A live-step sequential extraction technique was used to determine the partitioning of Cr, Mn, Fe, Cu, Zn, Cd, and Pb among the operative sedimentary phases (exchangeable ions, carbonates, manganese and iron oxides, sulfides and organic matter. and residual minerals) in coastal sediment from three locations in the southwest Iberian Peninsula. Two sites are located close to industrial areas, the ...

forty seven sediment cores recovered from the south china sea coasts along the east coast of peninsular malaysia were analysed for as, cd, cr, cu, hg, ni, pb and zn using instrumental neutron activation analysis. the results indicate a homogeneous distribution except for as and pb in all stations. assessment of heavy metal pollution in marine sediments requires knowledge of pre-anthropogenic me...

Assessment of the ecological quality of theMinho estuary (Northwest Iberian Peninsula) based on metal concentrations in sediments and in Corbicula fluminea The concentrations of metals (Cd, Cr, Cu, Fe, Ni, Pb and Zn) in sediments and the soft tissues of Corbicula fluminea from the Minho estuary (Northwest Iberian Peninsula) were determined to assess the spatial variation of metal bioavailabilit...

The contents, speciation, source factors and potential ecological risks of the selected metals (Cr, Ni, Cu, Pb, Zn, Cd and As) were analyzed in surface sediments from Daya Bay (DYB). The results show that, with the exception of Pb, metal concentrations have decreased at all sites over the past decade. The distribution features of these concentrations represent a ring shape that descends from sh...

Heavy metal contamination in soil is considered a global crisis and its bulk proportion are developing countries like Bangladesh. Five heavy metals such as Cd, Cr, Pb, Cu Ni were investigated the of Savar tannery industrial estate. The decreasing trend was observed Cr>Cu>Ni>Pb>Cd. According to US EPA guideline, Cr heavily polluted at selected locations. highly polluted, whereas Cd P...

The objective of this study was determining the heavy metal contents in sediment along the coastlines of Hormuzgan province. Sediment constitutes are important part of aquatic ecosystems. They provide habitat for benthic organisms and could be a significant sink as well as a potential source of contaminants. Three sources of heavy metals pollution in this area are industry, natural mineral...

The accumulation of Cd, Pb, Zn, and Cu in the starfish Asterias rubens was studied in a Norwegian fjord characterized by a gradient of metal pollution in the sediments, ranging from very high metal concentrations at its head to much lower levels at its opening. The concentrations of metals in starfish from natural populations along the gradient (long-term accumulation) and in starfish that were...