Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 5

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

Toxic metals in bottom sediments and ferromanganese concretions of the Southern Baltic Sea

100%
Szefer P.
Oceanological Studies
|
2000
|
vol. 29
|
issue 1
31-55
EN
Horizontal and vertical distributions of micro- and macroelements in sediment from the Southern Baltic (including the Vistula Lagoon) are discussed. Variations of concentrations of trace metals and rare earth elements (REE) in ferromanganese concretions sampled from S?upsk Furrow in the Polish Exclusive Economic Zone are characterized. The lack of positive cerium anomalies in the concretions from S?upsk Furrow indicates that they were formed under less oxidizing conditions than spheroidal concretions from the Gulf of Bothnia. M?ssbauer studies indicate that poorly crystalline lepidocrosite is the principal iron oxyhydroxide mineral present in these concretions. It is concluded that Ag, Cd, Pb, Zn and possibly Cu are anthropogenic in origin. The concentrations of these elements decrease sharply with depth in the sediment column and the elements are preferentially enriched in the < 2 ?m size fraction of the sediment. The anthropogenic elements show no systematic decrease in concentration with depth in a sediment core collected near the mouth of the Vistula River. This reflects the higher sedimentation rate there such that the entire upper 20 cm of the core was deposited during the major, post-war period of industrialization in Poland. It is suggested that the heavy metals are mainly adsorbed on Fe oxyhydroxide particles with diameters greater than 2 ?m at the hydrological front where the Vistula River waters mix with brackish Baltic waters. It appears that heavy-metal pollution of sediments in some parts of Puck Bay may be greater than that near the mouth of the Vistula River which may reflect, in part, the higher sedimentation rate near the mouth of the Vistula River. The mode of incorporation of heavy metals into the sediments in the two areas may also be different. It is speculated that Cu, Zn and Ag have been introduced recently into the sediments of the Gulf of Gda?sk principally from the Vistula River, whereas Cd and Pb have been transported, in part, from the atmosphere. Cd like Pb is a volatile element easily subjected to atmospheric transport. The dual source of Cd and Pb (atmospheric and riverine) reaching the Gulf of Gda?sk may explain the complex interelement relationships displayed by these elements in the sediments of this region. Ag, on the other hand, is introduced into the marine environment mainly with sewage sludge.
2

Occurence of metals in the cockle Cerastoderma glaucum from different geographical regions in view of principal components analysis

63%
Szefer P., Wolowicz M.
Oceanological Studies
|
1993
|
issue 64/3
253-264
3

Distribution of elements in sediment cores of the Southern Baltic from the point of view of principal component analysis

63%
Szefer P., Kaliszan R.
Oceanological Studies
|
1993
|
issue 64/3
95-102
4

Trace metals in Gasterosteus aculeatus L. and its parasites from the Gulf of Gdansk

51%
Morozinska_Gogol J., Rokicki J., Frelek K., Szefer P.
Oceanological Studies
|
1998
|
vol. 27
|
issue 3
71-75
EN
In this study the concentrations of trace metals in typical parasites of the three-spined stickleback, i.e. Schistocephalus solidus (Cestoda) and Thersitina gasterostei (Copepoda), and in the sticklebacks (infected or uninfected) were compared. Concentrations of Mn, Co, Ni, Cu, Zn, Cd and Pb were determined. The accumulations of metals suggested that S. solidus, T. gasterostei and their hosts could serve as biological indicators of heavy metal contamination.
5

Distribution of elements in surficial sediments of the Southern Baltic determined by factor analysis

51%
Szefer P., Pempkowiak J., Kaliszan R.
Oceanological Studies
|
1993
|
issue 64/3
85-93
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.