Acid Mine Drainage - effects, types, plants, marine, oxygen

Acid Rock Drainage and Acid Mine Drainage Acid rock drainage (ARD) is a natural process in which sulfuric acid is produced when sulfides in rocks—for example, pyrite (FeS 2 )—are exposed to air and water.This occurs along outcrops or scree slopes where sulfide-bearing rock is naturally weathered .

Coal-Mine-Drainage Projects in Pennsylvania - USGS Water ...

About half of the coal-mine discharges in Pennsylvania are acidic, with pH 5 (figure 3a; figure 3b).Generally, limestone or other calcareous strata that could neutralize acid are lacking or deficient at sites that produce acidic mine drainage (AMD).

How does mine drainage occur? -

Mine drainage is formed when pyrite, an iron sulfide, is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing mine drainage.

Acid Mine Drainage: Chemistry - COTF

Acid Mine Drainage: Chemistry Acid mine drainage impacts stream and river ecosystems through acidity, ferric ion (Fe 3+) precipitation, oxygen depletion, and release of heavy metals associated with coal and metal mining, such as aluminum (Al 3+), zinc (Zn 2+), and manganese (Mn 2+).

Acid Mine Drainage -

Acid mine drainage (AMD) from abandoned coal mines affects the quality of both groundwater and surface water. Drainage results from various mining methods performed in the watershed. These methods include underground mining, strip mining, and auger mining.

Ohio Acid Mine Drainage Abatement Program

Ohio's inventory of abandoned mine land problems includes 1,300 miles of streams impacted by acid mine drainage. AMD is acidic water laden with heavy metals such as iron, aluminum and others as well as sulfates that originate through the oxidation of geologic strata containing sulfide minerals.

Acid Mine Drainage Problem

Acid Mine Drainage Problem. Western Pennsylvania was once a great coal mining region. The remnants of this industry are still with us in the form of abandoned mines that underlay a great portion of the land on which we live, and in the drainage of acidic …

Acidophiles in acid mine drainage - Wikipedia

Acid mine drainage may occur in the mine itself, the spoil heap (particularly colliery spoils from coal mining), or through some other activity that exposes metal sulfides at a high concentration, such as at major construction sites.

Acid Mine Drainage in Johannesburg | Greenpeace Africa

Acid mine drainage (AMD) is the flow of polluted water from old mining areas. Depending on the area, the water may contain high levels of salts, sulphate, iron, aluminium, toxic heavy metals such as cadmium and cobalt, and radioactive elements.

USGS Open-File Report 00-369

Acid mine drainage sometimes forms when minerals are exposed during mining. These minerals weather and release the contents into nearby creeks which sometimes causes them to …

Acid mine drainage | Mining Truth

Acid mine drainage can be discharged from a variety of places in the operation of the mine – any place where the ore comes in contact with air and water – such as the open pit walls, the wasterock piles, tailings, and underground tunnels.

Acid Mine Drainage -

Acid Mine Drainage (AMD) is generated when sulphide bearing minerals, often in the form of pyrite (which is iron-sulphide or FeS2 found inter alia in reefs mined for gold), are exposed to oxygen and water.

Acid mine drainage - microbewiki

Acid mine drainage (AMD) occurs when metal sulfides, most commonly pyrite, are exposed to and react with air and water. When water flows over or through sulfur-bearing mine tailings, a chemical reaction occurs between the water and rocks resulting in metal-rich water.

Acid mine drainage – Earth Life

Acid mine drainage. is the flow, or seepage, of polluted water from old mining areas. Depending on the area, the water may contain toxic heavy metals and radioactive particles.

CR Scientific: Some Chemistry of Acid Mine Drainage

Introduction The mining of coal deposits and metal ores often results in a phenomenon called "acid mine drainage" (AMD). This results primarily from the oxidative breakdown of transition metal sulfides, especially pyrite (FeS 2).There is actually a complex series of reactions and side reactions, but the net equation is often written according to Equation 1:

Contaminants | Acid mine drainage

Additionally, acid mine drainage coats stream bottoms with iron hydroxide, giving the subtrates in impacted streams an orange color. Because acid mine drainage can destroy a stream's aquatic community for miles, many of the old mining sites are being reclaimed.

EPA - What is Acid Mine Drainage

Acid Mine Drainage (AMD) is currently the main pollutant of surface water in the mid-Atlantic region. AMD is caused when water flows over or through sulfur-bearing materials forming solutions of net acidity.

APES chapter 16 Flashcards | Quizlet

acid mine drainage pollution caused when sulfuric acid and dangerous dissolved materials such as lead, arsenic and cadmium wash from mines into nearby lakes and streams derelict lands

How can acid mine drainage be treated?

Treatment of AMD: Acid mine drainage sometimes forms when certain minerals in the soil and rocks around mines are exposed to weathering processes during mining.These exposed minerals release their contents into creeks causing them to become acidic. This kind of pollution damages aquatic life and makes the water useless or harmful for others who depend on it for recreation or drinking water.

Acid Mine Drainage (AMD): causes, treatment and case ...

This paper describes Acid Mine Drainage (AMD) generation and its associated technical issues. As AMD is recognized as one of the more serious environmental problems in the mining industry, its causes, prediction and treatment have become the focus of a number of research initiatives commissioned by governments, the mining industry, universities and research establishments, with additional ...

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.

An Explanation of Acid Mine Drainage - ThoughtCo

In a nutshell, acid mine drainage is a form of water pollution that happens when rain, runoff, or streams come in contact with rock that is rich in sulfur. As a result, the water becomes very acidic and damages downstream aquatic ecosystems. In some regions it is the most common form of stream and ...

Acid Mine Drainage | Extension Service | West ia ...

Acid Mine Drainage is a problem worldwide where mining and other earth excavations expose sulfur minerals to the environment. The sulfide minerals react with air and water to form sulfuric acid and dissolved metals.

Acid Mine Drainage - Ground Truth Trekking

Of note for future mine development, 90% of the mines that predicted "low" acid mine drainage potential had acid mine drainage problems at the time of the study. In Alaska Acid mine drainage is a problem at a number of active Alaskan metal mines including Red Dog, Greens Creek, and Kensington Mine .


more FACT SHEET ACID MINE DRAINAGE The Problem The formation of acid mine drainage and the contaminants associated with it have been described as the largest environmental problem facing the U.S. mining industry.1 Acid mine drainage occurs when …

What can be done to prevent or clean up acid mine drainage ...

Water flowing through active or abandoned mine sites can become polluted by the material being mined[1]. By far the most common mine drainage problem is that of acid mine drainage (AMD). Sulfuric acid is produced when water interacts with sulfur-bearing materials in the presence of oxygen and common bacteria[1].

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 ...