OHMi Estarreja

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  - L'OHMI - Estarreja a été créé pour étudier les multiples effets de l'activité industrielle dans la municipalité d'Estarreja, et pour contribuer à l'amélioration de la connaissance de ses effets et évaluer les progrès résultants des interventions d'atténuation déjà développées dans la région.
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  - L'OHM Estarreja étudie les multiples effets de l’activité industrielle développée sur la commune d’Estarreja, dans le but d’améliorer les connaissances sur ces effets, mais aussi d'évaluer l’évolution découlant des interventions de réhabilitation déjà entreprises dans cette zone.
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Mots-clés	POTENTIAL RISKS

Porteur	Session	Titre	Mots-clés	Résumé	OHM(s)
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Anabela Cachada	2020	SSTemWater – Sources and Short-term TEMporal evolution of GroundWATER contamination in Estarreja region	Volatile Organic Contaminants Potentially Toxic Elements Potential risks Soil saturated layer Contamination hotspots	The Estarreja Chemical Complex (ECC), composed essentially by chemical plants that produce, among others, aniline, nitrobenzene, PVC, isocyanide polymers of aromatic base and polystyrene polymers for thermal isolation, has been pointed as a major threat to the environment and to public health in the region. For decades, the different ECC industries disposed off solid wastes directly on the permeable sands without containment, and untreated liquid effluents were discharged directly on streams connected to the coastal lagoon. Due to the geological features (unconsolidated detritic sedimentary rocks) of this region, that allows the contaminant’s dispersion, there is a high vulnerability of the aquifer to environmental hazards. Although waste management practices improved significantly in the last years, there are still signs of groundwater contamination. Indeed, previous studies indicate that the ECC is a vulnerable area due to the presence of multiple pressures (agriculture, industry and urban activities) and hotspots of organic and inorganic contaminants were already identified. However, there is a space-temporal variation of these hotspots that was not yet fully understood and it is not clear yet how contaminants are reaching the aquifer. Thus, this project aims at understand the dynamics behind the groundwater contamination and the processes that result in specific hotspots, and consequently identify sources and pathways of contaminants. Moreover, since some of the contaminants previously identified are classified as carcinogenic and highly toxic, the potential risks to the environment and human health will be also evaluated.	OHM Estarreja		Afficher
Anabela Cachada	2019	@10 years - Ten years of OHM: data compilation for a holistic environmental and human health risk assessment	CONTAMINATION POTENTIAL RISKS DATA COLLECTION RISK ASSESSMENT ANALYSIS	Estarreja is known for its chemical complex, and several studies were performed in the region to evaluate the presence of contaminants in environmental matrices. Some hotspots of contamination were identified, nevertheless, the real dimension of the problem, i.e. the spatial distribution of organic and inorganic contaminants and the potential risks to the environment and human health, is not well understood. Indeed, despite decades of research and almost ten years after the OHM-Estarreja creation, it is still not clear if we are dealing with a contamination or with a real pollution problem. The reason why this issue was not yet clarified is related with the complexity of the problem (several matrices, types of contaminants and land uses; legacy of the past vs recent contamination) and because most of the studies are focused on a specific question and the data are scattered. In this context, a risk assessment analysis, is the best available tool to clearly understand the problem and to identify knowledge gaps. Thus, this study aims at collect and integrate existing data to understand the spatial distribution of contaminants, identify areas and contaminants of concern, the receptors and the ecosystem services at risk. As a final output it is intended to obtain a conceptual model that will support decisions regarding the management of this area as well as implementation of an analysis, monitoring or a remediation program. This will contribute for focusing the management of future OHM funds for achieving the ambitious goal of mitigating Estarreja environmental legacy.	OHM Estarreja		Afficher

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