2009
LA-ICP-MS heavy metal analyses of fish scales from sediments of the Oxbow Lake Certak of the Morava River (Czech Republic)
HOLÁ, Markéta, Jiří KALVODA, Ondřej BÁBEK, Rostislav BRZOBOHATÝ, Ivan HOLOUBEK et. al.Základní údaje
Originální název
LA-ICP-MS heavy metal analyses of fish scales from sediments of the Oxbow Lake Certak of the Morava River (Czech Republic)
Název česky
LA-ICP-MS heavy metal analyses of fish scales from sediments of the Oxbow Lake Certak of the Morava River (Czech Republic)
Autoři
HOLÁ, Markéta (203 Česká republika, garant), Jiří KALVODA (203 Česká republika), Ondřej BÁBEK (203 Česká republika), Rostislav BRZOBOHATÝ (203 Česká republika), Ivan HOLOUBEK (203 Česká republika), Viktor KANICKÝ (203 Česká republika) a Radek ŠKODA (203 Česká republika)
Vydání
Environmental Geology, Berlin, Springer, 2009, 0943-0105
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
Geochemie
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.078
Kód RIV
RIV/00216224:14310/09:00036096
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000267104600017
Klíčová slova česky
geochemistry heavy metals pollutants
Klíčová slova anglicky
geochemistry heavy metals pollutants
Změněno: 29. 6. 2009 09:53, prof. RNDr. Jiří Kalvoda, CSc.
V originále
Heavy metal concentrations were studied in the scales of recent and subrecent (2-25 years old) fish buried in the oxbow lake sediments of the Morava River. The samples were taken from two cores up to 4m deep and analysed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and an electron microprobe analysis (EMPA). The results were compared with heavy metal concentrations of bulk samples of the embedding sediment. The study has revealed substantial differences in heavy metal contents existing between the recent and subrecent fish scales documenting an extreme rapidity of the diagenesis/fossilization processes. The most apparent features of the early fossilization include the quick loss of the mucous envelope, collagen and magnesium and an enormous increase in the heavy metal concentrations in particular iron, which is connected with a colour change. The variations in heavy metal contents in fish scales within a sample are attributed to variations in heavy metal content in the environment and variable amounts of organic matter in the embedding sediment. In contrast to the contamination of the embedding sediment, no general increase in heavy metal concentrations in fish scales was observed down to the cores. It is inferred that the rapid sorption stabilizes the biologic hydroxyapatite of the fish scales, which thus rapidly attain a thermodynamic equilibrium with the embedding water-saturated sediment. The results show that the processes of sorption, fossilization and stabilization of hydroxyapatite can act very quickly over a time scale of several years and represent thus a great advantage in the preservation of the original signals of the ancient environments.
Česky
Heavy metal concentrations were studied in the scales of recent and subrecent (2-25 years old) fish buried in the oxbow lake sediments of the Morava River. The samples were taken from two cores up to 4m deep and analysed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and an electron microprobe analysis (EMPA). The results were compared with heavy metal concentrations of bulk samples of the embedding sediment. The study has revealed substantial differences in heavy metal contents existing between the recent and subrecent fish scales documenting an extreme rapidity of the diagenesis/fossilization processes. The most apparent features of the early fossilization include the quick loss of the mucous envelope, collagen and magnesium and an enormous increase in the heavy metal concentrations in particular iron, which is connected with a colour change. The variations in heavy metal contents in fish scales within a sample are attributed to variations in heavy metal content in the environment and variable amounts of organic matter in the embedding sediment. In contrast to the contamination of the embedding sediment, no general increase in heavy metal concentrations in fish scales was observed down to the cores. It is inferred that the rapid sorption stabilizes the biologic hydroxyapatite of the fish scales, which thus rapidly attain a thermodynamic equilibrium with the embedding water-saturated sediment. The results show that the processes of sorption, fossilization and stabilization of hydroxyapatite can act very quickly over a time scale of several years and represent thus a great advantage in the preservation of the original signals of the ancient environments.
Návaznosti
| MSM0021622412, záměr |
|