NDLI: Chemical and mineralogical characterization of the sediments from the Mira, Ílhavo and Ovar channels of Aveiro Lagoon (Portugal) Caracterización química y mineralógica de los sedimentos de los canales de Mira, Ílhavo y Ovar de la Laguna de Aveiro (Portugal)

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Chemical and mineralogical characterization of the sediments from the Mira, Ílhavo and Ovar channels of Aveiro Lagoon (Portugal) Caracterización química y mineralógica de los sedimentos de los canales de Mira, Ílhavo y Ovar de la Laguna de Aveiro (Portugal)

Content Provider	Semantic Scholar
Author	Rocha, Fernando Silva, Eduardo F. Bernardes, Cristina Donizeti Vidinha, J. Patinha, Carla
Copyright Year	2005
Abstract	The paleoenvironmental reconstruction of Aveiro Lagoon is being carried out based on the sedimentological, paleoecological, geochemical and mineralogical characterization of sediment samples collected systematically in the lagoon. This paper presents results concerning the changes in the chemical and mineralogical composition of the fine fraction (<63 µm) and the clay fraction (<2 µm) in sediment samples from Aveiro Lagoon, mainly collected from the lower intertidal plain and subtidal deposits located along the Mira, Ilhavo and Ovar channels. A zonography of the lagoon was established based on the parameters analyzed. The results show that the surface and near-surface sediments of Aveiro Lagoon trap relatively large quantities of trace metals, such as Cu, Pb, Co, Ni, Cd, Zn, Fe, Mn and Cr, considered to be partially adsorbed, particularly on silty and clayey particles, and co- precipitated on Fe and Mn oxyhydroxide forms precipitated in the topmost layers of sediments. Series of statistically significant relationships were established between trace metal concentrations and clay content and semi-quantitatively determined clay mineral species in the sediments.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://ria.ua.pt/bitstream/10773/13802/1/chemical%20and%20mineralogical%20characterization%20of%20the%20sediments%20from%20mira.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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