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Pregled bibliografske jedinice broj: 759573

Časopis

Autori: Mlakar, Marina; Fiket, Željka; Geček, Sunčana; Cukrov, Neven; Cuculić, Vlado
Naslov: Marine lake as in situ laboratory for studies of organic matter influence on speciation and distribution of trace metals
Izvornik: Continental shelf research (0278-4343) 103 (2015); 1-11
Vrsta rada: članak
Ključne riječi: marine lake; geochemical processes; trace metals; sediments; organic matter
Sažetak:
Karst marine lakes are unique marine systems, also recognized as in situ “laboratories” in which geochemical processes on a different scale compared to the open sea, can be observed. In this study, organic matter cycle and its impact on distribution of trace metals in the marine lake Mir, located on Dugi Otok Island, in the central part of the eastern Adriatic Sea, was investigated for the first time. Studied marine lake is small, isolated, shallow basin, with limited communication with the open sea. Intense spatial and seasonal variations of organic matter, dissolved and particulate (DOC, POC), and dissolved trace metals concentrations in the water column of the Lake are governed predominantly by natural processes. Enhanced oxygen consumption in the Lake during summer season, high DOC and POC concentrations and low redox potential result in occasional occurrence of anoxic conditions in the bottom layers with appearance of sulphur species. Speciation modelling showed that dissolved trace metals Cu, Pb and Zn, are mostly bound to organic matter, while Cd, Co and Ni are present predominantly as free ions and inorganic complexes. Trace metals removal from the water column and their retention in the sediment was found to depend on the nature of the relationship between specific metal and organic or inorganic phases, sulphides, Fe-oxyhydroxydes or biogenic calcite. The above is reflected in the composition of the sediments, which are, in addition to influence of karstic background and bathymetry of the basin, significantly affected by accumulation of detritus at the bottom of the Lake.
Projekt / tema: HRZZ-8607
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Geologija,Kemija
URL Internet adrese: http://www.sciencedirect.com/science/article/pii/S0278434315001211
http://dx.doi.org/10.1016/j.csr.2015.04.024
Broj citata:
Altmetric:
DOI: 10.1016/j.csr.2015.04.024
URL cjelovitog teksta:
Google Scholar: Marine lake as in situ laboratory for studies of organic matter influence on speciation and distribution of trace metals
Upisao u CROSBI: Vlado Cuculić (Vlado.Cuculic@irb.hr), 28. Tra. 2015. u 09:48 sati



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