Sociología del campo filosófico español entre el Franquismo y la Transición democrática: una validación cuantitativa

La más reciente investigación dedicada al análisis del campo filosófico español entre el tardofranquismo y la Transición, señaló la existencia de dos redes intelectuales: una, denominada «oficial», que aglutinaba a los filósofos de perfil más estrictamente académico (v. g. Sergio Rábade), y otra, designada como «alternativa», que integraba a los pensadores más vanguardistas (v. g. López Aranguren). Los materiales utilizados en La filosofía española. Herederos y pretendientes. Una lectura sociológica (1963-1990) (Vázquez García 2009), fueron objeto en esta obra de una aproximación cualitativa. Nuestro objetivo en este artículo, privilegiando la fiabilidad sobre la validez, es la realización de un análisis de correspondencias múltiples, en el que se han cuantificado más de 15 variables sobre cincuenta filósofos españoles. En las conclusiones se profundiza en las diferencias y similitudes entre los resultados obtenidos con las metodologías cualitativa y cuantitativ

Metal release from contaminated estuarine sediment under pH changes in the marine environment

The contaminant release from estuarine sediment due to pH changes was investigated using a modified CEN/TS 14429 pH-dependence leaching test. The test is performed in the range of pH values of 0-14 using deionised water and seawater as leaching solutions. The experimental conditions mimic different circumstances of the marine environment due to the global acidification, carbon dioxide (CO2) leakages from carbon capture and sequestration technologies, and accidental chemical spills in seawater. Leaching test results using seawater as leaching solution show a better neutralisation capacity giving slightly lower metal leaching concentrations than when using deionised water. The contaminated sediment shows a low base-neutralisation capacity (BNCpH 12 = -0.44 eq/kg for deionised water and BNCpH 12 = -1.38 eq/kg for seawater) but a high acid-neutralisation capacity when using deionised water (ANCpH 4 = 3.58 eq/ kg) and seawater (ANCpH 4 = 3.97 eq/kg). Experimental results are modelled with the Visual MINTEQ geochemical software to predict metal release from sediment using both leaching liquids. Surface adsorption to iron- and aluminium- (hydr)oxides was applied for all studied elements. The consideration of the metal-organic matter binding through the NICA-Donnan model and Stockholm Humic Model for lead and copper, respectively, improves the former metal release prediction. Modelled curves can be useful for the environmental impact assessment of seawater acidification due to its match with the experimental values.This work was supported by the Spanish Ministry of Economy and Competitiveness, Project No. CTM 2011-28437-C02-01, ERDF included. M. C. Martı´n-Torre was funded by the Spanish Ministry of Economy and Competitiveness by means of FPI. Fellowship No. BES-2012-053816