Taxonomy term

acid mine drainage

Bringing geoscience to bear on the problem of abandoned mines

With 3 million gallons of acidic, heavy-metal-laden water behind an earthen plug at high elevation, Colorado’s Gold King Mine was, literally, a situation just waiting to go downhill. The blowout last August shone a spotlight on the larger problem of abandoned mine lands. What role do geoscientists play in solving it?

19 Jun 2016

Down to Earth With: Tom Malloy

Butte, Mont., is home to one of the nation’s largest Superfund sites — a 300-meter-deep lake of acidic, heavy metal-contaminated water known as the Berkeley Pit. As the reclamation manager of Butte-Silver Bow County, it’s Tom Malloy’s job to help clean it up.

27 Aug 2014

Mix of acid mine drainage and fracking fluid a recipe for remediation?

Mixing contaminated wastewater from hydraulic fracturing, also called hydrofracking or fracking, operations with acid mine drainage (AMD) may sound like an ecological disaster in the making. But according to the authors of a new study, such a toxic brew may actually be a recipe for remediation. And, if some hurdles are cleared, researchers say, it could relieve stress on precious freshwater resources by offering companies drilling for natural gas a cheaper alternative to those resources.

21 May 2014

All that glitters... Acid mine drainage: The toxic legacy of gold mining in South Africa

More than a century of mining near Johannesburg, South Africa, has left the region littered with mounds of waste and underlain by a network of abandoned mine shafts. Together, they are producing a toxic brew of acid mine drainage.

23 Sep 2011

Mining for iron oxides in coal mine sludge

The billions of tons of coal that miners extracted from Pennsylvania’s ground over the past two centuries have long gone up in smoke, but their legacy lives on in the state’s rivers and waterways. Nasty discharge — often with sky-high metal concentrations — from thousands of abandoned coal mines has been polluting Pennsylvania’s streams and groundwater.

30 Apr 2009