52 documents found, page 1 of 6
Life cycle assessment of lipid production from Pavlova gyrans: Influence of the...
Novais, Roberto Daniel Machado; Mata, Teresa M.; Madureira, Leandro Filipe Feiteira; Maciel, José Filipe Gonçalves; Vicente, A. A.; Martins, António A.Microalgae have been increasingly recognized as an alternative source of lipids, especially polyunsaturated fatty acids (PUFA) such as omega 3 and 6, being essential to carefully assess their life cycle environmental impacts. Hence, this work aims to carry out a life cycle assessment (LCA) of lipid production from the microalga Pavlova gyrans grown in different culture media and nutrient concentrations, on a cr...
Life cycle assessment and cost analysis of innovative agar extraction technolog...
Pereira, Sara Gonçalves; Martins, António A.; Mata, Teresa M.; Pereira, Ricardo Nuno Correia; Teixeira, J. A.; Rocha, Cristina M. R.Developing efficient and sustainable extraction technologies for valuable biocompounds from seaweed is crucial to overcome the limitations of conventional technologies. This study aims to compare three innovative technologies for agar extraction from two red seaweed species, G. sesquipedale and G. vermiculophylla: subcritical water extraction (performed at 125°C, 2.5atm, 1min, and at 140°C, 3.8atm, 1s), moderat...
Quaternary Earth-science and Palaeolithic conservation initiatives in the Tejo ...
Cunha, Pedro Proença; Bridgland, David R.; Figueiredo, Silvério; Martins, António A.; Allen, Peter; White, Mark J.Geoconservation measures in the River Tejo, the Portuguese reach of the Tagus, are compared with those in the Thames downstream of London (UK). Both are fluvio-estuarine reaches with staircases of Pleistocene depositional terraces, each with important sedimentary, palaeontological and archaeological records. In both rivers, conservation measures are in place that aim to protect these records, promote research a...
Life cycle assessment of biodiesel produced from sunflower oil from soil phytor...
Caetano, Nídia de Sá; Martins, António A.; Ribeiro, CristianaSoil contamination is a current problem, especially when this contamination is caused by heavy metals. In order to promote soil decontamination, less aggressive and economically feasible alternatives for soil remediation have been studied. For this purpose, the concept of phytoremediation emerges as an alternative. This technique consists in the use of plants with the purpose of decreasing the toxicity and the ...
Electron spin resonance dating of the culminant allostratigraphic unit of the M...
Gouveia, Margarida; Cunha, Pedro; Falguères, Christophe; Voinchet, Pierre; Martins, António A.; Bahain, Jean-Jacques; Pereira, AlcidesThe Cenozoic basins of western Iberia have a culminant allostratigraphic unit (designated UBS13), which records the beginning of Atlantic drainage and predates the fluvial incision that led to the development of the present drainage networks. However, the available numerical dating is quite limited and mainly restricted to the lower-level terrace deposits. Therefore, this study uses for the first time the elect...
Levantamento diferencial evidenciado pelas escadarias de terraços marinhos do C...
Gouveia, Maria Margarina Porto; Martins, António A.; Cunha, P. P.; Gomes, António Alberto; Falguères, Christophe; Voinchet, Pierre; Stokes, MartinThis study focuses on two marine terrace staircases of central Portugal: Cabo Raso (west of Lisboa) and Cabo Espichel (western Arrábida chain). Four emerse marine terraces were found in the Cabo Raso area, while twelve were found at Cabo Espichel, according to geomorphological and stratigraphical studies. Electron Spin Resonance and luminescence dating were used to establish a chronology for the coastal stairca...
Life cycle assessment of bioethanol from corn stover from soil phytoremediation
Mata, Teresa M.; Rodrigues, Sara; Caetano, Nídia; Martins, António A.Bioethanol is the most widely used biofuel in the world. Bioethanol production from biomass is a way to reduce crude oil consumption and the environmental pollution. This work aims to evaluate the potential environmental impacts of bioethanol production from corn stover obtained from phytoremediation, comparing four different acids (Sulfuric, Nitric, Hydrochloric and Acetic acids) to perform the biomass pre-tre...
Life cycle analysis of a combined electrolysis and methanation reactor for meth...
Federici, Flavio; Puna, Jaime; Mata, Teresa M.; Martins, António A.The need to decarbonize industrial processes and to increase the utilization of renewable resources, either energy and raw materials, has led to the development of new production processes. The focus of this paper is to evaluate the environmental impacts of an innovative 1 kW pilot plant for methane production, following the life cycle thinking approach. The process is based on the coupling of an alkaline water...
Composition, cultivation and potential applications of Chlorella zofingiensis –...
Gorgich, Malihe; Martins, António A.; Mata, Teresa M.; Caetano, NídiaChlorella zofingiensis has been in the center of attention due to its viability of cultivation, capability to yield various products, and applicability in various industrial sectors. Several research studies have evaluated this microalga as a bio-factory for carotenoids and lipids production, which are interesting compounds for industrial applications. The microalgae's robustness to various environmental and st...
Indoor Air Quality Improvement Using Nature-Based Solutions: Design Proposals t...
Mata, Teresa M.; Oliveira, Gisela M.; Monteiro, Helena; Silva, Gabriela Ventura; Caetano, Nídia; Martins, António A.Low indoor air quality is an increasingly important problem due to the spread of urbanization. Because people spend most of their time inside, poor indoor air quality causes serious human health issues, resulting in significant economic losses. In this work, the current state of affairs is presented and analyzed, focusing on the current problems and the available solutions to improve the quality of indoor air, ...