6 resultados para Carbón orgánico
em SAPIENTIA - Universidade do Algarve - Portugal
Resumo:
O presente artigo descreve o estudo experimental dum modelo reduzido de um cimbre autolançável reforçado com recurso à tecnologia de pré-esforço orgânico (OPS). Analisam-se os resultados obtidos e comprova-se que este sistema confere aos cimbres um significativo aumento da capacidade de carga, reduzindo simultaneamente as flechas de serviço. Confirmase também a exequibilidade técnica do sistema.
Resumo:
Dissertação de Mestrado, Comunicação, Cultura e Artes, Especialização em Teatro e Intervenção Social e Cultural, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2014
Resumo:
Tese dout., Ciências e Tecnologias do Ambiente, 2009, Universidade do Algarve
Resumo:
Tese de dout., Ciências Agrárias, Faculdade de Engenharia de Recursos Naturais, Univ. do Algarve, 2003
Resumo:
Thermal degradation and gaseous products evolving from the pyrolysis of sewage sludge, aimed at agricultural soil amendment, were investigated using Thermogravimetric Analysis in conjunction with Fourier Transform Infrared Analysis (TG-FTIR). The materials were studied in temperatures ranging from 30 to 800 ºC. Furthermore infrared spectra of sewage sludge samples were performed as a complementary technique. In parallel the sewage sludge was spiked with ibuprofen in order to test whether the mentioned techniques are able to detect the drug. Thermal analysis showed the range of 200-400ºC as the most characteristic for weight loss, corresponding with the organic matter volatilization, while the range of 500-800ºC was also characteristic and due to the volatilization of carbonates. On the other hand, ibuprofen-spiking tests identified at temperature range (150-250ºC) where the compound totally volatilizes, therefore, in this work, the detection of ibuprofen by TGA was established for concentrations higher than 0.5 g/kg sludge, concentration 102 times higher than the concentrations measured by other authors in regular sewage sludge (Martín, et al., 2010). A correlation has been found between the ibuprofen concentrations in the sludge and the intensity of the absorption bands, both for FT-IR spectra at the maximum emission temperature for ibuprofen (232ºC) as for the FT-IR spectra of the non-pyrolyzed samples.
Resumo:
Dissertação de mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015