Thesis Collection
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Browsing by Author "Bolívar Raya, Juan Pedro"
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A comparative study of alternative methods for 210Pb determination in environmental samples
Cuesta Beltrán, Estefanía; Barba Lobo, Alejandro; Lozano Bermejo, Rafael Luis
; Gutiérrez de San Miguel Herrera, Enrique; Mosqueda Peña, Fernando; Bolívar Raya, Juan Pedro (Elsevier, 2021)
The accurate determination of the levels of 210Pb in environmental samples (e.g. atmospheric aerosols, waters, soils, biota, etc.) is essential due to its multiple applications in geochronology, radiation protection, ... -
A general methodology to determine natural radionuclides by well-type HPGe detectors
Barba Lobo, Alejandro; Gutiérrez de San Miguel Herrera, Enrique; Lozano Bermejo, Rafael Luis; Bolívar Raya, Juan Pedro (Elsevier, 2021)
This work aims to determine natural radionuclides (210Pb, 228,226Ra, 234,228Th and 40K) in NORM samples by well-type HPGe detectors because they are of vital importance in studies on environmental samples. For this, a novel ... -
A new efficiency calibration methodology for different atmospheric filter geometries by using coaxial Ge detectors
Barba Lobo, Alejandro; Bolívar Raya, Juan Pedro (Springer Science and Business Media LLC, 2023)
The study of the different pollutants present in atmospheric aerosols such as trace elements and radionuclides is essential to assess the air quality. To analyze the particulate matter (PM), atmospheric filters with different ... -
A practical and general methodology for efficiency calibration of coaxial Ge detectors
Barba Lobo, Alejandro; Bolívar Raya, Juan Pedro (Elsevier, 2022-05-06)
The correct determination of artificial and natural radionuclides like 152Eu, 137,134Cs, 60,57Co, etc., and 234,228Th, 228,226Ra, 210Pb and 40K, respectively, is essential for many environmental science fields. For this, ... -
A Practical Procedure to Determine Natural Radionuclides in Solid Materials from Mining
There are many regulations related to the radiological control of NORMs (Naturally Occurring Radioactive Materials) in activities such as mining, industry, etc. Consequently, it is necessary to apply fast and accurate ... -
A Review of the Commercial Uses of Sulphate Minerals from the Titanium Dioxide Pigment Industry: The Case of Huelva (Spain)
Gázquez González, Manuel Jesús; Contreras Llanes, Manuel; Pérez Moreno, Silvia María; Guerrero Márquez, José Luis; Casas Ruiz, Melquiades; Bolívar Raya, Juan Pedro (MDPI, 2021)
This study was focused on the historical evolution of the waste management policy carried out by the Spanish industry devoted to titanium dioxide pigments manufacturing for minimising its environmental impact. This challenge ... -
A simple and precise methodology to determine particulate matter mass in atmospheric filters; validation and application cases
Barba Lobo, Alejandro; Gutiérrez Álvarez, Isidoro; Adame Carnero, José Antonio; Bolívar Raya, Juan Pedro (Elsevier, 2022-11-01)
In the past decades, particulate matter (PM) measurements have been used extensively in atmospheric sciences, as it allows studying the evolution of tracers for different atmospheric processes and the effects of atmospheric ... -
An upgraded lab-based method to determine natural γ-ray emitters in NORM samples by using Ge detectors
Barba Lobo, Alejandro; Mosqueda Peña, Fernando; Bolívar Raya, Juan Pedro (Elsevier, 2021-09-11)
The regulation existing on NORM activities requires the accurate and quick measurement of natural radionuclides in a wide range of matrices by gamma spectrometry. The aim of this work has been to develop a comprehensive ... -
Analysing the performance of radiological monitoring network during nuclear accidents
Sangiorgi, Marco; Hernández Ceballos, Miguel Ángel; Bolívar Raya, Juan Pedro (Elsevier, 2023)
JRODOS was used to simulate the dispersion of airborne radioactive material from a point source over the period 2012–2015. In total, 1331 radioactive plumes were simulated with the objective to investigate the influence ... -
Arsenic removal procedure for the electrolyte from a hydro-pyrometallurgical complex
Paz Gómez, D. C.; Pérez Moreno, Silvia María; Gázquez González, Manuel Jesús; Guerrero Márquez, José Luis; Ruiz Oria, I.; Ríos Ransanz, Guillermo; Bolívar Raya, Juan Pedro (Elsevier, 2021)
Commercial copper (Cu) is obtained by a hydro-pyrometallurgical process, where the Cu anodes obtained in the furnaces (Cu > 99.5%) are enriched up to 99.99% in “cathodes” by electrorefining at an electrolysis plant. During ... -
Behaviour of heavy metals and natural radionuclides in the mixing of phosphogypsum leachates with seawater
Guerrero Márquez, José Luis; Pérez Moreno, Silvia María; Gutiérrez Álvarez, Isidoro; Gázquez González, Manuel Jesús; Bolívar Raya, Juan Pedro (Elsevier, 2021-01)
Phosphogypsum (PG) is disposed worldwide in large stacks usually placed in coastal zones, as in the case of Huelva (SW of Spain), where around 100 Mt of PG are stored on the salt marshes of the Tinto River estuary covering ... -
Caracterización de la radiación ultravioleta en la provincia de Huelva e incidencia en la productividad y el valor biotecnológico de cultivos de interés comercial
Casal Bejarano, Carlos (2008)
En esta tesis se han caracterizado los niveles de radiación ultravioleta (UV-A; UV-B) y fitosintéticamente activa (PAR) recibidos en la costa occidental onubense durante el período 2004 – 2006, evaluando el riesgo de la ... -
Caracterización meteorológica y modelización de Andalucía occidental
(Universidad de Huelva, 2011)El origen de esta Tesis se basa en la necesidad de disponer de información meteorológica detallada que permita un mayor conocimiento de los procesos físico-químicos que se desarrollan en Andalucía occidental. Por ello, ... -
Caracterización y comportamiento del ozono superficial en la provincia de Huelva
Adame Carnero, José Antonio (Universidad de Huelva, 2005)
El desarrollo de las actividades antropogénicas ha llevado al incremento de las concentraciones de ozono en la baja troposfera. La provincia de Huelva presenta una serie de condiciones ideales para la formación y acumulación ... -
Caracterización y valorización de residuos generados en la industria de producción de dióxido de titanio
Gázquez González, Manuel Jesús (Universidad de Huelva, 2010)
Los objetivos principales de esta tesis son, por un lado la caracterización de las materias primas y los sub-productos (co-productos y residuos) generados en el proceso industrial de obtención de dióxido de titanio, ... -
Caracterización y valorización de residuos inorgánicos procedentes de industrias químicas de Huelva
(Universidad de Huelva, 2018)Waste is currently one of the most serious environmental problems arising from the economic and social development of human beings, mainly because of the amount of waste continues to increase year after year. The emergence ... -
Characterization of Two Sludges from a Pyrometallurgical Copper Smelting Complex for Designing a Se and Pb Recovery Proposal
Paz Gómez, D. C.; Pérez Moreno, Silvia María; Ruiz Oria, I.; Bolívar Raya, Juan Pedro (Springer, 2020-08)
Gas scrubbing sludge (SS) and fine dust of converters (SC) are wastes generated in the off-gas cleaning system of smelting and converting processes. Both wastes are considered hazardous materials due to their high metal ... -
Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving
Contreras Llanes, Manuel; Bolívar Raya, Juan Pedro; Gázquez González, Manuel Jesús; Romero, Maximina (Springer, 2021-09-10)
Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were ... -
Efecto de las simulaciones interactivas sobre las concepciones de los alumnos en relación con el movimiento armónico simple
García Barneto, Agustín; Bolívar Raya, Juan Pedro (Universidade de Vigo, 2008-12)
Muchos alumnos universitarios mantienen concepciones equivocadas acerca del movimiento armónico simple (MAS). Se ha podido comprobar que, en relación con él, mantienen una visión lineal que las simulaciones informáticas, ... -
Estimación del aporte de contaminantes de la balsa de fosfoyesos al Estuario de Huelva
Pérez López, Rafael; Miguel Sarmiento, Aguasanta; Carrero Romero, Sergio; Cruz Hernández, Pablo; Macías Suárez, Francisco; Nieto Liñán, José Miguel; Bolívar Raya, Juan Pedro (Sociedad Española de Mineralogía, 2014)
La producción de ácido fosfórico mediante ataque húmedo en el Polo Químico de Huelva conduce a la acumulación de un sub-producto conocido como fosfoyeso. El fosfoyeso contiene impurezas de metales tóxicos y radionucleidos. ...
