Alberto Alcolea

Alberto Alcolea
Universidad Politécnica de Cartagena | UPCT · SAIT

About

19
Publications
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429
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Publications

Publications (19)
Conference Paper
The objective is to determine the recovery capacity of critical metals from secondary sulphates generated by tailings. Fifteen efflorescence samples collected in the field and 19 laboratory samples from the column evaporation process were studied. The mineral composition was determined by XRD and chemistry by X-ray fluorescence spectrometry. The...
Conference Paper
Full-text available
This article presents a methodology for mapping anthropogenic materials. This is applied to an area affected by mining and industrial activities. The Sierra de Cartagena–La Unión (SE Spain), a 2,500-year-old mining district extending over an area of 100 km2. The anthropogenic cartography illustrates the existence of 12 open-pits, 1,902 mining wells...
Article
Full-text available
Based on research carried out at 67 tailings dams in Spain: (1) tailings dams contain alternating sedimentary layers with contractive and dilative geomechanical behaviours; (2) tailings saturate quickly but drain more than 10 times slower due to the high-suction capacity of the porous sediments (2–300 MPa); and (3) over the long-term, a stationary...
Article
Solid state transformations of PdCl2, [PdCl2(PPh3)2], [Pd(PPh3)4], RuCl3⋅H2O, [RuCl2(p‐cymene)]2 and [RuCl2(PPh3)3] in three different atmospheres (N2, air and O2) have been studied by heating to 1000 °C/1400 °C these palladium/ruthenium compounds. The products obtained this way have been characterized by X‐ray diffraction and its specific formulat...
Article
The presence of primary microplastics in the environment isconsidered a major concern because of three main reasons: the physical damage to organisms that ingest them, the leaching of constituent contaminants such as monomers or additives, and the sorption of inorganic and organic chemicals. Microbeads collected from four facial cleansers, a person...
Article
The presence of microplastics and synthetic microfibers in the environment is increasing, causing an accumulation in the food chain because their ingestion by different organisms in the ecological community. This paper deals with the importance of wastewater treatment plants (WWTPs) as a source of microplastics and microfibers from the sludge to th...
Thesis
The aim of this thesis was to contribute to the interpretation of the geogenic and anthropogenic factors, at local (hydrographic basin) and regional levels, that control the geoavailability (solubility and mobility) of Ni, Cu, Zn, As, Cd, and Pb in the Sierra Minera de Cartagena – La Unión, as well as to evaluate the influence of the abandoned mini...
Article
The aim of this paper was to compare the chemical composition of human teeth with other mammal species that are likely candidates for replacing them in studies that test dental material. Dentine and enamel fragments extracted from 400 sound human, bovine, porcine and ovine - 100 teeth per species - incisors and molars were mechanically ground up to...
Conference Paper
Full-text available
This study is based on the evaluation of the sudden entrance of mining wastes through 3 wadis that flow into Mediterranean Sea (South watershed of the Sierra de Cartagena – La Unión) and 5 wadis that flow into the Mar Menor lagoon (North watershed). In every wadi, water quality during a dry period was compared with that soon after a stormwater runo...
Conference Paper
Full-text available
It is important to know the mechanical behaviour of mine slurries: (1) to help minimize tailings-dam failure events; (2) to establish protection zones for those sensitive areas (communities, industries, ecosystems) which might be affected by the structural failure of tailings dams. This study deals with the determination of yield stress in sediment...
Article
Full-text available
This study assessed the influence of the Sierra Minera de Cartagena – La Unión mining wastes on the surrounding areas, due to the sediment transport in the atmosphere. Monitoring of 15 weather STATIONS located in the Campo de Cartagena land (SE Spain) was performed in the period December, 2004–March, 2008. A total of 920 rainfall water samples were...
Article
The environmental effects of extensive mineral extractions have been the focus of recent remediation efforts in the Poopó and Uru-Uru lakes (Bolivia). Our study determined the chemical and mineral composition of salt and water samples collected in mine areas (MA) and natural sites [basin and lakes (BL), Salar de Uyuni (SU)] in the Oruro mining dist...
Article
The residue of heating to 900 °C in dynamic air atmosphere palladium coordination/organometallic complexes that do not contain P-donor ligands is Pd in purity close to 95%. This is a suitable method for recovering palladium from excess samples produced in research laboratories. When P-containing ligands, free or coordinated to palladium, are includ...
Article
A study of the molecular structure of regio-regular bulk poly-3-octyl-thiophene (P3OT) and poly-3-hexyl-thiophene (P3HT) and the phase transitions during heating and cooling scans in a temperature range of –158–773 °C has been performed by means of calorimetry of bulk samples and grazing incidence X-ray diffraction from synchrotron radiation. Addit...
Article
Full-text available
This study is focused on the influence of a particular open limestone channel (OLC) on the quality of the surface water drained from an intermittent watercourse. The OLC was constructed along a creek surrounded by upstream tailings deposits, in an extensive, abandoned sulfide-mining site, which generates acidic and heavy metals-rich drainage water...
Article
Full-text available
The aim of this study is to employ a thermogravimetric analyzer coupled to a mass spectrometer to research into the influence of heating rate and sample mass on the response of the detector. That response is examined by means of a particular efflorescence taken from an acid mine drainage environment. This mixture of weathered products is mainly com...
Conference Paper
AB: Cucumber fruit tissues were studied using Cryo-Scanning Electron Microscopy (Cryo-SEM). Samples were frozen and conditioned with the PolarPrep 2000 Cryo Transfer System (Quorum Technologies, East Sussex, England), and were observed with a Scanning Electron Microscope (S-3500N, Hitachi, Ratingen, Germany). The PolarPrep 2000 Cryo Transfer System...