Data/hora: 03/06/2024 11:08:22

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study	
Autores: 	Baptista Neto,José A.; Peixoto,Tomás C.S.; Smith,Bernard J.; Mcalister,John J.; Patchineelam,Soraya M.; Patchineelam,Sambasiva R.; Fonseca,Estefan M.	
Data: 	2013-01-01	
Ano: 	2013	
Palavras-chave: 	210Pb; Geochronology; Flux of heavy metal; Guanabara Bay.	
Resumo: 	Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to the bay and had a negative effect on its overall environmental. This is especially related to high volumes of untreated sewage and industrial effluents. This study evaluates the history of this human impact through detailed examination of a sediment core taken from the northern portion of Guanabara Bay. A geochronology is established using 210Pb dating and related to organic carbon and heavy metal fluxes to the sediments. This gave a calculated net average sedimentation rate for the core of 0.67 cm.year-1. The organic carbon and heavy metals flux started to increase at the beginning of the last century and the highest values was observed in the top of the cores.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401317	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201394612	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.85 n.4 2013	
Fonte: 	info:eu-repo/semantics/openAccess