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Abstrakt
The number, morphology and elemental composition of nanoparticles (<100 nm) in marine water was investigated using Variable Pressure Scanning Electron Microscopy (VP-SEM) and Energy-dispersive X-ray spectroscopy (EDS). Preliminary research conducted in the Baltic Sea showed that the number of nanoparticles in seawater varied from undetectable to 380 (x102) cm-3. Wind mixing and density barriers (thermocline) had a significant impact on the abundance and distribution of nanoparticles in water. Many more nanoparticles (mainly nanofibers) were detected in periods of intensive primary production and thermal stratification of water than at the end of the growing season and during periods of strong wind mixing. Temporal and spatial variability of nanoparticles as well as air mass trajectories indicated that the analysed nanofibers were both autochthonous and allochthonous (atmospheric), while the nanospheres were mainly autochthonous. Chemical composition of most of analysed nanoparticles indicates their autochthonous, natural (biogenic/geogenic) origin. Silica nanofibers (probably the remains of flagellates), nanofibers composed of manganese and iron oxides (probably of microbial origin), and pyrite nanospheres (probable formed in anoxic sediments), were all identified in the samples. Only asbestos nanofibers, which were also detected, are probably allochthonous and anthropogenic.
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Autorzy (5)
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Bożena Graca
- Uniwersytet Gdański Instytut Oceanografi
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Aleksandra Zgrundo
- Uniwersytet Gdański Instytut Oceanografi
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Danuta Zakrzewska
- Uniwersytet Gdański Instytut Oceanografi
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Monika Rzodkiewicz
- Uniwersytet im. Adama Mickiewicza w Poznaniu Instytut Geoekologii i Geoinformacji
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
CHEMOSPHERE
nr 206,
strony 359 - 368,
ISSN: 0045-6535 - Język:
- angielski
- Rok wydania:
- 2018
- Opis bibliograficzny:
- Graca B., Zgrundo A., Zakrzewska D., Rzodkiewicz M., Karczewski J.: Origin and fate of nanoparticles in marine water – Preliminary results// CHEMOSPHERE. -Vol. 206, (2018), s.359-368
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.chemosphere.2018.05.022
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 125 razy
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