Výsledky vyhledávání - "Metais pesados

Freshwater shrimps (Macrobrachium depressimanum and Macrobrachium jelskii) as biomonitors of Hg availability in the Madeira River Basin, Western Amazon

Autor: Galvão, R.C.F., Holanda, I.B.B., Carvalho, D.P. De, Almeida, R., Souza, C. M. M., Lacerda, Luiz Drude De, Bastos, W. R. Bastos

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

Total mercury (THg) concentrations mea-sured in two freshwater shrimp species( M a c ro b r a c h i u m d e p re s s i m a n u m a n d Macrobrachium jelskii ) showed a relationship withthe location of artisanal and small-scale gold min-ing (ASGM) fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::af96b2d9669cbc836223e5165fd3293b
http://www.repositorio.ufc.br/handle/riufc/65478

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Mercury accumulation rates in Caço Lake, NE Brazil during the past 20.000 years

Autor: Luiz Drude de Lacerda, A. Sifeddine, Renato Campello Cordeiro, Bruno Turcq

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC
Journal of South American Earth Sciences
Journal of South American Earth Sciences, Elsevier, 2017, 77, pp.42-50. ⟨10.1016/j.jsames.2017.04.008⟩
Journal of South American Earth Sciences, 2017, 77, pp.42-50. ⟨10.1016/j.jsames.2017.04.008⟩

Total Hg, TC, TN, goethite and siderite distributions in sediment cores from two locations across Caco Lake (Brazil) identified paleoclimate factors that had affected the Hg deposition in this shallow tropical lake and its relationship with past clim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bcd9cac167d8a656bdfbcc2944a7d8d
http://www.repositorio.ufc.br/handle/riufc/65587

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Mercury sequestration by rainforests: The influence of microclimate and different successional stag

Autor: Teixeira, Daniel C., Lacerda, Luiz Drude de, Silva-Filho, Emmanoel V.

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

Mercury (Hg) concentrations in tropical forest soils and litter are up to 10 times higher than those from temperate and boreal forests. The majority of Hg that has been stored in tropical soils, as the forest is left intact, could be trapped in deepe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::e4f252ccb617ee85f0fda68bb2fce40e
http://www.repositorio.ufc.br/handle/riufc/65584

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Autor: Bastos, Wanderley R, Dórea, José G., Bernardi, José Vicente E., Manzatto, Angelo G., Mussy, Marilia H., Lauthartte, Leidiane C., Lacerda, Luiz Drude de, Malm, Olaf

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

Sex plays an important role in the kinetics and dynamics of methylmercury in some animals. Although fish is the main source of mercury exposure to consumers, the role of sex in fish-Hg bioaccumulation is less known. We studied total Hg (THg) concentr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::9214f356673f930fe13bddb0be110e8f
http://www.repositorio.ufc.br/handle/riufc/65588

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Mercury anomaly, Deccan volcanism, and the end-Cretaceous mass extinction

Autor: Thierry Adatte, Luiz Drude de Lacerda, Jahnavi Punekar, Gerta Keller, Alcides N. Sial, Eric Font

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

The contribution of the Deccan Traps (west-central India) volcanism in the CretaceousPaleogene (KPg) crisis is still a matter of debate. Recent U-Pb dating of zircons interbedded within the Deccan lava flows indicate that the main eruptive phase (>1.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df2fa9418d087e94bac30c40dea4f581
http://www.repositorio.ufc.br/handle/riufc/65646

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Mercury enrichment and Hg isotopes in CretaceousePaleogene boundary successions: Links to volcanism and palaeoenvironmental impacts

Autor: Jiubin Chen, Manoj K. Pandit, Silvio Heriberto Peralta, Valderez P. Ferreira, Natan Silva Pereira, Claudio Gaucher, Robert Frei, José Antonio Barbosa, Luiz Drude de Lacerda, Alcides N. Sial, Vinod C. Tewari, Simonetta Cirilli, Christoph Korte

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

We investigate the use of Hg as a proxy for volcanism by studying four distal and two proximal sections in relation to the Deccan volcanic center, straddling the Cretaceous-Paleogene (KPg) boundary at (a) Højerup (Denmark), Bottaccione and Padrician

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64e3a276c886e049637eca185b176fdd
http://www.repositorio.ufc.br/handle/riufc/65585

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Biogeochemical indicators of environmental changes from 50Ka to 10Ka in a humid region of the Brazilian Amazon

Autor: Y.P. Potty, Ricardo Erthal Santelli, A. Sifeddine, B. Gueiros, S.R. Patchinelam, E.O. Pádua, Renato Campello Cordeiro, Luiz Drude de Lacerda, E.V. Silva Filho, Bruno Turcq

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

We present a geochemical record of a 113.6-cm sediment core (LPT V) from Lagoa da Pata, which is located in the forested upper Rio Negro basin. The record reveals significant changes in the environmental history of Amazonia during the late Quaternary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d4d01b66ef6a3d73a2776e69864f9db
https://doi.org/10.1016/j.palaeo.2010.11.021

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Food preferences and Hg distribution in Chelonia mydas assessed by stable isotopes

Autor: Bezerra, M.F., Lacerda, Luiz Drude de, Rezende, C.E., Franco, M.A.L., Almeida, T.T, Pires, M.G., Róstan, G., Lopez, G.G.

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

Mercury (Hg) is a highly toxic pollutant that poses in risk several marine animals, including green turtles (Chelonia mydas). Green turtles are globally endangered sea turtle species that occurs in Brazilian coastal waters as a number of life stage c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::0d7dcf69f2d7de0c0ce273b58e846239
http://www.repositorio.ufc.br/handle/riufc/65753

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Characterization of the Mangrove Oyster, Crassostrea rhizophorae, as a Biomonitor for Mercury in Tropical Estuarine Systems, Northeast Brazil

Autor: A. G. Vaisman, Rozane Valente Marins, Luiz Drude de Lacerda

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

Among pollutants anthropogenic origin, HG is of relevance due of the high toxicity of is different molecular species especialy em monomethylate form, and its presence in all industrial and urba effluent. [...]

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f49976c727f8d4c58e51ecee5b19771
https://doi.org/10.1007/s00128-005-0623-1

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The effects of land use change on mercury distribution in soils of Alta Floresta, Southern Amazon

Autor: Lacerda, Luiz Drude de, Souza, Margareth de, Ribeiro, Mario G.

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC

This study presents the spatial distribution, degree of contamination and storage capacity of Hg in surface forest and pasture soils from Alta Floresta, Southern Amazon, a significant gold mining site from 1980 to 1996. During that period, average an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::0db6ea5f0eee56af84e695886d9f218f
http://www.repositorio.ufc.br/handle/riufc/66191

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