Scientific Article
previous document  unige:17991  next document
add to browser collection
Title

In-situ determination of trace metal species in surface waters of Black Sea coastal area: comparison to bioavailability by green microalgae

Authors
Karadjova, Irina B
Karadjov, Metody
Tsalev, Dimiter L
Published in Environmental Science & Technology. 2009, vol. 43, p. 1798-1803
Abstract Trace metal speciation in seawater from the Bulgarian Black Sea coast was studied in situ by hollow fiber permeation liquid membrane (HF-PLM) and by diffusion gradients in thin- film gels (DGT). The concentrations of Cd, Cu, Ni, and Pb determined by HF-PLM were lower than those measured by DGT, in agreement with their analytical windows, e.g., free metal ions provided by the HF-PLM and dynamic (mobile and labile) species by the DGT. The obtained suite of data was further used to evaluate the bioavailability of these metals to the microorganisms, which was then compared with experimental results of metal uptake to green microalga Chlorella salina. Uptake fluxes of the Cd, Cu, Ni, andPbto C. salina, were predicted from the measured HF-PLM concentrations and laboratory experimentation in artificial seawater, in agreement with theoretical considerations. The HF-PLM and DGT appear to be promising analytical techniques for speciation and bioavailability studies in complex environmental media and allow improved understanding of the role of different chemical species in metal bioavailability (and impact) in seawaters.
Keywords Trace metal speciationSeawaterHollow fiber permeation liquid membraneDiffusion gradients in thin-film gelsBioavailability to green microalgae
Full text
Citation
(ISO format)
SLAVEYKOVA, Vera et al. In-situ determination of trace metal species in surface waters of Black Sea coastal area: comparison to bioavailability by green microalgae. In: Environmental Science & Technology, 2009, vol. 43, p. 1798-1803. https://archive-ouverte.unige.ch/unige:17991

241 hits

156 downloads

Update

Deposited on : 2012-01-04

Export document
Format :
Citation style :