45 documents found, page 1 of 5

The involuntary circular economy of (Nano) Plastics

Influence of tailings from a sulfide mine on drainage water quality, 60 years a...

The GeoMatRe project aims to find low-cost solutions for water and sediment rehabilitation using raw geomaterials, in abandoned mines of the Iberian Pyritic Belt. One of our case studies is the Caveira mine in southwestern Portugal, where large piles of mining waste, containing significant amounts of metals, record the long history of its exploitation for gold (Au) and silver (Ag). After the exhaustion of its r...

Avaliação do nível de contaminação nos sedimentos de cursos de água do Sistema ...

O presente trabalho, inserido no Projeto GeoMatRe, visa o levantamento das condições mais atualizadas no que toca aos parâmetros físico-químicos numa mina de drenagem ácida. Uma situação crítica que ocorre na área mineira de Caveira, em Grândola, Portugal, abandonada desde a década de 60 do século passado. O objetivo passa por analisar as condições de contaminação de Elementos Potencialmente Tóxicos (EPT) nos s...

Global citizenship in education: Challenges and opportunities for social transf...

This article addresses the theme of Global Citizenship in Education, focusing on the challenges and opportunities for promoting social transformation and sustainability. The research problem revolves around understanding how the formation of global citizens can contribute to societal transformation and the promotion of sustainable practices. The methodology adopted was a case study at the António Arroio Artisti...

Determinants for breakfast consumption among U.Porto students

A multimedia character-centric approach for history educational purposes

A historical narrative can be presented in various ways. This paper presents a multimedia-based educational mobile tool based on character-centered content presentation, with geographical points serving as the backdrop within a specific geographical and temporal context. This approach encompasses multiple fields of study, such as history and geography, introducing a computational model that explores the history...

Influência dos rejeitos de uma mina de sulfuretos na qualidade da água de drena...

The GeoMatRe project aims to find low-cost solutions for water and sediment rehabilitation using raw geomaterials, in abandoned mines of the Iberian Pyritic Belt. One of our case studies is the Caveira mine in southwestern Portugal, where large piles of mining waste, containing significant amounts of metals, record the long history of its exploitation for Au and Ag. After the exhaustion of its reserves, the ext...

Observação do nível de contaminação nos sedimentos de cursos de água do Sistema...

Following the present work inserted in the GeoMatRe Project, an ongoing project funded by Fundação La Caixa, the conditions of the most updated physical and chemical parameters of an Acid Mine Drainage are analysed, a critical situation which occurs in the mining area of Caveira (Grândola, Portugal), abandoned since the 60’s. It is intended, within the scope of the project, to observe the conditions of contamin...

The impact of economic globalization welfare states

The literature has yet to draw firm conclusions regarding the effect of economic globalization on government spending in developing countries in general and Pakistan in particular. This paper tries to overcome this gap on the literature and analyses the impact of globalization and democracy on the aggregate level of Pakistan's social spending from 1972 to 2018. The methods used include econometrics models. The ...

Effects of different disinfection treatments on the natural microbiota of lettuce

Made available in DSpace on 2022-04-28T19:56:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-09-01; In this study, water and eight sanitizing solutions (vinegar at 6, 25, and 50%; acetic acid at 2 and 4%; peracetic acid at 80 ppm, sodium hypochlorite at 200 ppm, and sodium dichloroisocyanurate at 200 ppm) were compared in terms of their effectiveness against the natural microbiota of lettuce. All of t...