The mine tailing accident in Aznalcollar

Massive amounts of acidic waters and mud pH;3. containing toxic metals such as zinc, lead, arsenic, copper, antimony, cobalt, thallium, bismuth, cadmium, silver, mercury and selenium were released in the surroundings of Do˜nana Park as a consequence of the mine tailings spill accident in Aznalcollar SW Spain.. This introductory paper describes the main characteristics of Do˜nana Park, the mine activities developed in Aznalcollar and their related environmental risks. The tailing spill accident and the first package of urgent actions undertaken for preventive and mitigation purposes are also summarized.