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This work presents a case study using electrical resistivity tomography at a site mainly affected by the presence of residual lindane coming from a close landfill constructed by an old pesticide manufacturer. In addition, the landfill also collected chlorinated contaminants derived from the same industry. Lindane itself is a highly toxic contaminant that in small concentrations constitutes a high risk to health, which together with the other compounds, makes it a site with very hazardous characteristics. The geological distribution, formed by a complex detrital deposited over a marls substrate, is known from the existing network of monitoring wells. A geophysical prospecting survey consisting of seven electrical tomography profiles was carried out in the site. The lateral and vertical geometry of the contaminant plume was established, and the preferential flow directions were inferred by means of the resistivity sections obtained. Combining this information with analytical data from water samples, an empirical relationship between the conductivity value and the dissolved chloride content was developed, and the distribution of the concentration of chlorinated contaminants in the surface aquifer by isochloride sections was obtained. The results obtained are a very useful tool as a preliminary stage to remediation trials.
Bárbara Biosca; Lucía Arévalo-Lomas; Miguel Izquierdo-Díaz; Jesús Díaz-Curiel. Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography. Journal of Applied Geophysics 2021, 191, 104358 .
AMA StyleBárbara Biosca, Lucía Arévalo-Lomas, Miguel Izquierdo-Díaz, Jesús Díaz-Curiel. Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography. Journal of Applied Geophysics. 2021; 191 ():104358.
Chicago/Turabian StyleBárbara Biosca; Lucía Arévalo-Lomas; Miguel Izquierdo-Díaz; Jesús Díaz-Curiel. 2021. "Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography." Journal of Applied Geophysics 191, no. : 104358.
An openly accessible cellular automaton has been developed to predict the preferential migration pathways of contaminants by surface runoff in abandoned mining areas. The site where the validation of the results of the Contaminant Mass Transfer Cellular Automaton (CMTCA) has been carried out is situated on the steep flank of a valley in the Spanish northwestern region of Asturias, at the foot of which there is a village with 400 inhabitants, bordered by a stream that flows into a larger river just outside the village. Soil samples were collected from the steep valley flank where the mine adits and spoil heaps are situated, at the foot of the valley, and in the village, including private orchards. Water and sediment samples were also collected from both surface water courses. The concentration of 12 elements, including those associated with the Cu-Co-Ni ore, were analyzed by ICP-OES (Perkin Elmer Optima 3300DV, Waltham, MA, USA) and ICP-MS (Perkin Elmer NexION 2000, Waltham, MA, USA). The spatial representation of the model’s results revealed that those areas most likely to be crossed by soil material coming from source zones according to the CMTCA exhibited higher pollution indexes than the rest. The model also predicted where the probabilities of soil mass transfer into the stream were highest. The accuracy of this prediction was corroborated by the results of trace element concentrations in stream sediments, which, for elements associated with the mineral paragenesis (i.e., Cu, Co, Ni, and also As), increased between five- and nine-fold downstream from the predicted main transfer point. Lastly, the river into which the stream discharges is also affected by the mobilization of mined materials, as evidenced by an increase of up to 700% (in the case of Cu), between dissolved concentrations of those same elements upstream and downstream of the confluence of the river and the stream.
Fernando Barrio-Parra; Miguel Izquierdo-Díaz; Luis Jesús Fernández-Gutiérrez Del Álamo; Bárbara Biosca; Eduardo De Miguel. Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas. International Journal of Environmental Research and Public Health 2020, 17, 5117 .
AMA StyleFernando Barrio-Parra, Miguel Izquierdo-Díaz, Luis Jesús Fernández-Gutiérrez Del Álamo, Bárbara Biosca, Eduardo De Miguel. Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas. International Journal of Environmental Research and Public Health. 2020; 17 (14):5117.
Chicago/Turabian StyleFernando Barrio-Parra; Miguel Izquierdo-Díaz; Luis Jesús Fernández-Gutiérrez Del Álamo; Bárbara Biosca; Eduardo De Miguel. 2020. "Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas." International Journal of Environmental Research and Public Health 17, no. 14: 5117.
A blind field test with 136 independent measurements of radon (222Rn) in soil air retrieved from a depth of 0.8 m in a decommissioned lindane (γ-hexachlorocyclohexane) production plant was undertaken to evaluate the performance of the 222Rn-deficit technique as a screening methodology for the location and delineation of subsurface accumulations of complex mixtures of organic contaminants. Maps of 222Rn iso-concentrations were drawn and interpreted before direct analytical information regarding concentrations of hexachlorocyclohexanes, chlorobenzenes and BTEX compounds in soil, groundwater and soil air were disclosed to the authors. The location and extension of pollution hot spots inferred from the 222Rn campaigns agrees remarkably well with the analytical data obtained from the intrusive sampling campaigns and with the location of contaminant source zones (chemical reactor and waste-storage area) and geological sinks of those contaminants (paleochannel). Two main limitations to the applicability of the 222Rn-deficit technique were identified and assessed: The statistically significant variation of 222Rn concentrations with diurnal changes of ground-level air temperature and the maximum depth of investigation in the absence of significant advective and co-advective transport of radon. If the influence of those two factors is accounted for and/or minimized (by averaging replicated measurements during the workday and in different days), the 222Rn-deficit technique has the potential to be an efficient technique which delivers information in quasi-real time, with a much higher spatial density than that of intrusive techniques, at a much faster rate and at a significantly lower cost. The 222Rn-deficit technique is an effective tool for real-time site characterization only limited by diffusion length of radon and diurnal temperature variations.
Eduardo De Miguel; F. Barrio-Parra; Miguel Izquierdo Díaz; J. Fernández; J.E. García-González; R. Álvarez. Applicability and limitations of the radon-deficit technique for the preliminary assessment of sites contaminated with complex mixtures of organic chemicals: A blind field-test. Environment International 2020, 138, 105591 .
AMA StyleEduardo De Miguel, F. Barrio-Parra, Miguel Izquierdo Díaz, J. Fernández, J.E. García-González, R. Álvarez. Applicability and limitations of the radon-deficit technique for the preliminary assessment of sites contaminated with complex mixtures of organic chemicals: A blind field-test. Environment International. 2020; 138 ():105591.
Chicago/Turabian StyleEduardo De Miguel; F. Barrio-Parra; Miguel Izquierdo Díaz; J. Fernández; J.E. García-González; R. Álvarez. 2020. "Applicability and limitations of the radon-deficit technique for the preliminary assessment of sites contaminated with complex mixtures of organic chemicals: A blind field-test." Environment International 138, no. : 105591.
This study evaluates the results of the characterization of air pollution in urban green areas using edible plants. To this purpose, we examined the effect of location (i.e., three different levels of pollution), substrate (peat moss and vermiculite), and plant species (oilseed rape [ L.] and kale [ L.]) on the accumulation of trace elements on leaves. A total of 36 samples of unwashed leaves were digested with HNO-HO and analyzed for 27 elements by inductively coupled plasma mass spectrometry. Considering the location, plants exposed next to the road showed higher contents of traffic-related elements, and additionally, outdoors samples were enriched in marine aerosol ions. Cadmium and Pb concentrations did not exceed the European legal maximum levels for vegetables, so their consumption would be safe for human health. Results support the hypothesis that edible plants such as kale and rapeseed could be used as bioindicators of atmospheric pollution.
Miguel Izquierdo Díaz; Peter E. Holm; Fernando Barrio-Parra; Eduardo De Miguel; Jonas Duus Stevens Lekfeldt; Jakob Magid. Urban Allotment Gardens for the Biomonitoring of Atmospheric Trace Element Pollution. Journal of Environmental Quality 2019, 48, 518 -525.
AMA StyleMiguel Izquierdo Díaz, Peter E. Holm, Fernando Barrio-Parra, Eduardo De Miguel, Jonas Duus Stevens Lekfeldt, Jakob Magid. Urban Allotment Gardens for the Biomonitoring of Atmospheric Trace Element Pollution. Journal of Environmental Quality. 2019; 48 (2):518-525.
Chicago/Turabian StyleMiguel Izquierdo Díaz; Peter E. Holm; Fernando Barrio-Parra; Eduardo De Miguel; Jonas Duus Stevens Lekfeldt; Jakob Magid. 2019. "Urban Allotment Gardens for the Biomonitoring of Atmospheric Trace Element Pollution." Journal of Environmental Quality 48, no. 2: 518-525.
Despite the environmental, economic and social benefits of urban gardening, there are also potential threats to human health due to the possible enrichment of urban soils in anthropic contaminants. As of today, our knowledge about the influence of population characteristics and local habits of garden use on risk estimates is incomplete. This work studies the effect of the variability of local exposure factors on the output of a risk assessment in an urban garden scenario through a probabilistic risk assessment (PRA) and an uncertainty analysis. A total of 24 soil samples and 23 samples of lettuce were collected in six urban gardens. Trace element concentration were analysed in both matrices with an atomic absorption spectrometer. Relevant exposure factors were characterized by onsite and online surveys. The results showed that the use of widely accepted, default exposure values overestimate the risk when compared with the result of an assessment with local information. In this study, the 95th percentile of the risk distribution did not exceed human health unacceptability thresholds. Exposure frequency and vegetable consumption rates were the variables to which the risk outcome was most sensitive. This study highlights the importance of characterizing urban gardeners’ local activity patterns when assessing the acceptability of urban agriculture in terms of human health.
F. Barrio-Parra; Miguel Izquierdo Díaz; A. Dominguez-Castillo; R. Medina; E. De Miguel. Human-health probabilistic risk assessment: the role of exposure factors in an urban garden scenario. Landscape and Urban Planning 2019, 185, 191 -199.
AMA StyleF. Barrio-Parra, Miguel Izquierdo Díaz, A. Dominguez-Castillo, R. Medina, E. De Miguel. Human-health probabilistic risk assessment: the role of exposure factors in an urban garden scenario. Landscape and Urban Planning. 2019; 185 ():191-199.
Chicago/Turabian StyleF. Barrio-Parra; Miguel Izquierdo Díaz; A. Dominguez-Castillo; R. Medina; E. De Miguel. 2019. "Human-health probabilistic risk assessment: the role of exposure factors in an urban garden scenario." Landscape and Urban Planning 185, no. : 191-199.
David Bolonio Martín; Miguel Izquierdo Díaz; Ignacio Laorga Fernández; Ljiljana Medic Pejic; Chrisitan Peña Narciso. RAWMATCARDS : Critical Raw Materials Cards Game. RAWMATCARDS : Critical Raw Materials Cards Game 2019, 1 .
AMA StyleDavid Bolonio Martín, Miguel Izquierdo Díaz, Ignacio Laorga Fernández, Ljiljana Medic Pejic, Chrisitan Peña Narciso. RAWMATCARDS : Critical Raw Materials Cards Game. RAWMATCARDS : Critical Raw Materials Cards Game. 2019; ():1.
Chicago/Turabian StyleDavid Bolonio Martín; Miguel Izquierdo Díaz; Ignacio Laorga Fernández; Ljiljana Medic Pejic; Chrisitan Peña Narciso. 2019. "RAWMATCARDS : Critical Raw Materials Cards Game." RAWMATCARDS : Critical Raw Materials Cards Game , no. : 1.
Luis Fernández-Gutiérrezdelalamo; David Bolonio; Miguel Izquierdo Díaz; Fernando Barrio-Parra; Luis Felipe Mazadiego; Ángel Fidalgo-Blanco. The Use of Heterogeneity to Improve the Learning Process of Large Groups of Students. Proceedings of the Sixth International Conference on Technological Ecosystems for Enhancing Multiculturality 2018, 794 -798.
AMA StyleLuis Fernández-Gutiérrezdelalamo, David Bolonio, Miguel Izquierdo Díaz, Fernando Barrio-Parra, Luis Felipe Mazadiego, Ángel Fidalgo-Blanco. The Use of Heterogeneity to Improve the Learning Process of Large Groups of Students. Proceedings of the Sixth International Conference on Technological Ecosystems for Enhancing Multiculturality. 2018; ():794-798.
Chicago/Turabian StyleLuis Fernández-Gutiérrezdelalamo; David Bolonio; Miguel Izquierdo Díaz; Fernando Barrio-Parra; Luis Felipe Mazadiego; Ángel Fidalgo-Blanco. 2018. "The Use of Heterogeneity to Improve the Learning Process of Large Groups of Students." Proceedings of the Sixth International Conference on Technological Ecosystems for Enhancing Multiculturality , no. : 794-798.
This chapter discusses the analytical protocols that have been developed to assess the bioaccessibility of contaminants potentially able to impact human health. In order to evaluate a contaminant's bioaccessibility, the physiological conditions of the gastrointestinal tract or lung environment must be reproduced in the laboratory. Most research efforts in the bioaccessibility of trace elements have taken place in the context of urban environments. Urban soil is the most thoroughly studied solid matrix in urban environments as regards the bioaccessibility of trace elements in its composition. Harmonisation of gastrointestinal and lung bioaccessibility analytical protocols should be followed by unification of criteria for how their results are used and interpreted in human health risk assessments. Failure to consider this bioaccessibility in a risk assessment leads to numerical outcomes of risk that may overestimate the real value by more than one order of magnitude.
Eduardo De Miguel; Almudena Ordóñez; Fernando Barrio-Parra; Miguel Izquierdo Díaz; Rodrigo Álvarez; Juan Mingot; Susanne M. Charlesworth. Bioaccessibility of Trace Elements in Urban Environments. Urban Pollution 2018, 107 -118.
AMA StyleEduardo De Miguel, Almudena Ordóñez, Fernando Barrio-Parra, Miguel Izquierdo Díaz, Rodrigo Álvarez, Juan Mingot, Susanne M. Charlesworth. Bioaccessibility of Trace Elements in Urban Environments. Urban Pollution. 2018; ():107-118.
Chicago/Turabian StyleEduardo De Miguel; Almudena Ordóñez; Fernando Barrio-Parra; Miguel Izquierdo Díaz; Rodrigo Álvarez; Juan Mingot; Susanne M. Charlesworth. 2018. "Bioaccessibility of Trace Elements in Urban Environments." Urban Pollution , no. : 107-118.
The applicability of radon (222Rn) measurements to delineate non-aqueous phase liquids (NAPL) contamination in subsoil is discussed at a site with lithological discontinuities through a blind test. Three alpha spectroscopy monitors were used to measure radon in soil air in a 25,000-m2 area, following a regular sampling design with a 20-m2 grid. Repeatability and reproducibility of the results were assessed by means of duplicate measurements in six sampling positions. Furthermore, three points not affected by oil spills were sampled to estimate radon background concentration in soil air. Data histograms, Q-Q plots, variograms, and cluster analysis allowed to recognize two data populations, associated with the possible path of a fault and a lithological discontinuity. Even though the concentration of radon in soil air was dominated by this discontinuity, the characterization of the background emanation in each lithological unit allowed to distinguish areas potentially affected by NAPL, thus justifying the application of radon emanometry as a screening technique for the delineation of NAPL plumes in sites with lithological discontinuities.
Eduardo De Miguel; Fernando Barrio-Parra; Javier Elio; Miguel Izquierdo-Díaz; Jerónimo Emilio García-González; Luis Felipe Mazadiego; Rafael Medina. Applicability of radon emanometry in lithologically discontinuous sites contaminated by organic chemicals. Environmental Science and Pollution Research 2018, 25, 20255 -20263.
AMA StyleEduardo De Miguel, Fernando Barrio-Parra, Javier Elio, Miguel Izquierdo-Díaz, Jerónimo Emilio García-González, Luis Felipe Mazadiego, Rafael Medina. Applicability of radon emanometry in lithologically discontinuous sites contaminated by organic chemicals. Environmental Science and Pollution Research. 2018; 25 (20):20255-20263.
Chicago/Turabian StyleEduardo De Miguel; Fernando Barrio-Parra; Javier Elio; Miguel Izquierdo-Díaz; Jerónimo Emilio García-González; Luis Felipe Mazadiego; Rafael Medina. 2018. "Applicability of radon emanometry in lithologically discontinuous sites contaminated by organic chemicals." Environmental Science and Pollution Research 25, no. 20: 20255-20263.
S García-Alonso; R M Pérez-Pastor; V Archilla-Prat; J Rodríguez-Maroto; M Izquierdo-Díaz; E Rojas; D Sanz. Determination of selected polycyclic aromatic compounds in particulate matter: a validation study of an agitation extraction method for samples with low mass loadings using reduced volumes. IOP Conference Series: Earth and Environmental Science 2015, 28, 12008 .
AMA StyleS García-Alonso, R M Pérez-Pastor, V Archilla-Prat, J Rodríguez-Maroto, M Izquierdo-Díaz, E Rojas, D Sanz. Determination of selected polycyclic aromatic compounds in particulate matter: a validation study of an agitation extraction method for samples with low mass loadings using reduced volumes. IOP Conference Series: Earth and Environmental Science. 2015; 28 ():12008.
Chicago/Turabian StyleS García-Alonso; R M Pérez-Pastor; V Archilla-Prat; J Rodríguez-Maroto; M Izquierdo-Díaz; E Rojas; D Sanz. 2015. "Determination of selected polycyclic aromatic compounds in particulate matter: a validation study of an agitation extraction method for samples with low mass loadings using reduced volumes." IOP Conference Series: Earth and Environmental Science 28, no. : 12008.