ME - Capítulos de livros
Permanent URI for this collection
Browse
Browsing ME - Capítulos de livros by Issue Date
Now showing 1 - 5 of 5
Results Per Page
Sort Options
- Recuperação de lítio de minérios portugueses de lepidolitePublication . Nogueira, CarlosNeste artigo são apresentados de forma sumária alguns resultados dos trabalhos de investigação realizados no LNEG (e ex-INETI) sobre o desenvolvimento de processos de recuperação metalúrgica de lítio de minérios pegmatíticos de lepidolite. Foram estudadas e testadas várias tecnologias como a calcinação seguida de digestão ácida, e a lixiviação carbonatante sob pressão, tendo esta última permitido produzir carbonato de lítio de boa pureza.
- CortiçaPublication . Gil, Luís
- History, synthesis, properties, applications and regulatory issues of prebiotic oligosaccharidesPublication . Tymczyszyn, E. E.; Santos, M. I.; Costa, Maria do Céu; Illanes, A.; Gomez-Zavaglia, A.In this chapter, the health promoting effects of carbohydrate prebiotics are addressed. A brief description of their synthesis, thermo-physical properties, mechanisms of action, technological applications and current regulatory issues are presented.
- Collection of waste batteries in Portugal and BrazilPublication . Vieceli, N.; Margarido, F.; Durão, F.; Guimarães, C.; Nogueira, CarlosThe legal aspects governing the disposal of used batteries were established in the nineties of the last century in Brazil and Portugal. In Brazil the law establishes the implementation of a reverse logistics system of this waste, similar to the system of Portugal, in which there is an extended producer responsibility. Portugal, subjected to the targets set by the European Union, has increased collection rates, with emphasis on the role of management entities. In Brazil, progress and the development of strategies to increase the collection rate have been observed, nevertheless, challenges associated with the increase of the coverage of the collection of batteries and also the public information about the disposal are relevant, as well as combating irregularities. Moreover, given the growing concern over the shortage of raw materials, proper management, including the collection and recycling of these wastes, can be seen as an important opportunity for both countries.
- The role of automated sorting in the recovery of aluminium alloys wastePublication . Nogueira, Carlos; Trancoso, Maria Ascensão; Pedrosa, Fátima; Crujeira, Teresa; Oliveira, Paula; Gonçalves, Ana Maria; Margarido, F.; Santos, R. Novais; Durão, F.; Guimarães, C.A large number of aluminium alloys with varying alloying elements are present in vehicle structures and components, as well as in other household equipment. The recycling of these alloys is nowadays processed to low quality metal products due to high level of contamination, hindering the upgrading of recycling rates. The development and application of automated sorting technologies capable to detect, select and separate different alloy types could be of crucial importance in the progression of the recycling loop. This paper addresses the importance of sorting based on a study on the characterization of Al alloys in non-ferrous fraction of shredder plants.