Resumo:

Human activities such as industry and agriculture have resulted in the high contamination of soil and water with heavy metals. This type of contamination induces harmful effects on environmental and human health. In the last years, research on phytoremediation has highlighted the scientific and economic benefits of plants and their associated microorganisms used for the reclamation of polluted soil and water. Also, the potential of microorganisms to enhance phytoremediation processes and the exact mechanism by which bacteria could enhance heavy metal accumulation in plants has been received some attention. Despite the great interest in improving the efficiency of metal hyperaccumulating plants, their influence on microbial community’s remains poorly elucidated, constituting a less explored aspect in phytoremediation processes. The aim of this study is to investigate the impact of the plant hyperaccumulator (Thlaspi spp.) on the diversity and structure of soil bacterial communities during phytoextraction processes. The present study aimed to assess the impact of the Thlaspy spp. on the bacterial communities along phytoremediation process in Cd and Pb-contaminated soil from Estarreja region. Results will contribute to establish efficient strategies of risk assessment and phytorremediation in Estarreja.

Resumo:

Dans le cadre du groupe de travail IDS “Infrastructures de Données Spatiales” du Labex DRIIHM, plusieurs axes de travail ont été engagés en novembre 2015, dont celui sur la création d’outils de type photothèques ou vidéothèques. Étant donné les différents états d’avancement selon les OHM, ce projet vise à proposer un atelier de formation sur 3 jours afin de former les participants à l’indexation des images et à la création d’un entrepôt OAI-PMH standardisé (Open Archives Initiative Protocol for Metadata Harvesting) qui permet de rendre les métadonnées de ces images accessibles à tout client “moissonneur”, par exemple un géocatalogue ou un moteur de recherche. Le troisième jour de formation (optionnel) est dédié spécifiquement à la formation au logiciel de photothèque Piwigo connecté à l’entrepôt OAI-PMH afin de proposer une solution logicielle complète et prête à l’emploi.

Resumo:

Instalado no início dos anos 50 do século XX o Complexo Químico de Estarreja (CQE) compreende atualmente cinco empresas localizadas nas freguesias de Avanca (1) e Beduído (4), do Concelho de Estarreja. A implantação do CQE implicou mudanças profundas e contribuiu, ao longo do tempo, para a reconfiguração do território a nível social, demográfico, económico e cultural. No início dos anos 50, Estarreja, à semelhança de uma boa parte do território do país, era um concelho marcadamente rural e assente na atividade agrícola. Este cenário alterou-se substancialmente ao longo dos últimos 60 anos, com a entrada em funcionamento e o desenvolvimento do CQE, aliado a uma ampla transferência da população ativa no setor primário para o setor secundário. Esta transferência não implicou, porém, o fim da agricultura no concelho, atividade que se mantém até aos dias de hoje, representando cerca de 54% do uso do solo e dominando a paisagem local. No entanto, a agricultura é hoje uma atividade complementar, orientada para o autoconsumo familiar, uma atividade largamente de subsistência mas ainda relevante enquanto geradora de rendimentos adicionais para os agregados domésticos e de ocupação do tempo (designadamente do tempo livre) das populações locais. A instalação do CQE não se fez sem induzir transformações reais ou potenciais a nível ambiental e sem colocar riscos relevantes para as populações e ecossistemas locais. Trata-se de um Complexo que integra estabelecimentos industriais que, ao abrigo da legislação em vigor, possuem grandes quantidades de substâncias de grande perigosidade e que configuram riscos de acidentes industriais graves.

Resumo:

Given the rising environmental awareness scientist from all over the world highlight that water quality is essential for a healthy development of aquatic ecosystems and humans. The analysis of the human‐environment interaction process and their evolution are among the OHM main goals. Therefore, the permanent monitoring of heavy metals released into natural water bodies by industrial wastewater discharges in water, surrounding the OHM sites, has become essential.

This project aims to improve the water quality control by a real time wireless monitoring of the metals inputs (Hg, Cr and Cd) into the water body. A smart sensor wireless network system will be developed and used to monitor and predict the risk of water contamination by such hazardous substances, which have very harmful effects on human health and environment, including loss of biodiversity of aquatic ecosystems, even at extremely low concentrations, due to their high toxicity. The Estarreja Municipality lagoon, an important source of irrigation waters for the region, will be monitored and the results will allow the understanding of the Estarreja Chemical Industrial Complex influence on the surrounding ecosystems.

Resumo:

Chronic Obstructive Lung Disease (COPD) is an inflammatory disease characterized by progressive airflow obstruction and destruction of lung parenchyma that was the fifth most common cause of death worldwide in 2001, and that it expected to rise to 3rd place by 2030. Whereas tobacco smoking is regarded as the principal risk factor for the development of COPD, 25–45% of patients with COPD have never smoked.

Furthermore, recent studies showed that exposure to other environmental contaminants plays an important role in this disease, particularly in intensive and frequent exposure scenarios, such as occupational and indoor exposures. Thus, studies on the association between COPD and other risk factors are essential. In this line of thought several studies on the association of COPD and occupational exposures have been performed over the last years. However, household and indoor exposures did not receive the same degree of attention by the scientific community, even though most people tend to spend the vast majority of their time indoors (about 80%) and that 2/3 of that time is spent at home.Hence, studies on the distribution of environmental contaminants in the indoor environment alongside with studies on the levels of those contaminants in human samples are of great importance. With this project, levels of selected environmental contaminants (metals and organometals) will be assessed in environmental and biological samples obtained from volunteers (with and without COPD), their households and whenever possible their surroundings in order to unravel possible associations.

Our ultimate goal is to identify risks factors for the development and progression of COPD and ultimately to promote health.

Resumo:

OHM territories are concerned by present and past pollutions. Especially potentially harmful trace elements or trace metals (here called PHTE) could have been released through industrial and mining activities in OHM watersheds. Previous OHM projects have shown that human activities have released different PHTE in the watersheds of the OHMs Haut-Vicdessos and Estarreja. For example Pb was dispersed in the environment since the Antiquity and especially during the Middle Ages in the High Vicdessos area. In Estarreja, anthropogenic arsenic and mercury are found in soils and sediments (Inácio et al.,2014).

Unlike in the OHM-Haut Vicdessos, in the other OHM territories, the presence of well-preserved peat and lake records is not clear but the presence of wetlands with organic sediment accumulation is testified. This is the case of the OHM Estarreja with riverbanks and lagoons present in the complex lagoon system draining into the Ria.

Wetlands such as the ones of Estarreja and Haut Vicdessos are intrinsically linked to hydrology, which creates particular physico-chemical conditions that make them different from well-drained terrestrial or fully aquatic deepwater systems. Moreover, the ecological consequences of environmental changes in the watershed are largely dependent on changes in the hydrological regime (such as sea level rise, decreased surface area and fluctuations of ground water levels), as well as on water quality. Therefore, knowledge of background fluxes and concentrations of PHTE are of primordial importance to understand present concentrations and transfers of anthropogenic PHTE. But these transfers of PHTE are also conditioned by more extreme events such as hydrological transfers like floods or droughts that will have a huge impact on the PHTE concentrations released from the soils to the watersheds. It is well known that wetlands exposed to environmental contamination act as sink and sources of PHTE. Soil particles may act as important transporters of environmental pollutants due to the chemical-physical processes that PHTE undergo during cycles of transport and temporary deposition. Thus, the soil-sediment-water system is evolving now as it was in the past. To understand the biogeochemical cycling of the PHTE is therefore crucial for purpose of environmental risk assessment, for retro-observation analysis or for prediction of natural hazards.

But these types of wetlands can provide important archives of past environmental, climate, hydrologic and vegetation changes, For instance, studying the trace elemental composition or isotopic signatures of trace elements within a fish otolith gives insight to the water bodies fish have previously occupied. Climate changes and environmental stresses can be assessed through an understanding of changes in tree growth. Generally, trees respond to changes in environmental variables by speeding up or slowing down growth, which in turn is generally, reflected a greater or lesser thickness in growth rings. Different species, however, respond to changes in environmental variables in different ways.

Given the importance of such an important type of terrestrial environment, we are developing in the High Vicdessos area an innovative approach combining different high resolution environmental archives of past pollution in the watershed: peat and lake records. Whereas peat records are used as archives of pure atmospheric signals, lake sediments record signals from both the atmosphere and the catchment. Combining both archives allow us to decipher the origin of the metals and also the potential lag between atmospheric deposition and transfer to the watershed.

Another major advantage is that this approach gives us insights also on preindustrial and, if old enough, on prehistoric levels of pollution.

There is thus a need to develop new integrative tools and improve the existent ones to understand recent biogeochemical transfers in the critical zone of the territories of the OHM. For that purpose, annual environmental archives like fish otoliths and tree rings can be used to understand recent transfers of PHTE in the environment.

Resumo:

This project aims at assessing the accumulation of Hg (mercury) by woman living in the Aveiro district, and the potential maternal-fetal transfer during pregnancy. In addition to Hg measurements, related oxidative stress, neurotoxicity and DNA damage effects will be evaluated in both mother and baby tissues and blood. Although some epidemiological studies have already related Hg accumulation in several matrices regarding maternal-fetal transfer, only few studies have regarded this approach in Portugal, and none for the Aveiro district (which includes Estarreja). In addition, only few epidemiological studies have focused on genotoxicity to evaluate Hg exposure in humans. Therefore integrating biomarkers of exposure (Hg measures in maternal and fetal matrices) along with biomarkers of effects (e.g. oxidative stress and DNA damage) will improve the knowledge on the historical problem of Hg contamination in Aveiro region, along with the potential action from local authorities if results show concern to human health.

Resumo:

Environmental matrices such as soils, plants, superficial waters and aquatic organisms can be an indicator of the environmental pollution since they could contain high levels of organic pollutants (OPs) influencing the environment quality and consequently human health. OPs are resistant to degradation and can persist for long times in the environment. These compounds can be transported by wind for long distances and can also easily enter the food chain. People are exposed to OPs by ingestion, inhalation and dermal uptake, causing adverse effects in human health due to their carcinogenic and mutagenic nature. The exposure risks to ecosystems and human health will be assessed and monitored on some environmental matrices presents in Estarreja, a very important industrial zone. OPs bioavailability will be assessed and quantified through chemical extractions. Bioacessibility tests will be performed in order to infer about the OPs concentrations that can beincorporated by plants and organisms and eventually reach humans. This study aims to contribute to a better insight on the behaviour of OPs in the ecosystems dynamics and infer about the real human exposure risks. This research work will improve current scientific knowledge about the possible existent contamination by the several OPs, risk assessment and environmental quality of Estarreja area. Assessment of the bioavailability of pollutants and human health risks will be performed through: chemical extractions and also bioaccumulation, bioaccessibility and ecotoxicological studies. It will give us new data about toxicity and bioavailability of present OPs. The main focuses are: 1. Analysis of the contamination levels presents in some environmental matrices (soil, plants, superficial waters and aquatic organisms) in Estarreja area; 2. Evaluation of contaminants bioavailability and bioaccumulation levels by using chemical extraction procedures and by evaluating the accumulation of OPs in plants and aquatic organisms; 3. Quantification of OPs bioaccessibility, namely through physiologically based extraction tests on soil, plants, superficial waters and aquatic organisms; 4. Integration of the obtained results in order toassess risks for human health by describing the contamination levels with OPs and their availability to be up taken by humans; at the end, soil and water quality will be linked to the global ecosystem health. 5. Contribute to define criteria for OPs contamination accepted levels based on potential health risks to humans and define protection strategies for this type of contamination.

Resumo:

The present project intends to contribute to the knowledge of chemical composition (organic and inorganic) of rainwater in the city of Estarreja, identifying the major pollutants in the area, including tracers of anthropogenic activities. Thus, two distinct sampling locals will be used to evaluate the sources of pollution: one in the industrial area (industrial); and another out of industrial area, and near an agricultural area (industrial background/agricultural). The influence of seasonality (with sampling in two distinct periods: warm and cold seasons) and of air masses trajectories on the chemical composition of rainwater will be also assessed. Moreover, will be evaluated the implications of the presence of contaminants in rainwater to the environment and to the human beings, since rainwater is a way of availability of freshwater. The project involves a multidisciplinary team, with researchers from the Departments of Chemistry and Geosciences at University of Aveiro, with wide experience in assessment of organic and inorganic contamination in environmental matrices, including in rainwater. This project is in the scope of "the OHM International Estarreja, which aims at studying the multiple effects of the industrial activity on the man-environment relationship, taking into account the temporal dimension, marked by changes in industrial practices". Furthermore, the proposed project is within the scope of the priority areas, "Area 2: Public Health", more specifically "Organic Contaminants: agricultural origin/ industrial origin". In addition to organic contaminants the present project will also study the inorganic contaminants from agricultural and industrial origins.

Resumo:

Estarreja has always been a region with extensive farming areas, developing parallel and competing for land with an important industrial pole - the Estarreja Chemical Complex (ECC). For decades, the different ECC industries disposed solid wastes directly on the permeable sands without any kind of containment or impermeabilization, and discharged liquid effluents directly on streams connected to the coastal lagoon, without any previous treatment. Nowadays, the increasing of environmental consciousness led to an improvement of waste management practices. Although there are still signs of long term soil and groundwater contamination and the extension and persistence of contaminants are not fully understood, in part due to geological features (unconsolidated detritic sedimentary rocks) that allows the contaminant’s dispersion and cause high aquifer vulnerability.

Pore waters are very specific solutions, generally with high concentrations due to the greater residence time than percolation waters, which promote a high water-soil interaction. For this reason these solutions are the transference medium for excellence of inorganic and organic compounds between soils and plants. In this sense, the study of pore waters can give valuable information about the mobility and bioavailabitity of contaminants for plants.

In this project we propose to study the influence of the agriculture practices in the contaminants mobilization, focusing in pilot contaminated areas of Estarreja, and using pore waters as a medium to study these processes, hoping to contribute with valuable information to improve de quality of agriculture practices in the reduction of contaminant’s exposure.

Resumo:

Salt marshes are amongst the most productive ecosystems in the world and provide important ecosystem services, namely regulation and maintenance of coastal areas. Acting as coastal filters, salt marshes also have important roles in carbon (C) storage, thus contributing to climate regulation at local and global levels.

Nevertheless, these habitats have been converted or degraded due to many drivers and pressures, and its sustainability and C storage capacity might be threatened by climate change effects. As a result of global climate change and sea level rise, Baixo Vouga Lagunar (BVL) salt marshes, included in Ria de Aveiro (Portugal), are likely to be affected and, consequently, the services they provide, namely C storage.

The main goals in this project are to analyse the BVL salt marshes phytosociological trend and to assess their C storage capacity, as an ecosystem service.

Resumo:

L'ingestion est une voie majeure d'exposition aux contaminants chez les enfants en bas-age. Le projet se propose de faire une étude des caractéristiques physico-chimiques, de la bio-accessibilité et de la génotoxicité des particules ingérées par les enfants en intérieur et en extérieur dans des environnements qu'ils fréquentent régulièrement (crèches, écoles maternelles, aires de jeux). Les sites de prélèvements seront choisis, sur les territoires des trois OHM BMP, Estarreja et Litmed, en fonction de leur environnent et exposition. L'importance de la spéciation des contaminants sur leur bio-accessibilité et ses conséquences sur la santé pourra être mise en évidence.