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Mine water is normally considered as waste that has to be managed. However, new applications are increasingly being sought for the water that floods mining voids, especially in relation to its use as an energy resource. The worldwide energy market, within the current transition framework, is searching for creative approaches to produce and store clean energy. In particular, underground pumped hydroelectric energy storage systems (UPHS) constitute efficient and flexible alternatives to deal with intermittent renewable energy sources. In this work, a UPHS is designed using the mine water and the voids of a closed coal mine in Asturias (North-west Spain) as a lower reservoir. Moreover, this system is combined with a wind energy generation facility and the efficiency of the hybrid system is evaluated. With an investment cost of EUR 193 M, a 40 MW UPHES joined to a 60 MW wind farm would generate benefits of about EUR 54 M in 40 years. The reduction in CO2 emissions (29,000 equivalent tons per year) and the social benefits in a traditional mining area are other intangible advantages of this system.
Héctor Álvarez; Guillermo Domínguez; Almudena Ordóñez; Javier Menéndez; Rodrigo Álvarez; Jorge Loredo. Mine Water for the Generation and Storage of Renewable Energy: A Hybrid Hydro–Wind System. International Journal of Environmental Research and Public Health 2021, 18, 6758 .
AMA StyleHéctor Álvarez, Guillermo Domínguez, Almudena Ordóñez, Javier Menéndez, Rodrigo Álvarez, Jorge Loredo. Mine Water for the Generation and Storage of Renewable Energy: A Hybrid Hydro–Wind System. International Journal of Environmental Research and Public Health. 2021; 18 (13):6758.
Chicago/Turabian StyleHéctor Álvarez; Guillermo Domínguez; Almudena Ordóñez; Javier Menéndez; Rodrigo Álvarez; Jorge Loredo. 2021. "Mine Water for the Generation and Storage of Renewable Energy: A Hybrid Hydro–Wind System." International Journal of Environmental Research and Public Health 18, no. 13: 6758.
Soil samples from three inactive mines, corresponding to different Arsenic-bearing mineralization types, were collected and studied. The aim was to determine the influence of mine wastes mineralogy/geochemistry and texture in As mobility and to compare results from sequential chemical extraction and microscopic techniques (optical and electron) at a grain scale. Arsenic in soils is found mainly associated to the residual fraction, indicating that mechanical As dispersion is mainly responsible for As soil pollution. The use of objective microscopic techniques (i.e., Scanning Electron Microscopy-Energy Dispersive Spectroscopy -SEM-EDS-, High Resolution Transmission Electron Microscopy -HR-TEM) has pointed out that the selected sequential extraction method overestimates the role of Mn amorphous oxy-hydroxides and organic matter in As retention while underestimating the mechanism of As adsorption onto clay particle surfaces.
Jessica Álvarez-Quintana; Rodrigo Álvarez; Almudena Ordóñez. Arsenic in Soils Affected by Mining: Microscopic Studies vs. Sequential Chemical Extraction. International Journal of Environmental Research and Public Health 2020, 17, 8426 .
AMA StyleJessica Álvarez-Quintana, Rodrigo Álvarez, Almudena Ordóñez. Arsenic in Soils Affected by Mining: Microscopic Studies vs. Sequential Chemical Extraction. International Journal of Environmental Research and Public Health. 2020; 17 (22):8426.
Chicago/Turabian StyleJessica Álvarez-Quintana; Rodrigo Álvarez; Almudena Ordóñez. 2020. "Arsenic in Soils Affected by Mining: Microscopic Studies vs. Sequential Chemical Extraction." International Journal of Environmental Research and Public Health 17, no. 22: 8426.
This work focuses on the analysis of the electrokinetic decontamination of soils with high contents in As. Based on the data obtained from the laboratory on different materials in previous works. It has been sought to combine these with current laboratory and field work to infer the environmental and technical implementation implications of the As mobility in sediments and soils.
Antonio Luis Marqués Sierra; Cienfuegos P.; Álvarez R.; Ordoñez A.; Roqueñí N.; Loredo J.. Induced Mobilization of as Contained in Metallurgical Waste Using Electrokinetic Remediation Technology: Environmental Implications and Technical Limitations in soil Remediation of Orphan Mining Areas. Proceedings 2018, 2, 1412 .
AMA StyleAntonio Luis Marqués Sierra, Cienfuegos P., Álvarez R., Ordoñez A., Roqueñí N., Loredo J.. Induced Mobilization of as Contained in Metallurgical Waste Using Electrokinetic Remediation Technology: Environmental Implications and Technical Limitations in soil Remediation of Orphan Mining Areas. Proceedings. 2018; 2 (23):1412.
Chicago/Turabian StyleAntonio Luis Marqués Sierra; Cienfuegos P.; Álvarez R.; Ordoñez A.; Roqueñí N.; Loredo J.. 2018. "Induced Mobilization of as Contained in Metallurgical Waste Using Electrokinetic Remediation Technology: Environmental Implications and Technical Limitations in soil Remediation of Orphan Mining Areas." Proceedings 2, no. 23: 1412.
Abandoned and flooded mines constitute underground reservoirs which must be managed. When pumping is stopped in a closed mine, the process of flooding should be anticipated in order to avoid environmentally undesirable or unexpected mine water discharges at the surface, particularly in populated areas. The Candín-Fondón mining reservoir in Asturias (NW Spain) has an estimated void volume of 8 million m(3) and some urban areas are susceptible to be flooded if the water is freely released from the lowest mine adit/pithead. A conceptual model of this reservoir was undertaken and the flooding process was numerically modelled in order to estimate the time that the flooding would take. Additionally, the maximum safe height for the filling of the reservoir is discussed.
R. Álvarez; A. Ordóñez; E. De Miguel; C. Loredo. Prediction of the flooding of a mining reservoir in NW Spain. Journal of Environmental Management 2016, 184, 219 -228.
AMA StyleR. Álvarez, A. Ordóñez, E. De Miguel, C. Loredo. Prediction of the flooding of a mining reservoir in NW Spain. Journal of Environmental Management. 2016; 184 ():219-228.
Chicago/Turabian StyleR. Álvarez; A. Ordóñez; E. De Miguel; C. Loredo. 2016. "Prediction of the flooding of a mining reservoir in NW Spain." Journal of Environmental Management 184, no. : 219-228.
15th Annual Conference of the International-Association-for-Mathematical-Geosciences (IAMG). (SEP 02-06, 2013, Madrid, SPAIN
Clara Andrés Arias; María Almudena Ordóñez Alonso; Rodrigo Álvarez García. Hydrogeological and Thermal Modelling of an Underground Mining Reservoir. Lecture Notes in Earth System Sciences 2013, 419 -423.
AMA StyleClara Andrés Arias, María Almudena Ordóñez Alonso, Rodrigo Álvarez García. Hydrogeological and Thermal Modelling of an Underground Mining Reservoir. Lecture Notes in Earth System Sciences. 2013; ():419-423.
Chicago/Turabian StyleClara Andrés Arias; María Almudena Ordóñez Alonso; Rodrigo Álvarez García. 2013. "Hydrogeological and Thermal Modelling of an Underground Mining Reservoir." Lecture Notes in Earth System Sciences , no. : 419-423.
Experimental studies on the retention of metals (Cu, Co, Ni, and Zn) in bentonite samples from the Grau Region (Northern Peru) have been accomplished using monometallic, bimetallic, trimetallic, and tetrametallic solutions. Parameters such as pH and concentration of dissolved metals and organic compounds have been evaluated by means of batch adsorption experiments. Adsorption rates indicate the suitability of these bentonites in the environmental industry for heavy metals retention purposes. In addition to its quality as physical barrier to avoid the dispersion through the environment of polluted leachates, bentonite, due to its high cation exchange capacity, can act also as a chemical barrier, protecting the quality of surface and groundwater systems, while limiting the migration of heavy metals in solid residues or sludge stocked in security landfills. Adsorption rates of tested bentonites were proved to decrease when concentrations of both metal and organic compounds, as well as the number of ionic species, increase in solution; additionally, lower metal removal rates from solution were obtained when extremely acidic conditions were achieved.
J. Ayala; J. L. Vega; R. Álvarez; J. Loredo. Retention of heavy metal ions in bentonites from Grau Region (Northern Peru). Environmental Earth Sciences 2007, 53, 1323 -1330.
AMA StyleJ. Ayala, J. L. Vega, R. Álvarez, J. Loredo. Retention of heavy metal ions in bentonites from Grau Region (Northern Peru). Environmental Earth Sciences. 2007; 53 (6):1323-1330.
Chicago/Turabian StyleJ. Ayala; J. L. Vega; R. Álvarez; J. Loredo. 2007. "Retention of heavy metal ions in bentonites from Grau Region (Northern Peru)." Environmental Earth Sciences 53, no. 6: 1323-1330.