Thesis Collection
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Browsing by Author "Bolívar Raya, Juan Pedro"
Now showing items 21-40 of 44
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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. ... -
Evaluación y caracterización de la contaminación acústica en un núcleo urbano de tipo turístico costero (El Portil, Huelva)
Sánchez Sánchez, Rafael (Universidad de Huelva, 2015)
El objetivo central de esta Tesis consiste en desarrollar una evaluación y caracterización del ruido existente en una ciudad turística costera del sur de España, en concreto el núcleo urbano de El Portil (Huelva) y su ... -
Evaluation of the impact produced by the Huelva phosphogypsum stacks on their estuarine environment
(Universidad de Huelva, 2021)The manufacturing of phosphoric acid from the chemical attack of the phosphate rock with sulfuric acid (wet process), generates phosphogypsum (PG) as a waste. PG is mainly composed of gypsum, but also contains high levels ... -
Fractionation and fluxes of metals and radionuclides during the recycling process of phosphogypsum wastes applied to mineral CO2 sequestration
Contreras Llanes, Manuel; Pérez López, Rafael; Gázquez González, Manuel Jesús; Morales Flórez, V.; Santos, Alberto; Esquivias, Luis; Bolívar Raya, Juan Pedro (Elsevier, 2015-11)
The industry of phosphoric acid produces a calcium-rich by-product known as phosphogypsum, which is usually stored in large stacks of millions of tons. Up to now, no commercial application has been widely implemented for ... -
Immobilization of Hazardous Wastes on One-Part Blast Furnace Slag-Based Geopolymers
Paz Gómez, Daniela Carolina; Silveirinha Vilarinho, Inês; Pérez Moreno, Silvia María; Carvalheiras, João; Guerrero Márquez, José Luis; Miguel Novais, Rui; Seabra, Maria Paula; Ríos Ransanz, Guillermo; Bolívar Raya, Juan Pedro; Labrincha, João António (MDPI, 2021)
: The immobilization of hazardous wastes in ordinary Portland cement (OPC)-based materials has been widely studied and implemented. OPC-based materials have a high carbon footprint associated with their production and ... -
Influence of State of Alarm Caused by COVID-19 on Noise in the City Centre of Huelva (Spain)
Fortes Garrido, Juan Carlos; Sánchez Sánchez, Rafael; Bolívar Raya, Juan Pedro (Polish Academy of Sciences, 2022)
At the beginning of the COVID-19 pandemic the government of Spain decreed the State of Alarm to confine the entire population at their homes, except for essential services. Therefore, the central objective of this study ... -
Influence of the accumulation chamber insertion depth to measure surface radon exhalation rates
Gutiérrez Álvarez, Isidoro; Guerrero Márquez, José Luis; Martín Domínguez, José Enrique; Adame Carnero, José Antonio; Bolívar Raya, Juan Pedro (Elsevier, 2020)
A common method to measure radon exhalation rates relies on the accumulation chamber technique. Usually, this approach only considers one-dimensional gas transport within the soil that neglects lateral diffusion. However, ... -
Influencia del CO2 alimentado en la corriente de combustible en pilas de combustible tipo PEM de baja y alta temperatura
(Universidad de Huelva, 2015)De entre todas las impurezas que pueden existir en el combustible alimentado a una PEMFC, el estudio de la influencia del C02 es de gran interés debido a las altas concentraciones que del mismo pueden estar presentes en ... -
Manufacture of ceramic bodies by using a mud waste from the TiO2 pigmentindustry
Contreras Llanes, Manuel; Martín, M. I.; Gázquez González, Manuel Jesús; Romero, M.; Bolívar Raya, Juan Pedro (Trans Tech Publications, 2015)
The main objective of this paper is focused in the use of a waste generated by the TiO2 pigment industry, ilmenite mud (MUD), on the production of ceramic bodies. These ceramic bodies were produced from mixtures of a ... -
Metabarcoding data of prokaryotes and eukaryotes inhabiting the phosphogypsum stockpiles on the salt marshes of Huelva (SW Spain)
Gómez Villegas, Patricia; Guzmán Guerrero, José Luis; Pérez Rodríguez, Miguel; Bolívar Raya, Juan Pedro; Vigara Fernández, Javier; León Bañares, Rosa María (Elsevier, 2022-02-22)
Around 100 Mt of phosphogypsum (PG) of extreme acidity and with high concentrations of heavy metals and radionuclides have been deposited on the salt marshes of the Tinto River estuary in Huelva (SW Spain) for more than ... -
Phosphogypsum as additive 1 for foamed bitumen 2 manufacturing used in asphalt paving
Cuadri Vega, Antonio Abad; Pérez Moreno, Silvia María; Altamar, C.L.; Navarro Domínguez, Francisco Javier; Bolívar Raya, Juan Pedro (Elsevier, 2021-02)
The aim of this work was to use phosphogypsum (FY) waste in a sustainable paving practice involving the production of FY-foamed bitumen for road applications. For this proposal, three FY types coming from different fertilizer ... -
Radiological and chemical risks by waste scales generated in the titanium dioxide industry
Gázquez González, Manuel Jesús; Mantero, J.; Mosqueda Peña, Fernando; Vioque, I.; García-Tenorio, R.; Bolívar Raya, Juan Pedro (Elsevier, 2021)
Along the industrial process devoted to the production of titanium dioxide pigments by using ilmenite as main raw material, small residues amounts are generated, remaining clearly enriched in natural radionuclides and ... -
Radon transport events associated with the impact of a NORM repository in the SW of Europe
Gutiérrez Álvarez, Isidoro; Guerrero Márquez, José Luis; Martín Domínguez, José Enrique; Adame Carnero, José Antonio; Vargas, A.; Bolívar Raya, Juan Pedro (Elsevier, 2021)
Two radon measurement stations located to the north and south of a NORM (Naturally Occurring Radioactive Materials) repository of phosphogypsum (southwest of Europe) were used to monitor radon behavior during 2018. The ... -
Recycled Aggregates from Construction and DemolitionWaste in the Manufacture of Urban Pavements
Contreras Llanes, Manuel; Romero, Maximina; Gázquez González, Manuel Jesús; Bolívar Raya, Juan Pedro (MDPI, 2021)
Construction and Demolition Waste (CDW) is among the largest waste streams in the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the ... -
Seasonal evolution of natural radionuclides in two rivers affected by acid mine drainage and phosphogypsum pollution
Guerrero Márquez, José Luis; Gutiérrez Álvarez, Isidoro; Hierro Gutiérrez, Almudena; Pérez Moreno, Silvia María; Olías Álvarez, Manuel; Bolívar Raya, Juan Pedro (Elsevier, 2021-02)
The Odiel and Tinto rivers show singular characteristics due to the significant acid mine drainage (AMD) generated in the first section of their basins and the phosphogypsum (PG) stacks located on their common estuary. AMD ... -
Spatiotemporal evolution of U and Th isotopes in a mine effluent highly polluted by Acid Mine Drainage (AMD)
Guerrero Márquez, José Luis; Suárez Vaz, Nuria; Paz Gómez, D. C.; Pérez Moreno, Silvia María; Bolívar Raya, Juan Pedro (Elsevier, 2023)
The spatiotemporal evolution of both U and Th isotopes in a mine effluent highly polluted by acid mine drainage (AMD) was evaluated. The acidic tributary, which born from the outflows of an abandoned sulfide mine, flows into ... -
Study of radon exhalation rates and its influence on ambient radon concentrations in the city of Huelva
(Universidad de Huelva, 2020)According to United Nations Committee on Ionizing Radiation (UNSCEAR), radon gas is responsible for 42 % of the dose from natural radiation sources. The most common radon isotope, 222Rn, is emitted from materials with ... -
Use of a fuzzy qualitative model to reanalyze radon relationship with atmospheric variables in a coastal area near a NORM repository
Gutiérrez Álvarez, Isidoro; Aroba Páez, Javier; Martín Domínguez, José Enrique; Adame Carnero, José Antonio; Bolívar Raya, Juan Pedro (Elsevier, 2022-11)
A soft computing methodology, PreFuRGe (Predictive Fuzzy Rules Generator), was applied to study atmospheric radon in relation to other meteorological variables. This algorithm is based on fuzzy clustering and generates a ... -
Uso del residuo industrial yeso rojo como sustituto del yeso natural para la fabricación de cementos comerciales
Gázquez González, Manuel Jesús; Bolívar Raya, Juan Pedro; Vaca Galán, Federico; García-Tenorio, R.; Mena Nieto, Ángel Isidro (Consejo Superior de Investigaciones Científicas, 2012)
El objetivo de esta investigación ha sido analizar la valorización de un residuo generado en el proceso de producción de dióxido de titanio (vía sulfato), denominado yeso rojo, en la producción de cementos. Dicho ... -
Valorisation of ilmenite mud waste in the manufacture of commercial ceramic
Contreras Llanes, Manuel; Martín, M. I.; Gázquez González, Manuel Jesús; Romero, M.; Bolívar Raya, Juan Pedro (Elsevier, 2014)
This paper reports the results of a study focused on the production of ceramic tiles from ilmenite mud (MUD), a waste generated by the industry devoted to the TiO2 pigment production. Ceramic tiles were produced from ...
