6 documents found, page 1 of 1
Empirical ozone isopleths at urban and suburban sites through evolutionary proc...
Santos, FM; Gomez Losada, A; Pires, JCMOzone (O-3) is a reactive oxidant that causes chronic effects on human health, vegetation, ecosystems and materials. This study aims to create O-3 isopleths in urban and suburban environments, based on machine learning with air quality data collected from 2001 to 2017 at urban (EA) and suburban (CC) monitoring stations from Madrid (Spain). Artificial neural network (ANN) models have powerful fitting performance...
Outdoor Cultivation of the Microalga Chlorella vulgaris in a New Photobioreacto...
Lopes, AP; Santos, FM; Silva, TFCV; Vitor Vilar; Pires, JCMMicroalgae can be a future source of biomass with a wide range of applications, including its use to solve current environmental issues. One of the main variables for microalgal cultivation is the light supply: (i) its intensity that often does not present a uniform spatial distribution inside the culture; (ii) photoperiod; and (iii) spectrum. Therefore, this study aims to evaluate the growth of the microalgae ...
Negative emission technologies
Santos, FM; Gonçalves, AL; Pires, JCMCarbon dioxide (CO2) is an important greenhouse gas (GHG), which concentration in the atmosphere has been rising since the Industrial Revolution due to emissions from anthropogenic activities (mainly burning of fossil fuels). The continuous CO2 emissions may lead to a potentially irreversible climate change (global warming) and ocean acidification. Even if CO2 emissions could be cut to zero today, the environme...
Microalgal Consortia: From Wastewater Treatment to Bioenergy Production
Gonçalves, AL; Santos, FM; Pires, JCMCultivation of microalgae has been the focus of several research studies worldwide, due to the huge potential of these photosynthetic microorganisms in a wide range of applications, namely environmental and biotechnological ones. Regarding environmental applications, these microorganisms can play an important role in CO2 uptake and wastewater treatment processes and can be used as raw materials for bioenergy pr...
Carbon dioxide as geothermal working fluid: An overview
Esteves, AF; Santos, FM; Pires, JCMCarbon dioxide (CO2) has been proposed to be used as the geothermal working fluid, as it presents enhanced thermodynamic properties for this application when compared with the water-based system. This paper aims to present an overview of the recent research advances on CO2-based geothermal systems, particularly CO2-enhanced systems and CO2-plume geothermal energy technology. The results of the recent operationa...
Nutrient recovery from wastewaters by microalgae and its potential application ...
Santos, FM; Pires, JCMThe intensive agricultural practices are increasing the demand for chemical fertilizers, being currently produced from a non-environmental friendly way. Besides the environmental impacts, the nutrient uptake efficiency by the crops is very low, representing huge losses into the fields. Therefore, it is crucial to study alternatives for the current chemical fertilizers, which simultaneous improve nutrient effici...