Untitled

Brabo, Edílson da Silva; Angélica, Rômulo Simões; Silva, A. P.; Faial, Kleber Raimundo Freitas; Mascarenhas, Artur Fernando Silva; Santos, E. C. O.; Jesus, Iracina Maura de; Loureiro, Edvaldo Carlos Brito

doi:10.1023/a:1024510312250

Cited by 37 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…De acordo com Lacerda et al 3 , o mercúrio é capaz de ser mobilizado devido à oxidação da matéria orgânica do solo. Em geral, é acumulado nos solos da Amazônia tanto na camada superficial orgânica, geralmente associado com a deposição atmosférica 19,20 , quanto no horizonte mineral associado ao processo de intemperismo laterítico 12 . Segundo Schuster 32 , elevadas concentrações de Hg determinadas em horizontes orgânicos de regiões temperadas são geralmente explicadas pela forte afinidade de Hg por matéria orgânica.…”

Section: Resultsunclassified

“…Estudos em solos oxisóis-podzóis na Guiana Francesa e na região do rio Tapajós, no Estado do Pará, têm apresentado altas concentrações de mercúrio associadas a complexos organo-metálicos na fração mineral do solo 10,11 . Também na região Amazônica 12 , em alguns solos caracterizados por baixas concentrações de matéria orgânica coletados no Estado do Acre (localizados em regiões sem emissões antrópicas de Hg), foram determinados teores relativamente elevados desse metal (0,017-0,279 μg g -1 ) quando comparados com teores considerados por alguns autores como sendo basais em solos (0,140 μg g -1 ) 13 . Valle et al…”

Section: Introductionunclassified

See 1 more Smart Citation

Distribuição de mercúrio em diferentes solos da Bacia do médio Rio Negro-AM: influência da matéria orgânica no ciclo biogeoquímico do mercúrio

et al. 2007

View full text Add to dashboard Cite

Section: Resultsunclassified

Section: Introductionunclassified

Distribuição de mercúrio em diferentes solos da Bacia do médio Rio Negro-AM: influência da matéria orgânica no ciclo biogeoquímico do mercúrio

et al. 2007

View full text Add to dashboard Cite

“…However, it is similar to that found by Kütter (2006) from an industrial area in the same region ( Table 2). The Hg concentrations in SPM paddy was about 1.5 times higher than the regional background and up to 4 times higher compared to remote areas in Amazon (Brabo et al, 2003). Silva et al (2009) demonstrated that watershed land use influences Hg levels in fishes of Amazon biome.…”

Section: Mercury In the Soil And Suspended Particulate Mattermentioning

confidence: 89%

Mercury bioaccumulation in fishes of a paddy field in Southern of Brazil

Kütter

Silva-Filho

et al. 2015

Acta Limnol. Bras.

View full text Add to dashboard Cite

Aim: The aim of present study was to evaluate the Hg concentration in two species of fish (Astyanax sp and Corydoras paleatus) and its potential use as a biomonitor, in order to know if the use of pesticides and fertilizers in paddy can enhance the Hg contamination to adjacent aquatic environment.MethodsSoil, suspended particulate matter and fish samples were sampled in a paddy field in South Brazil. A cold vapor system, coupled with a GBC 932 atomic absorption spectrophotometer was used for total Hg determinations in samples.ResultsThe paddy soil shows Hg concentration 2-fold higher (mean 31 ng g-1) in comparison to background areas (not cultivated). Suspended particle matter Hg concentration in paddy channels (mean 232.5 ± 44.2 ng g–1) are 1.5 times higher than the regional background. The analyzed fish specimens Astyanax sp in paddy showed Hg concentration 4-fold higher and significant different to background area. The mean Hg concentration in fish was: 51.7 ± 19.5 ng g–1 in Astyanax sp and 156.8 ± 44.0 ng g–1 in Corydoras paleatus.ConclusionsConsidering the linear regression and Man whitney test hypothesis to Hg concentration in fish tissue from paddy suggests that Astyanax sp. can be a good biomonitor of Hg contamination, whereas Corydoras paleatus is a potential biomonitor. However, more studies with Corydoras are necessary in order to aggregate consistency to this hypothesis.

show abstract

“…Brabo et al 26 conducted a study to quantify Hg in various abiotic and biotic matrices from Acre State and Purus Rivers (both located at the west end of Western Amazonia), including fish samples from Rio Branco (the capital of Acre State), Sena Madureira, Brasiléia and Assis Brazil cities (small riverine villages located at Acre State). The results revealed that water, bottom sediments and suspended solids were in accordance with a non-impacted area and also that Hg lithogenic input is more significant than the external contribution.…”

Section: ▄ Introductionmentioning

confidence: 99%

Mercury in fish and sediment of Purus River, Acre State, Amazon

et al. 2016

View full text Add to dashboard Cite

Core subject To quantify the Hg content of sediment and fish collected along the Purus River (Acre State, Amazon) in order to identify if those samples could be a potential route of Hg exposure to the population of Manoel Urbano (a riverside community). Methods The total mercury (THg) was quantified using the Cold Vapor Atomic Absorption technique. Results We collected 06 samples of sediment and 264 samples of fish. The Hg in sediments ranged between 0.038 and 0.065 µg.g–1.The results indicate that sediment is in agreement with “uncontaminated” Amazonian rivers. The carnivorous species presented the highest level of Hg on muscle (mean 0.927 μg/g–1), followed by piscivorous (mean 0.873 μg.g–1), planktophagus (mean 0.566 μg.g–1), omnivorous (mean 0.533 μg.g–1) and detritivorous (mean 0.176 μg/g–1). Fourty four percent (44%) of the total species collected presented mean levels of THg on muscle, a percentage greater than the threshold recommended by WHO. Conclusion Some species may be a route for Hg exposure. The sediment is within the normality. The authors suggest that other factors, such as culture and society, should be considered for future researches in order to promote the population healths.

show abstract

Untitled

Cited by 37 publications

References 22 publications

Distribuição de mercúrio em diferentes solos da Bacia do médio Rio Negro-AM: influência da matéria orgânica no ciclo biogeoquímico do mercúrio

Distribuição de mercúrio em diferentes solos da Bacia do médio Rio Negro-AM: influência da matéria orgânica no ciclo biogeoquímico do mercúrio

Mercury bioaccumulation in fishes of a paddy field in Southern of Brazil

Mercury in fish and sediment of Purus River, Acre State, Amazon

Contact Info

Product

Resources

About