History of the accumulation of trace metals in sediments of the saline Rogoznica Lake (Croatia)

Center for Marine Research Zagreb, Ruder Bošković Institute, POB 1016, Bijenička cesta 54, 10 000 Zagreb, Croatia; Faculty of Natural Sciences, Department of Geology and Paleontology, University of Zagreb, Zagreb, Croatia
Science of The Total Environment (Impact Factor: 3.16). 01/1996; DOI: 10.1016/0048-9697(95)05058-2

ABSTRACT Geochemical and sedimentological characteristics, the sedimentation rate (by 137Cs dating) and the history of the accumulation of trace metals (Cd, Pb, Cu and Zn) in sediments from anoxic, marine water of the Rogoznica Lake, Croatia, have been studied. The sediment is a fine-grained silt throughout the profile, characterized as an authigenic carbonate sediment of mainly biogenic origin, belonging to the anoxic-sulfidic sedimentation environment. The relatively high sedimentation rate (0.093 g/cm2 per year) in the Rogoznica Lake, in comparison with the nearby coastal area, and the Krka River Estuary can be explained by higher primary biological production in the upper, oxic water layer, as well as the absence of sediment resuspension. The Rogoznica Lake behaves as a ‘sediment trap’ because of its small dimensions and sheltered position. The concentrations of trace metals in sediments are in the range usual for unpolluted marine carbonate sediments. Nevertheless, concentrations of Pb, Cu and Zn, in the uppercore profile of recent and sub-recent (up to the past 40 years) sediments, reflect anthropogenic influences. Leaded gasoline seems to be the principal anthropogenic source of Pb enrichment, while for Zn and Cu it may be of a communal origin, possibly due to recent tourist activity in this area.

  • [Show abstract] [Hide abstract]
    ABSTRACT: Taihu Lake is the third largest freshwater lake of China. The Taihu Lake drainage basin is an economically developed area, with one of the highest population densities in China. Zhushan Bay was one of the most polluted water bodies in northern Taihu Lake. Ten short sediment cores were collected from Zhusan Bay in 2003 and 2004. Heavy metals and nutrients were analyzed in order to understand their temporal and spatial change in recent sediments. The profiles of heavy metals (Cu, Pb, Zn, Cr and Ni) and nutrients (TOC, TN and TP) were similar showing upcore increasing tendencies in the top 5–10cm sediments for most cores while the depth of increase for OP was deeper than for other nutrients. TOC, TN, TP and OP averages are, respectively, 8.17, 0.92, 0.37 and 0.015g/kg and 11.65, 1.16, 0.67, 0.093g/kg for 10–30cm and 0–10cm sediment. The average value of Cu, Pb, Cr, Zn and Ni is 18.4, 24.6, 52.8, 55.6 and 27.8mg/kg for 10–30cm sediment, and 30.2, 39.5, 73.9, 100.2 and 41.0mg/kg for 0–10cm sediment, respectively. Except for lead, high positive correlations (>0.86, P
    Quaternary International - QUATERN INT. 01/2010; 226(1):23-28.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The constant rate of supply (CRS) of excess 210Pb model was successfully applied to assess 210Pb data of two sediment cores from the lake Qattinah, Syria. Gamma spectrometry was used to determine 137Cs and 210Pb activity concentrations. The bottom of the cores was 210Pb-dated to years 1907 and 1893. The accumulation rates were determined using 210Pb method and found to vary similarly in both cores from 0.10 ± 0.01 to 3.78 ± 0.57 kg m−2 y−1 during the past century. 137Cs was used as an in-dependent chronometer. The two distinct peaks observed on the 137Cs record of both cores, corresponding to 1965 and 1986, have allowed a successful validation of the CRS model.
    Geochronometria 03/2014; 41(1). · 1.24 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Investigations of metals concentrations (Cd and Pb) in bottom sediments from Wigry Lake were carried. Vertical distribution of metals was studied in the sediment cores from the Hańczańska Bay area. The sediment cores sliced into segments according to the lithology were taken for analysis for metals study samples and digested in a microwave oven with concentrated HNO3 and H2O2. Metals concentration was studied by ICP-MS method. Different levels of concentration were found, range of Cd and Pb concentrations was (mg kg -1 ): 0.33-11.0 and 6.33-318, respectively. The highest metal concentration was found in sediments from the delta of the Czarna Hańcza River. The obtained data was compared with metal concentrations in the lake sediments from the similar areas in Poland and other countries.
    Limnological Review. 10/2007; 7(4):215-219.