MANUAL
Acid mine drainage - Wikipedia
Acid mine drainage, acid and metalliferous drainage (AMD), or acid rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines. Acid rock drainage occurs naturally within some environments as part of the rock weathering process but is exacerbated by large-scale earth disturbances characteristic of mining and other large construction activities, usually within rocksNomenclature · Occurrence · Chemistry · Effects · Identification and prediction[PDF]
ACID ROCK DRAINAGE PREDICTION MANUAL MEND Project
Acid Rock Drainage Prediction Manual 2 2. THE PROBLEM OF ACID ROCK DRAINAGE Acid rock drainage (ARD), often referred to as acid mine drainage (ARD), can be defined as the drainage that occurs as a result of natural oxidation of sulphide minerals contained in rock which is [PDF]
Technical Document: Acid Mine Drainage Prediction
Acid Mine Drainage Prediction compares acid rock drainage factors of waste rock piles and tailings impoundments. In examining this table, it is important to note that diffusion of oxygen into water is slow and, therefore, oxidation of iron sulfide is inhibited until the water level drops, which can occur periodically or seasonally in some cases.
Mend | Guidance Documents
MEND Guidance Documents Prediction: 1.1 Prediction Manual for Drainage Chemistry from Sulphidic Geologic Materials (2009) 1 Acid Rock Drainage Prediction Manual (1991) 1.1 Prediction and Prevention of ARD from a Geological and Mineralogical Perspective (1993) 1 Cold Regions Cover System Design Technical Guidance Document (2012)
The Global Acid Rock Drainage Guide PDF - about 126 MB; Development of the Global Acid Rock Drainage Guide. The development of the Global Acid Rock Drainage (GARD) Guide is sponsored by INAP with the support of the Global Alliance. The GARD Guide was created through the contributions of many individuals and organizations.
Acid Mine Drainage (AMD) / Acid Rock Drainage (ARD)
Acid Rock Drainage as a concern and part of all metals and mining operations. ARD is often mislabelled AMD or Acid Mine Drainage too. So, to better understand AMD and ARD, let’s begin by defining some terms like pH -The standard measure of acidity. The pH scale actually measures hydrogen ion concentration in water solutions. Pure neutral water has a pH of 7, acids have a pH less than 7 and[PDF]
EPA - What is Acid Mine Drainage
Acid Mine Drainage Mines built as early as the 1800’s were developed in a manner which utilized gravity drainage, to avoid excessive water accumulation in the mines As a result, water polluted by acid, iron, sulfur and aluminum drained away from the mines and into streams Results of Acid Mine DrainageAuthors: CorcoranAbout: Water pollution · Waste management · Wastewater · Surface water · Coal mining
2019 Annual Metal Leaching/Acid Rock Drainage Field School
Bill is the author of Guidelines for Metal Leaching and Acid Rock Drainage at Mine Sites in British Columbia (Price and Errington, 1998) and Prediction Manual of Drainage Chemistry from Sulphidic Geologic Materials (Price, 2009), which are documents used extensively in Canada and worldwide.
Acid Drainage - inap
The resulting effluent is known as acid drainage (also acid rock drainage (ARD) or acid mine drainage (AMD)). As the water becomes more acidic, its capacity to leach other elements from the rock, such as metals, increases and is known as metal leaching (ML).
Metal Leaching & Acid Rock Drainage Guidelines - Province
1.2 Metal Leaching and Acid Rock Drainage Metal1 leaching and acid generation are naturally occurring processes which may have negative impacts on the receiving environment. The environmental impact of ML/ARD will depend on their magnitude, the sensitivity of the receiving environment and the degree of neutralization, dilution and/or attenuation.
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