Browsing by Author "Miranda, Diogo"
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- Impacto da mineração de lítio na saúde: resultados preliminares do projeto ILiFOODPublication . Jesus, Susana; Ventura, Marta; Miranda, Diogo; Delgado, Inês; Rego, Andreia; Gueifão, Sandra; Ribeiro, Mariana; Assunção, Ricardo; Castanheira, Isabel; Neves, Orquídia; Coelho, InêsA atividade mineira para exploração de lítio está em expansão devido à utilização de lítio em baterias de produtos eletrónicos ou veículos elétricos. Os níveis de lítio nas águas, solos e alimentos em diferentes regiões geográficas são variáveis, especialmente nas zonas próximas de explorações de lítio. O projeto exploratório ILiFOOD tem como objetivo avaliar o impacto da mineração de lítio nas explorações agrícolas/hortas familiares de locais circundantes e na ingestão alimentar das populações. A investigação contribuirá para avaliar o risco de exposição das populações locais ao lítio, e a outros elementos químicos, com base nos seus níveis em vegetais (couves e batatas) e em águas (de rega e de consumo) e solos provenientes de zonas rurais próximas e afastadas de minas ativas com recursos de lítio, localizadas nas regiões de Barroso- -Alvão e Guarda. Para estimar a exposição da população, serão aplica dos inquéritos sociodemográficos e de consumo alimentar aos residentes dos locais em estudo. Trata-se de um estudo inovador em Portugal que irá, pela primeira vez, explorar a relação entre a exposição ali mentar e a atividade mineira da exploração de recursos litiníferos. Os resultados preliminares obtidos na envolvente da mina C57 (Guarda) revelaram teores mais elevados de Li nas couves amostradas nas hortas localizadas até 0,5 km de distância da mina.
- Lithium levels in irrigation water, cabbages and potatoes from farms surrounding the C-57 mine (Gonçalo, Portugal)Publication . Jesus, Susana; Delgado, Inês; Miranda, Diogo; Ventura, Marta; Rego, Andreia; Gueifão, Sandra; Ribeiro, Mariana; Neves, Orquídea; Coelho, InêsIntroduction: Lithium (Li) is a Critical Raw Material used in modern technology, including green energy storage technology. Its growing uses led to an increased exploration of Li's sources. Li levels in soils, waters, and foods vary depending on environmental factors and soil characteristics. This fact becomes more evident near mines with Li mineral resources. Portugal has active and prospective Li mining concessions. Aims: This study investigates the potential effects of Li pegmatite exploitation at the C-57 mine (Gonçalo region, Portugal) on the crops grown in nearby subsistence farms (cabbages and potatoes) and irrigation water. The sampling locations were selected based on their proximity to the mine, with some located within 1.5 km (L1) and others ranging between 2 to 8.5 km (L2) from the mine. Methodology: The sampling plan involved selecting nine subsistence farms from two locations (L1 and L2). Three cabbages and three potatoes were collected from each farm (n=54) and analyzed as laboratory pools (n=18). Irrigation water samples were also collected in each location. The analytical procedures followed the ISO/IEC 17025:2017 standard, and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to determine Li concentration in samples. Results were expressed as the average of three replicates in µg/kg fresh weight for cabbages leaves and peeled potatoes and µg/L for water samples. Results and Conclusions: This preliminary study revealed higher Li concentration in most samples collected in L1 compared to L2. Additionally, it was observed that, in both locals, the concentration of Li in cabbages (L1: 44 – 1022 µg/kg; L2: 41 – 509 µg/kg) is higher than in potatoes (L1: 4-17 µg/kg; L2: 3-6 µg/kg), and low Li variability in irrigation waters (L1: 6-24 µg/L; L2: 2-17 µg/L). These findings demonstrate the impact of the proximity and exploitation of a hard-rock quartz-feldspath- lithium mineral resource.
- Lithium occurrence in food produced in the surroundings of the C-57 minePublication . Ventura, Marta; Jesus, Susana; Miranda, Diogo; Delgado, Inês; Rego, Andreia; Gueifão, Sandra; Ribeiro, Mariana; Neves, Orquídea; Coelho, InêsThe interest in lithium (Li) has grown over the last decades, mainly due to its application in electronic products and electric vehicles (2020, Kaunda). Li is not considered an essential nutrient for vital functions, and at high levels could be toxic to humans (2021, Bolan). Portugal is a country with active and prospective Li mining concessions. This pioneering study aims to evaluate the Li contents in cabbages and irrigation water in rural areas near the C-57 Li pegmatite mine in Gonçalo (Guarda district, Portugal). The distance between the sampling locations and the mine classified them as near (up to 1,5 km, L1) or far (between 2 and 8,5 km, L2) to the mine. Twelve subsistence farms constituted the sampling plan in both locations. Three cabbages were collected in each farm (n=72) and analysed as a laboratory pool (n=24); water samples were also collected at each location. Li amounts in the selected samples were determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), and cabbage analysis was preceded by microwave-closed vessel acid digestion. Analytical procedures were conducted following the quality assurance requirements described in the ISO/IEC 17025:2017 standard. The Li concentration in each location was expressed, as the average of three replicates, in μg/kg of fresh weight for cabbages and μg/l for water. The results from L1 are, on average, higher than those found in L2. On cabbage samples, the Li ranged from 44.4 ± 0.7 μg/kg to 1626 ± 32 μg/kg μg/kg in L1 and from 33 ± 1 μg/kg to 509 ± 19 μg/kg in L2; on irrigation water the Li levels ranged from 6.1 ± 0.1 μg/l to 36.6 ± 0.4 μg/l in L1 and from 2.40 ± 0.04 μg/l to 16.7 ± 0.4 μg/l in L2. The results show the influence of the geogenic lithium resource proximity.