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Rječina River Sediments (Croatia) from Captured Spring to Polluted Prodelta (CROSBI ID 517759)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Frančišković-Bilinski, Stanislav ; Juračić, Mladen ; Tibljaš, Darko Rječina River Sediments (Croatia) from Captured Spring to Polluted Prodelta // Prirodoslovna istraživanja riječkog područja. II. znanstveni skup s međunarodnim sudjelovanjem. Knjiga sažetaka / Arko-Pijevac, Milvana ; Kružić, Borut ; Kovačić, Marcelo (ur.). Rijeka: Prirodoslovni muzej Rijeka, 2006. str. 55-56-x

Podaci o odgovornosti

Frančišković-Bilinski, Stanislav ; Juračić, Mladen ; Tibljaš, Darko

engleski

Rječina River Sediments (Croatia) from Captured Spring to Polluted Prodelta

Surface sediments (fraction <63 &#956; m) from source to the mouth prodelta of Rječina River (Croatia short karst alogene river (18.3 km), which is an important source of drinking water were studied to investigate changes in their mineral (by XRD) and chemical (by ICP-MS) composition in order to illustrate an anthropogenic influence at the lower course due to paper industry and mills, and in prodelta from untreated municipal sewage and large harbor of town Rijeka. In all analysed sediment samples and in the source rock quartz is a major mineral, while feldspar and mica group minerals are less abundant. Chlorite is a minor or trace mineral in all samples. Calcite and dolomite are abundant in the river prodelta, reflecting changes in bedrock lithology from flysch to carbonates. Among major elements Fe is the most abundant element in river sediments, and Ca in prodelta sediments. Concentrations of Al, Mn, Ni, Cr, Co, La and Nd decrease donstream, while Mg, S, Na, B, Pb, Zn, As, Sn, U, Mo, Hg and Ag accumulate in prodelta sediments. The results are compared with sediments of Rižana and Dragonja Rivers, which is used for drinking water supply of the southwest Slovenia, also with polluted sediments of Idrijca and Soča Rivers (Slovenia). Among the studied elements, As is present in all sediments at concentrations >6 ppm, that cause lowest toxic effects, at the lower Rječina and in prodelta Pb is present at concentrations >31 ppm, that could cause lowest toxic effects. Concentrations of Zn in prodelta, correspond to those occurring in moderately polluted sediments (90-200 ppm). In the prodelta Hg is slightly below toxicity threshold (1 ppm), while Ag is present at toxicity thershold (0.5 ppm) or close to it.

Rječina river; prodelta; sediments; mineral composition; chemical composition; pollution

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Podaci o prilogu

55-56-x.

2006.

objavljeno

Podaci o matičnoj publikaciji

Prirodoslovna istraživanja riječkog područja. II. znanstveni skup s međunarodnim sudjelovanjem. Knjiga sažetaka

Arko-Pijevac, Milvana ; Kružić, Borut ; Kovačić, Marcelo

Rijeka: Prirodoslovni muzej Rijeka

Podaci o skupu

Prirodoslovna istraživanja riječkog područja. II. znanstveni skup s međunarodnim sudjelovanjem

poster

14.06.2006-17.06.2006

Rijeka, Hrvatska

Povezanost rada

Geologija