acid mine drainage
acid and metalliferous drainage , AMD (Abkürzung)
acid rock drainage , ARD (Abkürzung)

Acid mine drainage is of great concern in some areas.

But the best solution for acid mine drainage may be the simplest.

There has been very little remediation of acid mine drainage.

However this is the only source of acid mine drainage in the watershed.

Many of these tributaries are affected by acid mine drainage.

Discharges between 40-100 million gallons of acid mine drainage per day.

Monday Creek has been badly affected by acid mine drainage.

They would be suitable for relatively small flows or less complex acid mine drainage.

It's going to be a major pollution source forever because of the acid mine drainage."

Well, except maybe in cases of acid mine drainage."

Environmental issues with mining include acid mine drainage and large scale modifications to landscapes.

Landslides and acid mine drainage are two principal hazards of the area.

Thus, copper mines are often major culprits of acid mine drainage.

Acid mine drainage is the result of the excess coal mining that occurs.

Consequences can be environmentally harmful, as discussed in the entry for acid mine drainage.

They currently oversee the development and management of over 16 major acid mine drainage reclamation projects.

"It's the goo that precipitates out of the acid mine drainage."

Among their fears was the potential for acid mine drainage that results from sulfides mixing with air or water.

Acid mine drainage has occurred at the mine site.

In addition, we retained strict standards to address cyanide and to protect areas from acid mine drainage.

Acid mine drainage from coal mining is a serious problem in New Zealand.

The fishing quality in the areas down stream of the dam has been damaged by pollution from acid mine drainage.

Abandoned mines contribute toxic acid mine drainage to some tributaries of the river.

Cation exchange processes have previously been investigated as a potential treatment for acid mine drainage.

Acid mine drainage from the mines leads to severe environmental problems due to the heavy metal concentrations in the river.

When exposed to aerobic surficial conditions, or as a result of processing, minerals may breakdown releasing elements from their mineralogical bindings which may not be easily absorbed by unaccustomed ecosystems without impact (this process is sometimes known as Acid and Metalliferous Drainage).

This introduction of water is the initial step in most acid rock drainage situations.

Tailings piles or ponds may also be a source of acid rock drainage.

The piles also create acid rock drainage, which pollutes streams and rivers.

An environmental acid rock drainage (ARD) baseline report was submitted in 1999.

Total liability from acid rock drainage is estimated to be between $2 billion and $5 billion CAD.

However, other areas where the earth has been disturbed (e.g. construction sites, subdivisions, transportation corridors, etc.) may also contribute acid rock drainage to the environment.

They managed to convince the powers that be that acid rock drainage would devastate the river systems - as well as the fisheries downstream.

Acid rock drainage has recently been a hindrance to the completion of the construction of Interstate 99 near State College, Pennsylvania.

Sulfate released from decomposing pyrite combines with water, producing sulfuric acid, leading to acid rock drainage and potentially acid rain.

Exposures from cut and fill road construction in Virginia and Pennsylvania have resulted in localized acid rock drainage due to oxidation of the pyrite inclusions.

Exposed surfaces of rock in ore piles, waste rock piles, and forming pit walls generate acid rock drainage in groundwater, seeps, and surface water.

The resulting water can be highly acidic and is called acid mine drainage (AMD) or acid rock drainage (ARD).

It is from these and similar experiences that the term acid rock drainage has emerged as being preferable to acid mine drainage, thereby emphasizing the general nature of the problem.

The Marcellus has also been used locally for shale aggregate and common fill, although the pyritic shales are not suitable for this purpose because of acid rock drainage and volumetric expansion.

Natural decomposition of the shale into smaller fragments can affect slope stability, necessitating shallower slopes that require more material be disturbed in cut and fill work, exacerbating the acid rock drainage problem.

Some examples of past projects in biotechnology include a biologically assisted in situ mining program, biodegradation methods, passive bioremediation of acid rock drainage, and bioleaching of ores and concentrates.

However this acid rock drainage didn't come from a mine, rather it was produced by oxidation of pyrite rich rock which was unearthed during a road cut and then used as filler material in the I-99 construction.

Smithson designed the collected pool of water at the bottom as the most striking color element in the pit because it would be bright yellow due to the toxic runoff, or acid rock drainage (also known as yellow boy).

In many localities the liquid that drains from coal stocks, coal handling facilities, coal washeries, and even coal waste tips can be highly acidic, and in such cases it is treated as acid rock drainage.

For a mine nearing closure, the closure plan takes the form of a decommissioning plan, and includes details and selection of mitigative technologies (especially for acid rock drainage) and other specific reclamation and closure activities.

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 rocks containing an abundance of sulfide minerals.

Even though mining had stopped in 1974, runoff and rainwater that flow through the mine's abandoned tunnels combine with oxygen and the high sulfide content of the waste rock to create a condition called acid rock drainage (ARD).

This acid rock drainage ARD, with a low pH, and high concentrations of dissolved sulfate and metals, flows into the surrounding watershed and has adverse effects on water quality through deposition of metal-rich precipitates, which cascade through the ecosystem affecting algae, insect, and fish.

One of the oldest and most famous uranium mines in the world, the Rum Jungle Mine in Northern Australia was constructed in the 1950s, and is today experiencing extreme amounts of environmental degradation and acid rock drainage that are leading to further negative impacts on the surrounding river and ecosystems (Ferguson et al 2011).