En el caso de los metales preciosos (oro, plata, platino y similares), el mercado es distinto y su precio solo se compone por la oferta y demanda de los bancos centrales (europeos, americanos y asiáticos), además de las ...

Seasonal concentrations of total, particulate and dissolved Al, Cu, Cd. Cr, Fe, Pb and Ni were analyzed in surface water and total metals in sediment samples from black and whitewater rivers within the Itacoatiara City, ...

The sulphide-rich mine wastes accumulated in tailing dumps of La Concordia Mine (Puna of Argentina) have been exposed to the weathering action for more than 30 years. Since then, a series of redox reactions have triggered ...

The growth of agribusiness in Ecuador in recent years has caused serious problems of environmental contamination affecting its natural resources, so it is important to implement effective strategies to determine the sources ...

Industrial and domestic waste waters in Chile are discharged without previous treatment into rivers and other inland waters which are used to irrigate agricultural lands. The present study reports on results obtained when ...

Introduction: Acidic and metal(oid)-rich topsoils resulted after 34 years of continuous operations of a copper smelter in the Puchuncaví valley, central Chile. Currently, large-scale remediation actions for simultaneous ...