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Improving the transfer of dissolved oxygen in a biological Fe2+ oxidation process using a venturi jet as an intensive aeration system
(Elsevier, 2024-07-31)
Article
Restricted access - publisher's policyThe low bio-production of Fe3+ as a leaching agent is one of the main limitations to implementing industrial bio-processes at feasibility conditions. The main limitation of the bio-oxidation process of Fe2+ is the low ... -
Analysis of physical properties of coarse aggregates recovered from demolished concrete with a two-stage water jigs process for reuse as aggregates in concrete
(Multidisciplinary Digital Publishing Institute (MDPI), 2024-07-19)
Article
Open AccessThe present work analyses the physical characteristics of aggregates recovered with the waterjigging process from comminuted concrete. In this work, conventional concrete (C16/20) was crushed to a top size of 20 mm with a ... -
Development of a flow-cell bioreactor for immobilized sulfidogenic sludge characterization using electrochemical H2S microsensors
(Elsevier, 2024-06)
Article
Open AccessThe sulfate-reduction process plays a crucial role in the biological valorization of SOx gases. However, a complete understanding of the sulfidogenic process in bioreactors is limited by the lack of technologies for ... -
Sustainability assessment in mining: a CSR-based analysis model for social and environmental impact
(Springer, 2024-06-25)
Article
Open AccessA simple approach is proposed to study the main factors related to the mining activity’s impact on society, through a corporate social responsibility (CSR) qualitative analysis based on the type of raw materials extracted, ... -
Phenomenology of ultrafine particle concentrations and size distribution across urban Europe
(Elsevier, 2023-02)
Article
Open AccessThe 2017–2019 hourly particle number size distributions (PNSD) from 26 sites in Europe and 1 in the US were evaluated focusing on 16 urban background (UB) and 6 traffic (TR) sites in the framework of Research Infrastructures ... -
The variability of mass concentrations and source apportionment analysis of equivalent black carbon across urban Europe
(Elsevier, 2023-08-01)
Article
Open AccessThis study analyzed the variability of equivalent black carbon (eBC) mass concentrations and their sources in urban Europe to provide insights into the use of eBC as an advanced air quality (AQ) parameter for AQ standards. ... -
Corporate social responsibility and total factor productivity: the case of European mining industry
(2024-02-20)
Article
Open AccessThe aim of this research is to investigate the effect of corporate social responsibility (CSR) on total factor productivity (TFP) in the European mining industry, considering micro- and macroeconomic indicators of the ... -
Drivers of divergent trends in tropospheric ozone hotspots in Spain, 2008–2019
(Springer Netherlands, 2024)
Article
Open AccessThis study aimed to investigate the causes of contrasting ozone (O3) trends in Spanish O3 hotspots between 2008 and 2019, as documented in recent studies. The analysis involved data on key O3 precursors, such as nitrogen ... -
Constructing transferable and interpretable machine learning models for black carbon concentrations
(Elsevier, 2024-02-01)
Article
Open AccessBlack carbon (BC) has received increasing attention from researchers due to its adverse health effects. However, in-situ BC measurements are often not included as a regulated variable in air quality monitoring networks. ... -
A comparative study of quartz and potassium feldspar flotation process using different chemical reagents
(2024-02-04)
Article
Open AccessAn improved method for producing high-purity quartz (Qtz) and potassium feldspar (Kfs) concentrates was developed using various chemical reagents. Froth flotation experiments on a Qtz–Kfs mixture showed that quartz could ... -
Data mining of accidents in Spanish underground mines in the period 2003-2021 caused by a collision with a moving object
(Elsevier Ltd, 2024-01-30)
Article
Open AccessUnderground mining is currently one of the Spanish economic sectors with the worst accident rates. Besides, the most frequent type of accident, and with the most serious consequences, is the one in which the injured worker ... -
Microflow injection analysis based on modular 3D platforms and colorimetric detection for Fe(III) monitoring in a wide concentration range
(Springer Nature, 2023-12-02)
Article
Open AccessA modular microflow injection analysis (microFIA) system for the determination of Fe(III) in a bioleaching reactor has been designed, developed and validated. The different modules of the analyzer (mixer, diluter, disperser ...
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