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Pregled bibliografske jedinice broj: 2470

Distribution of mercury species in the water column of the stratified Krka River Estuary


Mikac, Nevenka; Kwokal, Željko
Distribution of mercury species in the water column of the stratified Krka River Estuary // Croatica Chemica Acta, 70 (1997), 1; 271-288 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 2470 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Distribution of mercury species in the water column of the stratified Krka River Estuary

Autori
Mikac, Nevenka ; Kwokal, Željko

Izvornik
Croatica Chemica Acta (0011-1643) 70 (1997), 1; 271-288

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
mercury species; water column; stratified estuary; Krka River

Sažetak
Investigation of the mercury speciation (total/reactive and dissolved/particular forms) was carried out in waters of the highly stratified Krka River Estuary. The concentrations obtained are in satisfactory agreement with those obtained for other unpolluted aquatic environments (0.5-2.5 ng/L for total mercury, 0.1-0.8 ng/L) for dissolved mercury and 0.04-0.75 micrograms/g for particulate mercury, phe > 0.45 microm). Two or three discernible lyaers (the upper fresh, or brackish water layer, deeper saline layer and the in-between intermediate water layer) revealed different distribution of mercury species. In the upper freshwater layer with low salinity, the fraction of reactive mercury varied considerably with salinity changes (10-100% of the total), both during a single sampling campaign, as well as between particular sapling periods which coincided with different seasons and river regimes. This generally corresponded to the dissolved mercury fraction, confirming the insignificance of the organically bound dissolved mercury. In the bottom saline layer, mercury was mostly reactive (80-100% of the total), and even a part of the particulate mercury behaved as labile toward SnCl_2 reduction. In the upper water layer (low-salinity), the largest fraction of mercury was bound to particles, which were mostly of biological origin (plankton), except in the lower part of the estuary, where the particles were of anthropogenic origin (municipal) waste discharge from the city of Šibenik). Accumulation of mercury, both in reactive and particulate form, was observed at the halocline, e.g., at the fresh/saline water interface (FSI).

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
00981502

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Željko Kwokal (autor)

Avatar Url Nevenka Mikac (autor)


Citiraj ovu publikaciju

Mikac, Nevenka; Kwokal, Željko
Distribution of mercury species in the water column of the stratified Krka River Estuary // Croatica Chemica Acta, 70 (1997), 1; 271-288 (međunarodna recenzija, članak, znanstveni)
Mikac, N. & Kwokal, Ž. (1997) Distribution of mercury species in the water column of the stratified Krka River Estuary. Croatica Chemica Acta, 70 (1), 271-288.
@article{article, year = {1997}, pages = {271-288}, keywords = {mercury species, water column, stratified estuary, Krka River}, journal = {Croatica Chemica Acta}, volume = {70}, number = {1}, issn = {0011-1643}, title = {Distribution of mercury species in the water column of the stratified Krka River Estuary}, keyword = {mercury species, water column, stratified estuary, Krka River} }
@article{article, year = {1997}, pages = {271-288}, keywords = {mercury species, water column, stratified estuary, Krka River}, journal = {Croatica Chemica Acta}, volume = {70}, number = {1}, issn = {0011-1643}, title = {Distribution of mercury species in the water column of the stratified Krka River Estuary}, keyword = {mercury species, water column, stratified estuary, Krka River} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





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