排序方式： 共有6条查询结果，搜索用时 93 毫秒
1
1.
Gordana Pavlovic Delko Barisic Ivanka Lovrencic Visnja Orescanin Esad Prohic 《Environmental Geology》2005,47(4):475-481
This paper attempts to determine the impact of former Pb-Zn-Ba mining activities in Slovenian drainage basin on overbank sediments of the Sava river (West Croatia). Among the four studied sequences (S7, S8, S9, S10), the most upstream profile S7 showed the most pronounced impact of ore mining. Mercury was enriched more than 100-fold; Pb and Zn had a strong positive correlation (r > 0.99). Two factor models clearly revealed the Pb-Ba-Hg association in the lower-lying carbonate (CA) population of all four profiles, but only in the overlying silicate (SI) population of profile S7. Factor analysis confirmed this association in the total sediment (90 samples) as well as separately in the CA (33 samples) and SI (57 samples) populations. Based on a comparison with an undisturbed soil profile, the vertical distribution of 137Cs in profile S7 was interpreted to be the combination of caesium deposition caused by a flood in 1964 and by post-depositional redistribution. 相似文献
2.
The fate of heavy metals (Cu, Pb, Zn) from their sources to the final sink was analysed. Investigations included the identification of sources, the input from each source as well as transport towards their temporary (soil, vegetation, and marine water) and final sink (marine sediments). Research was conducted in the catchment area of Punat Bay on the island of Krk (Northern Adriatic, Croatia). Four sources were identified: long-range transport, traffic, antifouling paints and eroded material which annually introduced about 158 kg of Cu, 175 kg of Pb and 666 kg of Zn into the Bay. Antifouling paints were significant but not the main source of pollution in this area as was considered in previous investigations. Due to long-range transport, the input of Zn was almost four times greater, whereas the input of Pb was almost six times greater than the input from antifouling paints. Aerosols emitted from motor vehicles still represent the mayor source of Pb in this area. Cu originates mostly from antifouling paints and long-range transport. It was estimated that only around 30% of analysed elements introduced into the water column would be deposited in their final sink, i.e. marine sediments. 相似文献
3.
Granulometric and chemical composition of the Sava River sediments upstream and downstream of the Krsko nuclear power plant 总被引：2，自引：2，他引：0
Visnja?OrescaninEmail author Stipe?Lulic Gordana?Pavlovic Luka?Mikelic 《Environmental Geology》2004,46(5):605-614
Total concentrations of 13 elements (K, Ca, Ti, Cr, Mn, Fe, Cu, Zn, Rb, Sr, Y, Zr, Pb) in the size-fractionated Sava River sediments upstream and downstream of the Krsko nuclear power plant together with metal speciation within bulk sediment have been investigated. Trace metals generally increase with decreasing particle size, however, because of entrapment of organic matter in the 0.63–1 mm fraction, concentrations in the coarser sediment fraction are higher than expected. Exchangeable Pb, Zn, Cu, Mn, Cr and Fe are generally found to represent a negligible fraction of the total metal concentration of the bulk sediment. Seasonal variations of the Pb, Zn and Cu concentrations in the <0.5 mm fraction reflect decreased values during the spring period. Heavy metal concentrations in the 2003 waste water discharges from the Krsko nuclear power plant released into the Sava River were much lower than their maximum allowed values. Combined rubidium and organic matter normalization of the Zn, Pb and Cu concentrations, which was applied on the minus 0.063 mm fraction, indicated three potential sources of contaminants. 相似文献
4.
Distribution of trace elements in the coastal sea sediments of Maslinica Bay, Croatia 总被引：1，自引：0，他引：1
Nenad Mikulic Visnja Orescanin Loris Elez Ljiljana Pavicic Durdica Pezelj Ivanka Lovrencic Stipe Lulic 《Environmental Geology》2008,53(7):1413-1419
Spatial distributions of trace elements in the coastal sea sediments and water of Maslinica Bay (Southern Adriatic), Croatia
and possible changes in marine flora and foraminifera communities due to pollution were investigated. Macro, micro and trace
elements’ distributions in five granulometric fractions were determined for each sediment sample. Bulk sediment samples were
also subjected to leaching tests. Elemental concentrations in sediments, sediment extracts and seawater were measured by source
excited energy dispersive X-ray fluorescence (EDXRF). Concentrations of the elements Cr, Cu, Zn, and Pb in bulk sediment samples
taken in the Maslinica Bay were from 2.1 to over six times enriched when compared with the background level determined for
coarse grained carbonate sediments. A low degree of trace elements leaching determined for bulk sediments pointed to strong
bonding of trace elements to sediment mineral phases. The analyses of marine flora pointed to higher eutrophication, which
disturbs the balance between communities and natural habitats. 相似文献
5.
Visnja Orescanin Delko Barisic Ivanka Lovrencic Luka Mikelic Martina Rozmaric-Macefat Gordana Pavlovic Stipe Lulic 《Environmental Geology》2005,49(1):53-64
The objective of this study was chemical and radiological characterization of Kastela Bay sediments exposed to numerous anthropogenic sources like deposition of fly and bottom ash enriched in radionuclides and heavy metals, chemical plant, cement plant, iron plant, shipyard, electroplating facility, untreated industrial and domestic waste waters as well as heavy traffic. Totally, 33 samples of the mixture of fly and bottom ash, 12 sediment cores ranging from 0 to 40 cm and nine surface sediment samples were analyzed. Enrichment in heavy metals in the mixture of fly and bottom ash was ranging from 1.5 to 36 times compared to flysch soil while 226Ra and 238U were up to 50 times enriched compared to average activities characteristic for surrounding soils developed on the Middle and Upper Eocene flysch. Maximum 238U activity was approximately 32 times higher and 226Ra approximately 40 times higher in the Kastela Bay sediment compared to mean value determined for Adriatic sediments. The highest enrichment in sediment cores compared to background values were found for Zn (35.6 times), Pb (16 times), Cr (9.1 times) and Ni (4 times) 相似文献
6.
Visnja Orescanin Gordana Medunic Nenad Tomasic Vlasta Cosovic Ivanka Lovrencic Mikelic Stefica Kampic Jelena Urlic 《Environmental Earth Sciences》2009,59(3):695-701
The content of major element oxides (Al2O3, SiO2, CaO, MgO, Fe2O3, P2O5, K2O, TiO2, and MnO) in soil surrounding the light metal factory (TLM), which was producing aluminium from 1937 till 1991, was investigated by EDXRF and XRD. The evaluation of a possible aluminium pollution linked to the industrial activity was studied by a comparison of soil around the TLM with control soil samples. Taking into account natural variations caused by bedrock lithology, control samples were taken in the soil developed upon the Upper Cretaceous limestones and Middle Eocene flysch deposits, while the TLM soil was sampled over the Upper Cretaceous and Early to Middle Eocene limestones; that way the samples constituted four groups, each containing five to seven samples. Control soil overlying flysch deposits differed strikingly from the other three groups by its increased CaO values, and decreased content of Al, Fe, Mn, and Ti-oxides, confirming the overall geochemical imprint of bedrock lithology on the analysed soils. However, a specific mineral composition (presence of alumina) of the TLM soil, together with peculiar correlations among Al2O3 and other oxides indicates a certain extent of aluminium pollution of the investigated area. 相似文献
1