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Carlos Frankl Sperber - One of the best experts on this subject based on the ideXlab platform.
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impacts of the samarco Tailing Dam collapse on metals and arsenic concentration in freshwater fish muscle from doce river southeastern brazil
Integrated Environmental Assessment and Management, 2020Co-Authors: Frederico Fernandes Ferreira, Mariella Bontempo Freitas, Neucir Szinwelski, Natallia Vicente, Laila Carine Campos Medeiros, Carlos Ernesto Goncalves Reynaud Schaefer, Jorge Abdala Dergam, Carlos Frankl SperberAbstract:On November 2015, Samarco Tailings Dam in Mariana, Minas Gerais, Brazil, collapsed, releasing 62 million tons of Tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although the collapse was the worst environmental disaster in Brazil, little is known about its consequences to aquatic biota. Here we evaluate the effects of the Tailings mudflow on metal and As concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn in fish muscle tissue using inductively coupled plasma mass spectrometry (ICP-MS) in 255 individuals (34 species) sampled in unaffected and affected areas along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant Tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The Tailings mudflow increased water conductivity, and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the Tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the Fe ore Tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River. Integr Environ Assess Manag 2020;16:622-630. © 2020 SETAC.
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impacts of the samarco Tailing Dam collapse on metals and arsenic concentration in freshwater fish muscle from doce river southeastern brazil
bioRxiv, 2020Co-Authors: Frederico Fernandes Ferreira, Mariella Bontempo Freitas, Neucir Szinwelski, Natallia Vicente, Laila Carine Campos Medeiros, Carlos Ernesto Goncalves Reynaud Schaefer, Jorge Abdala Dergam, Carlos Frankl SperberAbstract:On November 2015, Samarco Tailings Dam in Mariana MG, Brazil, collapsed, releasing 62 million tons of Tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although being the worst environmental disaster in Brazil, little is known about consequences to aquatic biota. Here we evaluate the effects of the Tailings mudflow on metal and arsenic concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn in fish muscle tissue using ICP-MS in 255 individuals (34 species) sampled in unaffected and affected along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant Tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The Tailings mudflow increased water conductivity and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the Tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the iron ore Tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River.
Caio Vinicius Gabrig Turbay Rangel - One of the best experts on this subject based on the ideXlab platform.
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trace metals in rio doce sediments before and after the collapse of the fundao iron ore Tailing Dam southeastern brazil
Chemosphere, 2021Co-Authors: Eduardo Baudson Duarte, Mirna Aparecida Neves, Fabricia Benda De Oliveira, Marx Engel Martins, Carlos Henrique Rodrigues De Oliveira, Diego Lang Burak, M T D Orlando, Caio Vinicius Gabrig Turbay RangelAbstract:Abstract The collapse of the Fundao Dam, in Southeastern Brazil, caused about 50 million m³ of iron ore Tailings to sluice down the mountain to Rio Doce, in what is considered the greatest environmental disaster in Brazilian history. The fluvial system received an intense and sudden mudflow that was transported for more than 650 km, before reaching the Atlantic Ocean. Because the area was already impacted by the mineral activities in the region, it becomes essential to evaluate the environmental conditions before the disaster to correctly assess the disaster real Damage. This study compares the concentration of trace metals in the sediments of the Rio Doce alluvial plain, before and after the Dam collapse, as well as the newly deposited iron ore Tailings that became part of the sedimentary framework. The data indicate that the fine particles deposited have since been incorporated into the sandy river sediments. The cadmium and arsenic contents in the sediments increased to levels above the National Environment Council thresholds. The comparison between the levels of trace metals in the situations before and after disaster shows that the mining mud is the source of cadmium while the arsenic was present before the environmental disaster, and its concentration increased due to sediment remobilization. The iron ore Tailings deposited on the alluvial sediments also affected the physical parameters since the formed ferruginous crusts waterproofed the ground surface and may, gradually, release toxic metals when exposed to weathering and river reworking.
Emmanoel V Silvafilho - One of the best experts on this subject based on the ideXlab platform.
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ecotoxicological assessment after the world s largest Tailing Dam collapse fundao Dam mariana brazil effects on oribatid mites
Environmental Geochemistry and Health, 2020Co-Authors: Andressa Cristhy Buch, Klaus Dieter Sautter, Eduardo Duarte Marques, Emmanoel V SilvafilhoAbstract:Worldwide, environmental tragedies involving mining Dam ruptures have become more frequent. As occurred a few years ago in Brazil (on 5 November 2015, in Minas Gerais state) the Fundao Dam rupture released 60 million m3 of Tailings into terrestrial and aquatic ecosystems. Since then, little information on the ecotoxicity of these Tailings has been disclosed. In the laboratory, the acute, chronic and bioaccumulation effects of increased Fundao Tailing concentrations on oribatid mites (Scheloribates praeincisus) were assessed. Additionally, the bioaccumulation of 11 trace metals (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn) and the total density of oribatid mites found in the areas contaminated by the Fundao Tailings were determined. The percentages of mite survival and reproductive inhibition were higher than 60% and 80%, respectively, in all contaminated areas with the highest concentration (100% mine Tailings). Field studies showed an expressive reduction in the total density of oribatids per m−2 (up to 54 times) in the contaminated areas compared with the reference area. Metal accumulations in the field were 5.4 and 3.2 higher (for Ni and Hg, respectively) and up to two times higher (for most metals) than those in the laboratory for 42 days. The mite responses to the Fundao Tailings found in this study suggest long-term interference in their biological development. In this sense, we can conclude that the introduction of mine Tailings onto soils tended to compromise the functionality of the mites in the ecosystem, which causes imbalances to cascade other organisms of the trophic web.
Frederico Fernandes Ferreira - One of the best experts on this subject based on the ideXlab platform.
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impacts of the samarco Tailing Dam collapse on metals and arsenic concentration in freshwater fish muscle from doce river southeastern brazil
Integrated Environmental Assessment and Management, 2020Co-Authors: Frederico Fernandes Ferreira, Mariella Bontempo Freitas, Neucir Szinwelski, Natallia Vicente, Laila Carine Campos Medeiros, Carlos Ernesto Goncalves Reynaud Schaefer, Jorge Abdala Dergam, Carlos Frankl SperberAbstract:On November 2015, Samarco Tailings Dam in Mariana, Minas Gerais, Brazil, collapsed, releasing 62 million tons of Tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although the collapse was the worst environmental disaster in Brazil, little is known about its consequences to aquatic biota. Here we evaluate the effects of the Tailings mudflow on metal and As concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn in fish muscle tissue using inductively coupled plasma mass spectrometry (ICP-MS) in 255 individuals (34 species) sampled in unaffected and affected areas along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant Tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The Tailings mudflow increased water conductivity, and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the Tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the Fe ore Tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River. Integr Environ Assess Manag 2020;16:622-630. © 2020 SETAC.
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impacts of the samarco Tailing Dam collapse on metals and arsenic concentration in freshwater fish muscle from doce river southeastern brazil
bioRxiv, 2020Co-Authors: Frederico Fernandes Ferreira, Mariella Bontempo Freitas, Neucir Szinwelski, Natallia Vicente, Laila Carine Campos Medeiros, Carlos Ernesto Goncalves Reynaud Schaefer, Jorge Abdala Dergam, Carlos Frankl SperberAbstract:On November 2015, Samarco Tailings Dam in Mariana MG, Brazil, collapsed, releasing 62 million tons of Tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although being the worst environmental disaster in Brazil, little is known about consequences to aquatic biota. Here we evaluate the effects of the Tailings mudflow on metal and arsenic concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn in fish muscle tissue using ICP-MS in 255 individuals (34 species) sampled in unaffected and affected along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant Tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The Tailings mudflow increased water conductivity and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the Tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the iron ore Tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River.
Eduardo Baudson Duarte - One of the best experts on this subject based on the ideXlab platform.
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trace metals in rio doce sediments before and after the collapse of the fundao iron ore Tailing Dam southeastern brazil
Chemosphere, 2021Co-Authors: Eduardo Baudson Duarte, Mirna Aparecida Neves, Fabricia Benda De Oliveira, Marx Engel Martins, Carlos Henrique Rodrigues De Oliveira, Diego Lang Burak, M T D Orlando, Caio Vinicius Gabrig Turbay RangelAbstract:Abstract The collapse of the Fundao Dam, in Southeastern Brazil, caused about 50 million m³ of iron ore Tailings to sluice down the mountain to Rio Doce, in what is considered the greatest environmental disaster in Brazilian history. The fluvial system received an intense and sudden mudflow that was transported for more than 650 km, before reaching the Atlantic Ocean. Because the area was already impacted by the mineral activities in the region, it becomes essential to evaluate the environmental conditions before the disaster to correctly assess the disaster real Damage. This study compares the concentration of trace metals in the sediments of the Rio Doce alluvial plain, before and after the Dam collapse, as well as the newly deposited iron ore Tailings that became part of the sedimentary framework. The data indicate that the fine particles deposited have since been incorporated into the sandy river sediments. The cadmium and arsenic contents in the sediments increased to levels above the National Environment Council thresholds. The comparison between the levels of trace metals in the situations before and after disaster shows that the mining mud is the source of cadmium while the arsenic was present before the environmental disaster, and its concentration increased due to sediment remobilization. The iron ore Tailings deposited on the alluvial sediments also affected the physical parameters since the formed ferruginous crusts waterproofed the ground surface and may, gradually, release toxic metals when exposed to weathering and river reworking.
