Encontrados 11 documentos, a visualizar página 1 de 2
Acumulação e translocação de elementos vestigiais em Cistus ladanifer L. de áre...
Abreu, M.M.; Santos, Erika; Fernandes, Eliana; Batista, Maria João; Ferreira, MaraThe accumulation and translocation of As, Cu, Pb and Zn in different Cistus ladanifer L. populations colonizing mine areas of Brancanes, Sao Domingos, Chanca and Caveira (Portuguese Iberian Pyrite Belt) and two control areas (Caldeirao and Pomarao) was evaluated. Soils from Sao Domingos and Caveira presented the greatest total concentrations of As, Cu and Pb. Brancanes and Chanca mine areas might be considered ...
Comparação de correctivos aplicados a um solo de uma área mineira contaminado c...
Madeira, A.C.; Esteves, C.; Abreu, M.M.; Varennes, A.; Magalhães, M.C.F.Three amendments (iron oxides, Fe; organic matter, MO; calcium phosphate, PCa) were applied to a naturally contaminated soil with arsenic and their effect on the growth of tomato plants and Italian parsley was studied. The results indicate differences associated with the availability of arsenic in the soil in the presence of amendments: Fe had no influence on arsenic availability compared with the unamended soi...
Avaliação biogeoquímica dos solos e do medronheiro na área mineira da Panasqueira
Godinho, B.; Abreu, M.M.; Magalhães, M.C.F.Panasqueira mine is one of the most important mines in Portugal. Over the last century exploration of tungsten, copper and tin has contributed to produce many waste materials that constitute tailings with huge dimensions generating high visual and chemical impacts. The objective of this work was to study the biogeochemical impact of mining on the soils and arbutus trees (Arbutus unedo) in this area
Disponibilidade de Cu, Pb e Zn nas áreas mineiras de Canal Caveira e São Doming...
Santos, E.S.; Abreu, M.M.; Ferreira, M.B.; Magalhães, M.C.F.Several mining areas are abandoned in the Iberian pyrite belt (IPB) leading to important points of environmental contamination. The potential and immediate environmental risk and impact on public health of hazardous elements from soil can be estimated from availability analysis. The aim of this study was to evaluate the availability of Cu, Pb and Zn in São Domingos and Canal Caveira mining areas located in the ...
Evaluation of amendments in the rehabilitation of sulfide mine tailings from Sã...
Abreu, M.M.; Varennes, A.; Santos, E.S.; Macias, F.RAMIRAN International Conference ; The São Domingos mining area is located in the Iberian Pyrite Belt, SE Portugal, and represents a serious environmental hazard (Matos and Martins, 2006). Exploitation dated back to pre-roman and roman times with extraction of Ag, Au and Cu exploitation, mainly in the gossan (resulting from the ore weathering). The intense exploitation started in the middle of 19th century, bo...
Comportamentos ecofisiológicos de Cistus ladanifer L. provenientes de áreas não...
Santos, E. S.; Abreu, M. M.; Saraiva, J.; Nabais, C.Avaliou-se o comportamento das enzimas antioxidativas (catalase, peroxidase e superóxido dismutase) e as concentrações em As, Cu, Pb e Zn nas folhas de duas populações de Cistus ladanifer colhidas em solos não contaminados em elementos vestigiais (Caldeirão e Pomarão), com condições climáticas diferentes e duas estações do ano (Primavera e Verão). Nas duas áreas, as concentrações totais e disponíveis (extracção...
Potential use of Erica andevalensis and Erica australis in phytoremediation of ...
Abreu, M.M.; Tavares, M.T.; Batista, M.J.The area around the São Domingos copper mine (Iberian Pyrite Belt) is subject of great environmental concern as acid mine water occurs several kilometres downstream of the mine. In addition thousands of tons of mine waste are present. Erica australis and Erica andevalensis, which are two spontaneous plant species of this area, have been studied with regard to their potential for phytostabilization. Soils and pl...
Uptake of uranium by lettuce (Lactuca sativa L.) in natural uranium contaminate...
Neves, O.; Abreu, M.M.; Vicente, E.M.Uranium mining activity in Cunha Baixa (Portugal) village has left a legacy of polluted soils and irrigation water. A controlled field experiment was conducted with lettuce (Lactuca sativa L.) in an agricultural area nearby the abandoned mine in order to evaluate uranium uptake and distribution in roots and leaves as well as ascertain levels of uranium intake by the local inhabitants from plant consuming. Two s...
Impacts on water, soil and plants from the abandoned Miguel Vacas copper mine, ...
Abreu, M.M.; Matias, M.J.; Magalhães, M.Clara F.; Basto, M.J.Soil, water and plant geochemistry was studied around the Miguel Vacas copper mine (Alentejo, SE Portugal), which stopped its exploitation and processing activities in 1991. After closure waste-rock piles remained exposed to weathering. The copper ore was mainly composed of copper phosphates and carbonates. Remediation actions were insufficient to prevent the spreading of waste-rock materials to surrounding far...
The protection of landscape as a resource. Case study - Monte da Guia Protected...
Bulcão, L.; Ribeiro, L.; Arsénio, P.; Abreu, M.M.The evolution of the concept of landscape to incorporate components like cultural and socio-economic factors, in addition to the natural and aesthetic features, influenced the perception of landscape as a resource. On the other hand, the relationships between territorial features as well as the understanding of their temporal dynamics determine the significance of these features for the quality of a landscape a...
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