Accumulation and biological cycling of heavy metal in four salt marsh species, from Tagus estuary (Portugal)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Duarte, B (Autor) Outra; Caetano, M (Autor) Outra; Pedro Almeida (Autor) Outra; Vale, C (Autor) ICBAS; Cacador, I (Autor) Outra

Revista

Título: Environmental Pollution

Vol. 158

Páginas: 1661-1668

ISSN: 0269-7491

Editora: Elsevier

Indexação

ISI Web of Knowledge - 83 Citações

Scopus - 120 Citações

Outras Informações

ID Authenticus: P-003-6YK

DOI: 10.1016/j.envpol.2009.12.004

Abstract (EN): Pools of Zn, Cu, Cd and Co in leaf, stem and root tissues of Sarcocornia fruticosa, Sarcocornia perennis, Halimione portulacoides and Spartina maritima were analyzed on a bimonthly basis, in a Tagus estuary salt marsh. All the major concentrations were found in the root tissues, being the concentrations in the aboveground organs neglectable for sediment budget proposes, as seen by the low root-aboveground translocation. Metal annual accumulation, root turnovers and cycling coefficients were also assessed. S. maritima showed the higher root turnovers and cycling coefficients for most of the analyzed metals, making this a phytostabilizer specie. By contrast the low root turnover, cycling coefficient and low root necromass generation makes S. perennis the most suitable specie for phytoremediation processes. Although the high amounts of metal return to the sediments, due to root senescence, salt marshes can still be considered sinks of heavy metals, cycling heavy metals mostly between sediment and root.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8