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Book ; Online: Applied Geochemistry with Case Studies on Geological Formations, Exploration Techniques and Environmental Issues

Felipe Mazadiego, Luis / De Miguel Garcia, Eduardo / Barrio-Parra, Fernando / Izquierdo-Díaz, Miguel

2020

Keywords	Geological surface processes (geomorphology) ; Geochemistry
Size	1 electronic resource (140 pages)
Publisher	IntechOpen
Document type	Book ; Online
Note	English ; Open Access
HBZ-ID	HT021045092
ISBN	9781789859164 ; 1789859166
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Influence of advection on the soil gas radon deficit technique for the quantification of LNAPL

Cecconi, Alessandra / Verginelli, Iason / Barrio-Parra, Fernando / De Miguel, Eduardo / Baciocchi, Renato

Science of the Total Environment. 2023 June, v. 875 p.162619-

2023

Abstract: The Radon (Rn) deficit technique is a rapid, low-cost, and non-invasive method to identify and quantify light non-aqueous phase liquids (LNAPL) in the soil. LNAPL saturation is typically estimated from Rn deficit using Rn partition coefficients, assuming ...

Abstract	The Radon (Rn) deficit technique is a rapid, low-cost, and non-invasive method to identify and quantify light non-aqueous phase liquids (LNAPL) in the soil. LNAPL saturation is typically estimated from Rn deficit using Rn partition coefficients, assuming equilibrium conditions. This work examines the applicability of this method in the presence of local advective fluxes that can be generated by groundwater fluctuations or biodegradation processes in the source zone. To this end, a one-dimensional analytical model was developed to simulate the steady-state diffusive-advective transport of soil gas Rn in the presence of LNAPL. The analytical solution was first validated against an existing numerical model adapted to include advection. Then a series of simulations to study the effect of advection on Rn profiles were carried out. It was found that in high-permeability soils (such as sandy soils), advective phenomena can significantly affect Rn deficit curves in the subsurface compared with those expected, assuming either equilibrium conditions or a diffusion-dominated transport. Namely, in the presence of pressure gradients generated by groundwater fluctuations, applying the traditional Rn deficit technique (assuming equilibrium conditions) can lead to an underestimation of LNAPL saturation. Furthermore, in the presence of methanogenesis processes (e.g., in the case of a fresh LNAPL of petroleum hydrocarbons), local advective fluxes can be expected above the source zone. In such cases, Rn concentrations above the source zone can be higher than those above background areas without advective phenomena, resulting in Rn deficits higher than 1 (i.e., Rn excess), and thus leading to a wrong interpretation regarding the presence of LNAPL in the subsurface if advection is not considered. Overall, the results obtained suggest that advection should be considered in the presence of pressure gradients in the subsurface to ensure an effective application of the soil gas Rn-deficit technique for quantitative estimation of LNAPL saturation.
Keywords	advection ; biodegradation ; environment ; groundwater ; mathematical models ; methane production ; petroleum ; radon ; soil air ; Radon deficit technique ; LNAPL delineation ; Soil gas transport modeling ; Advective transport
Language	English
Dates of publication	2023-06
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.162619
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Influence of advection on the soil gas radon deficit technique for the quantification of LNAPL.

Cecconi, Alessandra / Verginelli, Iason / Barrio-Parra, Fernando / De Miguel, Eduardo / Baciocchi, Renato

The Science of the total environment

2023 Volume 875, Page(s) 162619

Abstract	The Radon (Rn) deficit technique is a rapid, low-cost, and non-invasive method to identify and quantify light non-aqueous phase liquids (LNAPL) in the soil. LNAPL saturation is typically estimated from Rn deficit using Rn partition coefficients, assuming equilibrium conditions. This work examines the applicability of this method in the presence of local advective fluxes that can be generated by groundwater fluctuations or biodegradation processes in the source zone. To this end, a one-dimensional analytical model was developed to simulate the steady-state diffusive-advective transport of soil gas Rn in the presence of LNAPL. The analytical solution was first validated against an existing numerical model adapted to include advection. Then a series of simulations to study the effect of advection on Rn profiles were carried out. It was found that in high-permeability soils (such as sandy soils), advective phenomena can significantly affect Rn deficit curves in the subsurface compared with those expected, assuming either equilibrium conditions or a diffusion-dominated transport. Namely, in the presence of pressure gradients generated by groundwater fluctuations, applying the traditional Rn deficit technique (assuming equilibrium conditions) can lead to an underestimation of LNAPL saturation. Furthermore, in the presence of methanogenesis processes (e.g., in the case of a fresh LNAPL of petroleum hydrocarbons), local advective fluxes can be expected above the source zone. In such cases, Rn concentrations above the source zone can be higher than those above background areas without advective phenomena, resulting in Rn deficits higher than 1 (i.e., Rn excess), and thus leading to a wrong interpretation regarding the presence of LNAPL in the subsurface if advection is not considered. Overall, the results obtained suggest that advection should be considered in the presence of pressure gradients in the subsurface to ensure an effective application of the soil gas Rn-deficit technique for quantitative estimation of LNAPL saturation.
Language	English
Publishing date	2023-03-04
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.162619
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Article ; Online: Assessment of lettuces grown in urban areas for human consumption and as bioindicators of atmospheric pollution.

Izquierdo-Díaz, Miguel / Hansen, Veronika / Barrio-Parra, Fernando / De Miguel, Eduardo / You, Yawen / Magid, Jakob

Ecotoxicology and environmental safety

2023 Volume 256, Page(s) 114883

Abstract: This study proposes using the network of urban gardens to grow vegetables and to monitor air quality, and it also evaluates whether food grown on a clean substrate in an urban environment is safe for consumption. For this purpose, lettuces were exposed ... ...

Abstract	This study proposes using the network of urban gardens to grow vegetables and to monitor air quality, and it also evaluates whether food grown on a clean substrate in an urban environment is safe for consumption. For this purpose, lettuces were exposed to different degrees of air pollution in five locations in the city of Copenhagen, plus a reference site. Six specimens were placed at each site and, after the exposure period, half of each sample was washed. Subsamples were then digested by a total extraction method and a bioaccessible extraction method, and the concentration of 23 elements subsequently measured by ICP-MS. The results showed that exposed samples in areas of higher atmospheric pollution accumulated a larger amount of trace elements associated with typical urban sources. They also highlighted the importance of washing food to remove particles that adhere to their surface. However, bioaccessibility testing demonstrated the importance of including bioaccessibility in risk analyses and how this factor varies depending on the type of matrix. In this case, bioaccessibility was higher for plant tissue than for particulate matter. Lastly, metal concentrations in lettuce were compared with legal values and an analysis of daily intake showed that the levels in Copenhagen were within limits for the protection of human health.
MeSH term(s)	Humans ; Lactuca ; Environmental Biomarkers ; Environmental Monitoring/methods ; Environmental Pollution/analysis ; Air Pollution/analysis ; Particulate Matter/analysis ; Air Pollutants/analysis
Chemical Substances	Environmental Biomarkers ; Particulate Matter ; Air Pollutants
Language	English
Publishing date	2023-04-10
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	436536-7
ISSN	1090-2414 ; 0147-6513
ISSN (online)	1090-2414
ISSN	0147-6513
DOI	10.1016/j.ecoenv.2023.114883
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Article: Application and limitations of time domain-induced polarization tomography for the detection of hydrocarbon pollutants in soils with electro-metallic components: a case study

Biosca, Bárbara / Arévalo-Lomas, Lucía / Barrio-Parra, Fernando / Díaz-Curiel, Jesús

Environmental monitoring and assessment. 2020 Feb., v. 192, no. 2

2020

Abstract: Nowadays, the growing concern about the environmental problems affecting the subsoil has focussed efforts on the detection and characterization of contaminated sites through geophysical prospecting methods. In the present study, a case of a contaminated ... ...

Abstract	Nowadays, the growing concern about the environmental problems affecting the subsoil has focussed efforts on the detection and characterization of contaminated sites through geophysical prospecting methods. In the present study, a case of a contaminated site by hydrocarbons and their study by means of time domain-induced polarization tomography is presented. The response in chargeability of porous media due to this kind of pollutant allows its delimitation using this method. However, one of the limitations for the application of this technique is the presence of lithologies that contain electro-metallic salts. These salts can produce anomalies of chargeability and mask those due to nonaqueous phase liquids. The studies were conducted in an area contaminated by fuel leaks from supply tanks within a train maintenance facility. Those leaks occurred while the tanks were in use, but since their dismantling, the leak stopped. The geology of the area presented strong heterogeneities and the access was limited by train tracks. In order to locate and characterize the contaminant plume, measurements of resistivity and chargeability were carried out. A grid of monitoring wells in this area was also available from which information about free-phase pollutants was obtained, and a new drilling was carried out to verify an unexpected anomaly. The results obtained show that the location of the plume by the geophysical techniques employed can lead to ambiguity, as an anomaly that does not correspond to contaminated areas appeared but to the presence of clays rich in electro-metallic components such as Mg, Fe, Mn and Al.
Keywords	aluminum ; case studies ; clay ; drilling ; geophysics ; hydrocarbons ; iron ; lithology ; magnesium ; manganese ; monitoring ; nonaqueous phase liquids ; porous media ; railroads ; salts ; soil pollution ; subsoil ; tanks ; tomography ; wells
Language	English
Dates of publication	2020-02
Size	p. 115.
Publishing place	Springer International Publishing
Document type	Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-020-8073-0
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Application and limitations of time domain-induced polarization tomography for the detection of hydrocarbon pollutants in soils with electro-metallic components: a case study.

Biosca, Bárbara / Arévalo-Lomas, Lucía / Barrio-Parra, Fernando / Díaz-Curiel, Jesús

Environmental monitoring and assessment

2020 Volume 192, Issue 2, Page(s) 115

Abstract	Nowadays, the growing concern about the environmental problems affecting the subsoil has focussed efforts on the detection and characterization of contaminated sites through geophysical prospecting methods. In the present study, a case of a contaminated site by hydrocarbons and their study by means of time domain-induced polarization tomography is presented. The response in chargeability of porous media due to this kind of pollutant allows its delimitation using this method. However, one of the limitations for the application of this technique is the presence of lithologies that contain electro-metallic salts. These salts can produce anomalies of chargeability and mask those due to nonaqueous phase liquids. The studies were conducted in an area contaminated by fuel leaks from supply tanks within a train maintenance facility. Those leaks occurred while the tanks were in use, but since their dismantling, the leak stopped. The geology of the area presented strong heterogeneities and the access was limited by train tracks. In order to locate and characterize the contaminant plume, measurements of resistivity and chargeability were carried out. A grid of monitoring wells in this area was also available from which information about free-phase pollutants was obtained, and a new drilling was carried out to verify an unexpected anomaly. The results obtained show that the location of the plume by the geophysical techniques employed can lead to ambiguity, as an anomaly that does not correspond to contaminated areas appeared but to the presence of clays rich in electro-metallic components such as Mg, Fe, Mn and Al.
MeSH term(s)	Environmental Monitoring/methods ; Geology ; Hydrocarbons/analysis ; Hydrocarbons/chemistry ; Metals ; Soil ; Soil Pollutants/analysis ; Soil Pollutants/chemistry ; Tomography
Chemical Substances	Hydrocarbons ; Metals ; Soil ; Soil Pollutants
Language	English
Publishing date	2020-01-15
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-020-8073-0
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Article ; Online: Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas.

Barrio-Parra, Fernando / Izquierdo-Díaz, Miguel / Fernández-Gutiérrez Del Álamo, Luis Jesús / Biosca, Bárbara / De Miguel, Eduardo

International journal of environmental research and public health

2020 Volume 17, Issue 14

Abstract: 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 ... ...

Abstract	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.
MeSH term(s)	Environmental Monitoring ; Geologic Sediments ; Mining ; Rivers ; Soil ; Trace Elements/analysis ; Water Pollutants, Chemical/analysis
Chemical Substances	Soil ; Trace Elements ; Water Pollutants, Chemical
Language	English
Publishing date	2020-07-15
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1660-4601
ISSN (online)	1660-4601
DOI	10.3390/ijerph17145117
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: A free cellular model of dune dynamics: Application to El Fangar spit dune system (Ebro Delta, Spain)

Barrio-Parra, Fernando / Inmaculada Rodríguez-Santalla

Computers & geosciences. 2014 Jan., v. 62

2014

Abstract: Currently, dune field surveying is employed to assess dune net volume changes and their accretion and erosion patterns. In dune fields with complex sediment sources and sink interactions such as El Fangar Spit (Ebro Delta, Spain), it is difficult to ... ...

Abstract	Currently, dune field surveying is employed to assess dune net volume changes and their accretion and erosion patterns. In dune fields with complex sediment sources and sink interactions such as El Fangar Spit (Ebro Delta, Spain), it is difficult to establish the sediment input and output with only net volume changes estimated by dune field surveying. This work presents a free dune dynamic cellular model that incorporates algorithms that introduce wind data into the erosion and transport processes. The model can be applied to dune systems with variable wind regime. A calibration methodology based on the morphological reproduction of the observed dune field evolution is proposed. The model and the calibration methodology is applied to a region of El Fangar dune system surveyed with DGPS on 15th and 18th April 2012. The difference between the final measured dune state and the best morphological reproduction obtained with the model is employed to estimate the sediment flux. This operation yields an output sand flux of 98.8m3 and an input of 292.6m3. This algorithm could have a great impact on the study of complex dune systems where the dunes act as sinks and sources of beach sediments and in the characterization of the beach–dune interactions.
Keywords	algorithms ; computers ; dunes ; models ; sand ; surveys ; wind ; Spain
Language	English
Dates of publication	2014-01
Size	p. 187-197.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0098-3004
DOI	10.1016/j.cageo.2013.07.017
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Risk assessment from exposure to arsenic, antimony, and selenium in urban gardens (Madrid, Spain)

De Miguel, Eduardo / Izquierdo, Miguel / Gómez Goicoetxea, Amaia / Mingot, Juan / Barrio‐Parra, Fernando

Environmental toxicology and chemistry. 2017 Feb., v. 36, no. 2 p.544-550

2017

Abstract: The authors discuss the geochemical behavior of arsenic (As), antimony (Sb), and selenium (Se) in urban gardens and the human health implications associated with urban agriculture. A total of 42 samples from 7 urban gardens in Madrid, Spain, were ... ...

Abstract	The authors discuss the geochemical behavior of arsenic (As), antimony (Sb), and selenium (Se) in urban gardens and the human health implications associated with urban agriculture. A total of 42 samples from 7 urban gardens in Madrid, Spain, were collected from the top 20 cm of soil. Concentrations of As, Sb, and Se and the main soil properties (i.e., total iron, pH, texture, calcium carbonate, and organic matter) were determined. A significant correlation was found between As and Sb and calcium carbonate, indicating the possibility of surface adsorption or ligand exchange with the carbonate group. Also, Sb seemed to form stable chelates with soil organic matter. On the other hand, Se showed a significant association with clay and iron content. The concentration of Sb in soil exceeded the recommended value for agricultural use in 70% of the urban gardens. A human health risk assessment resulted in acceptable levels of both noncarcinogenic and carcinogenic risks (although with elevated values of the latter), with As as the main risk driver and soil and food ingestion as the main exposure pathways. The numerical results of the risk assessment should be interpreted with caution given the considerable uncertainties in some exposure variables and the lack of quantitative values for the suspected carcinogenicity of Sb and Se. Environ Toxicol Chem 2017;36:544–550. © 2016 SETAC
Keywords	antimony ; geochemistry ; soil properties ; chelates ; clay ; selenium ; gardens ; ingestion ; risk ; texture ; uncertainty ; iron ; human health ; risk assessment ; urban agriculture ; carcinogenicity ; health effects assessments ; soil organic matter ; arsenic ; calcium carbonate ; adsorption ; ligands ; pH ; exposure pathways ; Spain ; organic matter
Language	English
Dates of publication	2017-02
Size	p. 544-550.
Publishing place	John Wiley & Sons, Ltd
Document type	Article ; Online
Note	JOURNAL ARTICLE ; 2019-12-06
ZDB-ID	46234-2
ISSN	1552-8618 ; 0730-7268
ISSN (online)	1552-8618
ISSN	0730-7268
DOI	10.1002/etc.3569
Database	NAL-Catalogue (AGRICOLA)

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Article: A Modeling Approach to Assess the Key Factors in the Evolution of Coastal Systems: the Ebro North Hemidelta Case

Barrio-Parra, Fernando / Inmaculada RodrÃguez-Santalla / Rui Taborda / MÃ³nica Ribeiro

Estuaries and coasts. 2017 May, v. 40, no. 3

2017

Abstract: One-Line shoreline evolution models have been used as a tool to understand and forecast long-term coastal evolution. However, in some coastal environments, where the influence of the wind is important, the limitations of existing models preclude its ... ...

Abstract	One-Line shoreline evolution models have been used as a tool to understand and forecast long-term coastal evolution. However, in some coastal environments, where the influence of the wind is important, the limitations of existing models preclude its direct application to characterize its effect on sediment transport processes. To fill this knowledge gap, we have developed a shoreline evolution model that includes the effect of wind on longshore sediment transport and accounts for beach-dune sedimentary exchange due to aeolian transport. The model produces quantitative estimates of sediment transport and exchanges rates alongshore, easing the assessment of the role of different forcing agents in coastline evolution. The model was applied to the Ebro north hemidelta coast. The results are used to discuss the relative importance of the wind interaction in the evolution of different coastline stretches. Aeolian sand transport at Riumar Beach could cause coastal erosion. At the rectilinear coast, aeolian exchange does not seem to influence the shoreline evolution but the wind-current interaction does. The model provides valuable data when considering the approach to be taken regarding conservation measures. Alongshore aeolian sediment transport can be useful when designing and placing aeolian sediment traps. Conservation of the Ebro north hemidelta coast needs to focus on increasing the river sediment supply. The application herein presented can be regarded as a first step in understanding wave and wind coupling effects in shoreline evolution.
Keywords	coasts ; eolian sands ; models ; rivers ; sediment transport ; sediment traps ; shorelines ; wind
Language	English
Dates of publication	2017-05
Size	p. 758-772.
Publishing place	Springer US
Document type	Article
ZDB-ID	2229170-2
ISSN	1559-2731 ; 1559-2723
ISSN (online)	1559-2731
ISSN	1559-2723
DOI	10.1007/s12237-016-0183-0
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