Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Acid-Rock Drainage at Skytop, Centre County, Pennsylvania, 2004
Acid-rock drainage is the water-quality hazard resulting from the oxidation of iron sulfide minerals. The pH of acid-rock drainage typically ranges from 2 to 4, but can range to values as high as 8 and as low as -5. Many metals are more mobile under acidic conditions when compared to neutral or alkaline conditions. Consequently, acid-rock drainage can contribute metals as well as acidity to water supplies and aquatic ecosystems. Acid-rock drainage that develops from ore, mine waste, or spoil piles associated with metal- or coal mines is called acid-mine drainage. Acid-mine drainage is a worldwide environmental problem. The iron-sulfide minerals (pyrite, marcasite, pyrrhotite) that cause acid-mine drainage occur in many types of mineral deposits, coal-bearing rocks, rocks unrelated to mineral or coal deposits, and in acid sulfate soils. When these iron-sulfide minerals are exposed to oxidative weathering processes by natural or human-induced conditions, such as landslides or construction projects, acid-rock drainage may develop. An acid-rock drainage problem developed at Skytop along Bald Eagle Mountain in central Pennsylvania, where construction of a new section of Interstate Highway 99 (I-99) between Port Matilda and State College exposed pyrite-rich rocks associated with a zinc-lead deposit within a sandstone ridge.
Acid-Rock Drainage at Skytop, Centre County, Pennsylvania, 2004
Acid-rock drainage is the water-quality hazard resulting from the oxidation of iron sulfide minerals. The pH of acid-rock drainage typically ranges from 2 to 4, but can range to values as high as 8 and as low as -5. Many metals are more mobile under acidic conditions when compared to neutral or alkaline conditions. Consequently, acid-rock drainage can contribute metals as well as acidity to water supplies and aquatic ecosystems. Acid-rock drainage that develops from ore, mine waste, or spoil piles associated with metal- or coal mines is called acid-mine drainage. Acid-mine drainage is a worldwide environmental problem. The iron-sulfide minerals (pyrite, marcasite, pyrrhotite) that cause acid-mine drainage occur in many types of mineral deposits, coal-bearing rocks, rocks unrelated to mineral or coal deposits, and in acid sulfate soils. When these iron-sulfide minerals are exposed to oxidative weathering processes by natural or human-induced conditions, such as landslides or construction projects, acid-rock drainage may develop. An acid-rock drainage problem developed at Skytop along Bald Eagle Mountain in central Pennsylvania, where construction of a new section of Interstate Highway 99 (I-99) between Port Matilda and State College exposed pyrite-rich rocks associated with a zinc-lead deposit within a sandstone ridge.
Acid-Rock Drainage at Skytop, Centre County, Pennsylvania, 2004
J. M. Hammarstrom (Autor:in) / K. Brady (Autor:in) / C. A. Cravotta (Autor:in)
2004
50 pages
Report
Keine Angabe
Englisch
Water Pollution & Control , Mineral Industries , Geology & Geophysics , Acid mine drainage , Mines and mineral resources , Geology , Rocks , Sandstones , Sulfides , Limestones , Environmental impacts , Hydrology , Pyrites , Leaching , Surface water , Ground water , Water quality , Hazards , Contamination , Metals , Weathering , Remedial action , Pennsylvania , Skytop(Pennsylvania) , Centre County(Pennsylvania)
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