Metal partitioning and availability in estuarine surface sediments: Changes promoted by feeding activity of Scrobicularia plana and Liza ramada

Pedro, Sílvia; Duarte, Bernardo; Reis, Givaldo; Pereira, Eduarda; Duarte, Armando C.; Costa, José Lino; Almeida, Pedro R.

doi:10.1016/j.ecss.2015.07.039

Cited by 10 publications

(1 citation statement)

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“…Conversely, sediment samples require a certain amount of preprocessing. For the heavy metal content determination in sediments, 0.1 g of each sample was digested with 2 ml of aqua regia (HNO 3 /HCl, 1:3 v/v) for 3 h at 110°C [ 20 ]. In each digestion step, duplicate samples and reagent blanks were also added.…”

Section: Methodsmentioning

confidence: 99%

Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China

Zhou

et al. 2017

PLoS ONE

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In this study, selected heavy metals (Hg, As, Cd, Pb, Cr, Cu and Zn) in the lake water and sediments from the Caohai wetland, which is a valuable state reserve for migrant birds in China, were investigated to assess the spatial distribution, sources, bioavailability and ecological risks. The results suggested that most of the higher concentrations were found in the eastern region of the lakeshore. The concentration factor (CF) revealed that Hg, Cd and Zn were present from moderate risk levels to considerable risk levels in this study; thus, based on the high pollution load index (PLI) values, the Caohai wetland can be considered polluted. According to the associated effects-range classification, Cd may present substantial environmental hazards. An investigation of the chemical speciation suggested that Cd and Zn were unstable across most of the sites, which implied a higher risk of quick desorption and release. Principal component analysis (PCA) indicated that the heavy metal contamination originated from both natural and anthropogenic sources.

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Section: Methodsmentioning

confidence: 99%