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- Interferences minimization using solid phase extraction in a multiparametric sequential injection systemPublication . Ribas, Tânia C. F.; Croft, Charles F.; Moniz, Tânia; Almeida, M. Inês G.S; Mesquita, Raquel B. R.; Rangel, Maria; Kolev, Spas D.; Rangel, António O. S. S.
- The effect on the GHG emissions and energy consumption of MSW management practices on Porto CityPublication . Xará, S.; Almeida, M. F.; Silva, M.; Costa, C.The present case study was developed for the municipality of Porto, the second largest city of Portugal that has near 300 000 inhabitants. Due to legislative evolution, some changes have been implemented on MSW management practices since 1990 leading to meaningful improvements on energy consumption and greenhouse gases emissions. Two situations were compared: (i) the first one concerns the situation in 1990 where the MSW produced was collected, a meaningful fraction of it was composted and the residual waste dumped; and, (ii) the second situation where the EU legislation on recycling targets for packaging material and diversion of organic waste from landfills was taken into account, including an incineration plant on the management system. Greenhouse gas emissions from these two management scenarios were calculated based on an inventory model developed by White et al (1992). Weighting factors for the different gases based on the recommendations of the Intergovernmental Panel on Climate Change were used to aggregate the emissions values and obtain a simple and comparable result for each situation. Results show the advantage of the 2000 practices both in terms of energy consumption and emissions of gases with greenhouse effect.
- Porto 1990/2000: Evaluation of environmental burdens from MSW management using Life Cycle AssessmentPublication . Xará, Susana; Almeida, M. F.; Silva, M.; Costa, C.The environmental burdens to air and water resulting from the MSW management practices in the municipality of Porto were evaluated for 1990 and 2000 using the model developed by White et al (White et al, 1995). The operations considered in the study are collection, sorting, biological treatment, thermal treatment and landfilling. Savings from energy and recycling of recovered materials are also quantified. For each pollutant, the main source, among the operations considered, was identified. Results have shown that landfilling was the main source for air and water emissions in 1990, followed by collection. In 2000, thermal treatment was the main source for air pollutants and landfilling the main source of water pollutants, in both cases followed by collection. In 1990, collection was the main source for air emissions of particulates, CO, NOx, SOx to air, and of Organic compounds, Phenol and Fluoride to water. In 2000 it was the main source of NOx to air and TOC, phenol, total metals and fluoride to water. Biological treatment was the main source of N2O and nitrate to air in 1990 and of BOD, COD and ammonia to water in 2000.
- Polymer inclusion membranes (PIMs) as an alternative solid phase extraction (SPE) material: Comparison studies between batch and flow procedurePublication . Ribas, Tânia C. F.; Croft, Charles; Mesquita, Raquel B. R.; Almeida, M. Inês G. S.; Kolev, Spas D.; Rangel, António O. S. S.
- A aplicação da análise do ciclo de vida no planeamento da gestão integrada de resíduos sólidos urbanosPublication . Xará, S.; Silva, M.; Almeida, M. F.; Costa, C.
- Simulation of green beans (Phaseolus vulgaris, L.) quality loss throught the frozen foods distribution chainPublication . Martins, R.C.; Almeida, M.G.; Silva, C. L. M.
- Evaluation of MSW management practices in Portugal using Life Cycle AssessmentPublication . Xará, S.; Almeida, M. Fonseca; Silva, M.; Costa, C.This paper describes a case study where the evolution of MSW management practices for three municipalities in Portugal were analyzed using the Life Cycle Assessment technique. This evolution was mainly due to legislative pressures that led to changes in MSW collection and treatment or disposal systems implemented between 1990 and 2000. The municipalities participating in the study were Porto, Maia and Gondomar, all part of LIPOR, the intermunicipal entity responsible for the MSW management of 8 municipalities in the Porto region. Environmental burdens from these two management scenarios were calculated based on an inventory model developed by White et al. (1995), using some on-site specific parameters related with the system's operation conditions. Results show the advantage of the 2000 practices, both in terms of energy consumptio and emissions of gases with greenhouse effect.
- Specially designed hydrophilic 3,4-HPO chelators to be used as chromogenic reagents for iron in a microfluidic paper-based analytical devicePublication . Moniz, Tânia; Bassett, Chelsea R.; Almeida, M. Inês G. S.; Kolev, Spas D.; Rangel, Maria; Rangel, António O. S. S.; Mesquita, Raquel B. R.
- Life cycle inventory analysis of spent alkaline batteries treatmentPublication . Xará, S. M.; Almeida, M. F.; Silva, M.; Costa, C. A. V.
- Polymer inclusion membranes (PIMs) as an alternative for on-line solid phase extraction (SPE) in flow analysisPublication . Ribas, Tânia C. F.; Croft, Charles F.; Mesquita, Raquel B. R.; Almeida, M. Inês G. S.; Kolev, Spas D.; Rangel, António O. S. S.
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