Metals and Arsenic in Water Supply for Riverine Communities Affected by the Largest Environmental Disaster in Brazil: The Dam Collapse on Doce River

Carvalho, Gabriel Oliveira de; Pinheiro, A.; Menezes-Sousa, Dhoone; Padilha, Janeide de A.; Souza, Juliana Silva; Galvão, Petrus; Paiva, Thaís de Castro; Freire, Aline Soares; Santelli, Ricardo Erthal; Malm, Olaf; Torres, João Paulo Machado

doi:10.17807/orbital.v10i4.1081

Cited by 13 publications

(15 citation statements)

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“…The assessment of water and sediment conditions throughout the watershed suggest that the parametres analysed were similar to those recorded before the collapse of the Fundão Dam (Fundação Renova, 2018;de Carvalho et al, 2018). However, this does not necessarily mean that the water exhibits good quality, since they have been affected by non-point sources, including areas for agriculture, livestock and commercial 10 The Integrated Water Resources Plan for the Rio Doce watershed (ANA, 2013) describes the trend and situation of the watershed in 2010: "Water quality falls outside the expected classification.…”

Section: Prefacementioning

confidence: 58%

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Source-to-sea and landscape approaches: integrating water quality and biodiversity conservation towards the restoration of the Rio Doce watershed

Brito¹,

Barbosa²,

May³

et al. 2021

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The report contextualises the current status of water quality and biodiversity in the Rio Doce watershed, providing selected data and information on the physical, chemical and biological quality of the water and an overview of the terrestrial, freshwater and marine biodiversity since the dam rupture. A review of the integrated approaches already adopted in the Rio Docerestoration actions is also provided, focusing mainly on the TTAC programmes that in some respect embody the source-to-sea and landscape approaches in their conception. The Technical Report suggests pathways toward building a combined approach to restore water quality and biodiversity in the Rio Doce watershed, taking advantage of such actions already implementedby Renova Foundation and its partners.

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Section: Prefacementioning

confidence: 58%

“…Valadares and Colatina) were examined (de Carvalho et al, 2018). The findings indicate that the water at the time of the study was unfit for agriculture or…”

Section: Prefacementioning

confidence: 99%

Source-to-sea and landscape approaches: integrating water quality and biodiversity conservation towards the restoration of the Rio Doce watershed

Brito¹,

Barbosa²,

May³

et al. 2021

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“…To this moment, few were the publications that assess the quality of the water consumed by the population of Governador Valadares and neighboring municipalities 13,15 , which hinders general results. Furthermore, there are no studies in the region previous to the disaster, which makes it impossible to state that it was responsible for the contamination profile observed 12,32 . Finally, we did not assess the exposure of pregnant women to the aluminum in food, air, kitchen utensils and hygiene items and thus we could not make sure that the metal was present only in the consumed water.…”

Section: Discussionmentioning

confidence: 99%

“…Até o momento, foram poucos os artigos publicados que tenham avaliado a qualidade da água consumida pela população de Governador Valadares e municípios vizinhos 13 , 15 , dificultando generalizar os resultados. Ademais, não há estudos pré-desastre na região, não sendo possível afirmar que ele é responsável pelo perfil de contaminação observado 12 , 32 . Por fim, não foi avaliada a exposição das gestantes ao alumínio presente na alimentação, no ar, nos utensílios de cozinha ou nos produtos de higiene, não permitindo assegurar que esse metal se encontra apenas na água consumida.…”

Section: Discussionunclassified

Factors associated with low birthweight: a case-control study in a city of Minas Gerais

et al. 2020

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OBJECTIVE: To analyze the many factors regarding socioeconomic and healthcare-related variables linked to maternal diseases and the possible impact of the environmental disaster of Mariana, given the prenatal exposure to different water sources for human consumption that were associated with low birthweight in full-term live births in the Municipal Hospital of Governador Valadares, Minas Gerais. METHODS: Case-control study, carried out with live births at the Municipal Hospital of Governador Valadares, from May 2017 to July 2018. The case group consisted of full-term live births and low birthweight, and the control group consisted of full-term live births with adequate weight, matched by gender and date of birth. For each case, two controls were selected. Data collection was performed through interviews with the puerperal women, and complementary information was obtained by analyzing the prenatal card and medical records. For data analysis, logistic regression was performed. RESULTS: The study included 65 live births from the case group and 130 from the control group. After the analysis was adjusted for other factors under study, we found that the higher risks of low birthweight are associated with the first childbirth (OR = 2.033; 95%CI = 1.047–3.948; p = 0.036), smoking during pregnancy (OR = 2.850; 95%CI = 1.013–8.021; p = 0.047) and consumption of water supplied by the municipalities affected by the tailings from the Fundão dam failure (RC = 2.444; 95%CI = 1.203–4.965; p = 0.013). CONCLUSIONS: The variables “water consumed during pregnancy,” “previous pregnancies” and “maternal smoking” were associated with low birthweight in the population studied. The importance of epidemiological studies that assess water quality and its adverse health effects is reinforced, as well as greater prenatal control of first-time pregnant women and greater support of policies against smoking, especially during pregnancy.

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“…First reported as in high concentration in the Doce River mud ( Carvalho et al., 2017 , 2018 ), iron ions are required in many biological processes as metalloprotein components and enzyme cofactors in most microorganisms. However, they may behave as toxic compounds at high concentrations ( Bruins et al., 2000 ; Porcheron et al., 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Adaption of microbial communities to the hostile environment in the Doce River after the collapse of two iron ore tailing dams

Giongo

Borges

Marconatto

et al. 2020

Heliyon

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In November 2015, two iron ore tailing dams collapsed in the city of Mariana, Brazil. The dams' collapse generated a wave of approximately 50 million m 3 of a mixture of mining waste and water. It was a major environmental tragedy in Brazilian history, which damaged rivers, and cities 660 km away in the Doce River basin until it reached the ocean coast. Shortly after the incident, several reports informed that the concentration of metals in the water was above acceptable legal limits under Brazilian laws. Here the microbial communities in samples of water, mud, foam, and rhizosphere of Eichhornia from Doce River were analyzed for 16S and 18S rRNA-based amplicon sequencing, along with microbial isolation, chemical and mineralogical analyses. Samples were collected one month and thirteen months after the collapse. Prokaryotic communities from mud shifted drastically over time (33% Bray-Curtis similarity), while water samples were more similar (63% Bray-Curtis similarity) in the same period. After 12 months, mud samples remained with high levels of heavy metals and a reduction in the diversity of microeukaryotes was detected. Amoebozoans increased in mud samples, reaching 49% of microeukaryote abundance, with Discosea and Lobosa groups being the most abundant. The microbial communities’ structure in mud samples changed adapting to the new environment condition. The characterization of microbial communities and metal-tolerant organisms from such impacted environments is essential for understanding the ecological consequences of massive anthropogenic impacts and strategies for the restoration of contaminated sites such as the Doce River.

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Metals and Arsenic in Water Supply for Riverine Communities Affected by the Largest Environmental Disaster in Brazil: The Dam Collapse on Doce River

Cited by 13 publications

References 0 publications

Source-to-sea and landscape approaches: integrating water quality and biodiversity conservation towards the restoration of the Rio Doce watershed

Source-to-sea and landscape approaches: integrating water quality and biodiversity conservation towards the restoration of the Rio Doce watershed

Factors associated with low birthweight: a case-control study in a city of Minas Gerais

Adaption of microbial communities to the hostile environment in the Doce River after the collapse of two iron ore tailing dams

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