ARROYO TORRALVO , Fátima

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Although the transition from linear to circular economy is being carried out by many different actors, there is still not a well-established methodology for its assessment. In this paper, a review of available approaches for evaluating circular economy (technical and biological cycles) has been conducted. In total, 2.113 information sources...

Procedimiento para la recuperación de germanio en disolución mediante complejación y utilización de resinas de intercambio iónico.La presente invención describe un procedimiento para la recuperación de germanio en disolución acuosa, mediante resinas de in

The valorization of a coal gasification fly ash was studied by leaching the fly ash using different aqueous solutions followed by the subsequent precipitation of the germanium solubilized from the ash. Experimental investigations were focused on the precipitation of a germanium2catechol (CAT) complex with cetyl trimethyl ammonium bromide...

Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant (200 kg of fly ash/h). The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent...

The study of the stone surface was helpful before the restoration of the Sevilla City Hall façade. This study supplied information of the environmental factors affecting the stone and the restoration treatments used in previous interventions. The stone was thin grained carbonate constituted essentially by fragments of bioclasts and fine...

The study of the stone surface was helpful before the restoration of the Sevilla City Hall façade. This study supplied information of the environmental factors affecting the stone and the restoration treatments used in previous interventions. The stone was thin grained carbonate constituted essentially by fragments of bioclasts and fine sand....

A framework for assessing, from a sustainability and circular bioeconomy point of view, the best valorization approach for biorefineries side-streams has been developed and validated. Two biorefinery side streams are considered as case-studies for validation: rapeseed meal from biodiesel and corn oil from bioethanol production. Firstly, a...

Recently, biorefineries have emerged globally as an attractive alternative to conventional fuel production, but costs still need to be competitive. Latest policy actions such as the Green Deal or the Circular Economy Action Plan encourage maximising the biomass-to-products value chain through the use of all valuable compounds available in...

Acid mining drainage has a serious impact on the environment. Forward osmosis allows the concentration of acid mine waters to favor the formation of enrichment sludges and subsequent selective metal precipitation. In this work, a methodology was proposed to treat mining effluents from the Iberian Pyrite Belt. Forward osmosis experiments were...

La presente invención se engloba en el campo de las tecnologías química y medioambiental, y se refiere a un sistema y a un método de alta eficiencia energética para la concentración de soluciones salinas (que pueden ser denominadas de forma genérica como

En los colorímetros que existen en el mercado, la luz se recoge mediante un tubo de cierto diámetro y los valores de las coordenadas cromáticas que da el medidor son una media de las obtenidas en dicha superficie. Cuando la superficie a medir no tiene un color uniforme, como ocurre en el caso de los materiales pétreos, la medida de color es más...

En los colorímetros que existen en el mercado, la luz se recoge mediante un tubo de cierto diámetro y los valores de las coordenadas cromáticas que da el medidor son una media de las obtenidas en dicha superficie. Cuando la superficie a medir no tiene un color uniforme, como ocurre en el caso de los materiales pétreos, la medida de color es más...