Pollution of soils by the toxic spill of a pyrite mine (Aznalcollar, Spain)

Interaction of gypsum with lead in aqueous solutions

“…As a result, the worldwide anthropogenic inputs of Pb to freshwaters and the atmosphere are in the range of several thou sand of tonnesja that gradually accumulate in the geo-and bio sphere (Nriagu and Pacyna, 1988). Even so, the most catastrophic effects of Pb emission arise when its release to the environment oc curs inevitably in areas close to tailings and waste water from mines (Sim6n et al, 1999). sparingly soluble Pb-bearing solid phase, presumably PbS04 (anglesite) in this case.…”

Arsenic Contamination in Soils Affected by a Pyrite-mine Spill (Aznalcóllar, SW Spain)

“…It can be seen that the arsenic content in water decreased from the mine to the lower part of the basin (where the water stopped), whereas the arsenic content in tailings increased from the Mine to Pilas-Aznalcázar (middle part of the spill), and from there it decreased up to the limit where the tailing reached. The fact that some elements (Sn, Bi) were no found in the contaminated water, indicated the amount of tailings that penetrated the soil, Simón et al (1999) estimated that around 95% of the arsenic concentration came from the direct input of tailings into the soil, while only 5% was due to the infiltration of polluted waters. In any case, the pollution was very heterogeneous, with values in affected soils similar to those of unaffected ones (close to 600 mg kg −1 ).…”

“…In any case, the pollution was very heterogeneous, with values in affected soils similar to those of unaffected ones (close to 600 mg kg −1 ). This unevenness was owed in Max Maximum, Min minimum, SD standard deviation part to soil properties, mainly structure, which affected the penetration of the tailings in the soil (Simón et al, 1999).…”

“…The toxic tailings spread approximately 40 km downstream, reaching the wetlands of the Doñana National Park (proclaimed world heritage by UNESCO in 1994). The total affected area was roughly 55 km 2 ; 2.9 km 2 were river courses, 12.3 km 2 eucalyptus forestation, 11.9 km 2 cereals and olive trees, 9.9 km 2 pastures, 5.4 km 2 rice fields, 4.9 km 2 marsh areas, 3.0 km 2 orchards, 2.2 km 2 cotton fields, 0.8 km 2 riverbank vegetation, 0.8 km 2 gravel beds, 0.5 km 2 meadows, and 0.4 km 2 vegetable crops (Aguilar, Dorronsoro, Galán, & Gómez, 1999;Simón et al, 1999).…”

Studies on Characterization of Soil Pollution and Variations of Heavy Metal Contents after Water-Tailings Reaction from Yonghwa Mine

“…폐광석과 광미에 포함된 황철석 과 관련된 연구에서는 시간이 지남에 따라 황철석의 풍화 에 의해 주변 토양과 하상퇴적물을 오염시킨다 (Fernández-Caliani et al, 2009;Fernández-Caliani and BarbaBrioso, 2010;Galan et al, 2008;Aguilar et al, 2004). 또한, 폐광산 주변수생생물들에 Pb, Zn이 다량 축 적된 것으로 보고하고 있다 (Mohammad et al, 2010;Zhou et al, 2007;Simón et al, 1999). 참 고 문 헌…”