A5088237639- Building materials and conservation
- Mine drainage and remediation techniques
- Geochemistry and Elemental Analysis
- Cultural Heritage Materials Analysis
- Clay minerals and soil interactions
- Geological and Geophysical Studies Worldwide
- Tailings Management and Properties
- Geological and Geochemical Analysis
- Coal and Its By-products
- Heavy metals in environment
- Arsenic contamination and mitigation
- Conservation Techniques and Studies
- Therapeutic Uses of Natural Elements
- Rock Mechanics and Modeling
- Concrete and Cement Materials Research
- Paleontology and Stratigraphy of Fossils
- Radioactive element chemistry and processing
- Metal Extraction and Bioleaching
- Radioactivity and Radon Measurements
- Geology and Paleoclimatology Research
- Minerals Flotation and Separation Techniques
- Archaeological and Geological Studies
- Groundwater and Isotope Geochemistry
- Recycling and utilization of industrial and municipal waste in materials production
- Iron oxide chemistry and applications
University of Minho
2011-2024
University of Lisbon
2015
Terra
1993
Wildfires can cause serious imbalances in ecosystems, primarily at the soil level, making it vulnerable to degradation processes such as erosion. During and after a fire, changes occur properties, including pH, which affects solubility availability of nutrients. Currently, there is great diversity protocols, some involving normalized standards, determine but no consensual or universal analytical method for this parameter, especially burned soils, mineral organic fractions could have been...
Abstract Rare earth elements are mobilized, fractionated and precipitated during weathering processes of basaltic rocks the Lisbon Volcanic Complex. In general there is an increase in REE contents whole samples with increasing fractionation between LREE HREE . Cerium partially oxidized Ce 4+ retained resulting negative anomalies base middle profile zones. clay fraction from top to bottom profiles, except for Ce, giving rise positive this element profiles. Significant occur finer fractions...
Waste dumps resulting from metal exploitation create serious environmental damage, providing soil and water degradation over long distances. Phytostabilization can be used to remediate these mining sites. The present study aims evaluate the behavior of selected plant species (Erica arborea, Ulex europaeus, Agrostis delicatula, Cytisus multiflorus) that grow spontaneously in three sulfide-rich waste-dumps (Lapa Grande, Cerdeirinha, Penedono, Portugal). These sites represent different...
ABSTRACT Passive systems with constructed wetlands are designed to simulate natural attenuation processes in order treat mine water a long-term and cost-effective manner. In this way, they especially appropriate discharging from abandoned mines. This paper presents geochemical mineralogical data obtained recently passive system the Jales mine, north Portugal. It shows role of fresh ochre-precipitates, formed as waste products neutralization process, retention trace elements. Chemical...
The rare earth elements (REE) along with iron and manganese distribution in ochre-precipitates wetland soils a passive system for acid mine drainage treatment (Jales, Portugal) was studied. results obtained by instrumental neutron activation analysis showed higher incorporation of the light REE (particularly La Ce) resulting from water-limestone interaction. These fluffy materials influence entrance first where correlation between Fe Ce found. Then Mn phases appear to play more important...