Search results for "valori"
showing 10 items of 365 documents
Economia dell’informazione energetica nella società capitalistica. La rendita solare dell’ambiente naturale e costruito
2010
La valorizzazione economica di un’area è il risultato di «plusvalenze» o plusvalutazioni spaziali e temporali o economico-finanziarie che si con¬cretizzano, rispettivamente, nella rendita posizionale o differenziale e nella rendita assoluta. Se si considera il territorio come un bacino di energia rinnovabile, si può anche riconoscere l’esistenza di plusvalenze da potenziale energetico (o geo-cli¬ma¬-ti¬che) dovute direttamente o indirettamente al¬¬¬l’ir¬¬¬¬rag¬¬gia¬mento solare. Anche quest’ultima tipologia di plusvalenze ha na¬tura spazio-temporale e può contribuire alla formazione e intensificazione della rendita fondiaria e urbana. In questo scritto, si analizza l’influenza che l’uso del…
Un approccio multidisciplinare per lo studio del tesoro degli argenti di Morgantina
2015
Lo studio si inserisce nell’ambito della tutela e della valorizzazione del patrimonio artistico culturale, mettendo a servizio di metodiche tradizionali già consolidate lo sviluppo di nuove Tecniche per l’Informazione e la Comunicazione (TIC) dei Beni Culturali. In questa sede si descrivono alcune delle fasi di indagini di un progetto scientifico di ricerca pluridisciplinare che ha come finalità la tutela, la conservazione e il monitoraggio nel tempo di un prezioso nucleo di reperti in argento del cosiddetto “Tesoro di Eupolemo”. La collezione appartenente al Museo archeologico di Aidone, rappresenta un’inestimabile testimonianza del ricco patrimonio della nostra cultura isolana, di età ell…
3D PRINTED GREEN COMPOSITES BASED ON POLYMERIC MATRICES AND ANCHOVY FISHBONE WASTES
Techno-economic analysis of integrated processes for the treatment and valorisation of neutral coal mine effluents
2020
Abstract The disposal of highly-concentrated neutral coal mine effluents into the environment constitutes a severe threat to the natural ecosystem. This work proposes and compares five novel treatment chains to purify the effluent and recover raw materials. The chains present different combinations of pre-treatment and concentration technologies. In all cases, the solution sent to the concentration step is concentrated up to saturation to recover water and sodium chloride. Concerning the technical performances, the treatment chains are compared in terms of total energy demand and salt recovery. Furthermore, the economic feasibility assessment is performed via a novel global parameter, i.e. …
Valorization of seawater desalination brines through the integration of Eutectic Freeze Crystallization and Electrodialysis with Bipolar Membranes in…
2021
European policy encourages the adoption of sustainable systems that promote the efficient use and recovery of resources. Accordingly, this study proposes integrating two innovative technologies, including Eutectic Freeze Crystallization (EFC) and Electrodialysis with Bipolar Membranes (EDBM), for treating seawater desalination brines. Two experimental campaigns were conducted to assess the viability of this novel treatment chain. Using two lab-test rig units, the effect of various operating conditions on the outputs and general performance of both EFC and EDBM was evaluated. Firstly, results showed that EFC could manage seawater brines to (i) obtain pure sodium sulphate, and fresh water in …
EXPERIMENTAL CHARACTERIZATION OF ELECTRO-MEMBRANE PROCESSES FOR THE PRODUCTION AND STORAGE OF ENERGY
2022
Influence of Operational Strategies for the Recovery of Magnesium Hydroxide from Brines at a Pilot Scale
2022
The continuous depletion of minerals caused by land mining and the increase in their demand have pushed the development of novel sustainable technological processes for mineral recovery from unconventional sources. In this context, magnesium (Mg) has gained considerable attention for its peculiar properties and high relevance of its compounds, such as magnesium hydroxide, Mg(OH)2. In the present work, the influence of several operating conditions on the Mg(OH)2 precipitation process was thoroughly investigated by adopting a novel multiple feed-plug flow reactor. The influence of (i) initial Mg2+ concentrations in the feed stream; (ii) brine and alkaline flow rates; and (iii) the product rec…
A pilot-plant for the selective recovery of magnesium and calcium from waste brines
2021
Abstract The problem of brines disposal has raised great interest towards new strategies for their valorisation through the recovery of minerals or energy. As an example, the spent brine from ion exchange resins regeneration is often discharged into rivers or lakes, thus impacting on the process sustainability. However, such brines can be effectively reconcentrated, after removal of bivalent cations, and reused for the resins regeneration. This work focuses on developing and testing a pilot plant for selective recovery of magnesium and calcium from spent brines exploiting a novel proprietary crystallization unit. This is part of a larger treatment chain for the complete regeneration of the …
Effective magnesium recovery via seawater brines mining
In the last couple of decades, a rising interest has been focused on the research of novel and unconventional sources for mining minerals, such as industrial waste brines. As an example, brines are produced by desalination plants and discharged directly, or after being treated, into receiving water bodies possibly causing environmental concerns and renouncing the possibility to recover minerals [1,2]. Within this framework, the Water Mining WU-H2020 project aims at implementing an advanced Zero Liquid Discharge (ZLD) demo systems for the extraction of minerals and valuables products from industrial waste brines through a circular approach. The ZLD demo plant consists of: (i) Nano Filtration…