Abstract
Sediment cores were obtained from several locations in the Calcasieu River/Lake Complex (Lousiana), including Calcasieu Lake, Calcasieu River, two bayou tributaries, and Lake Charles, during the period from November 1983 to November 1985. The cores were analyzed for Cu, Zn, Cr, and Pb. The approximate sedimentation rate and a core chronology were determined by the use of 137Cs and 210Pb. The increase in metal concentrations after 1933, particularly along Bayou d'Inde where most industries are located, points to anthropogenic input of these metals to the system. The fact that metal concentrations tend to merge to a common value prior to 1940 throughout the system suggests that geological factors do not contribute to the observed variations in metal concentrations of heavy metals found in this area. The background concentrations of heavy metals found in this study for the Calcasieu River/Lake Complex were: Cu (10 mg kg−1), Cr (25 mg kg−1), Pb (8 mg kg−1), and Zn (40 mg kg−1), The main emphasis of the study focused along Bayou d'Inde due to the enhanced levels of heavy metals found.
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Mueller, C.S., Ramelow, G.J. & Beck, J.N. Spatial and temporal variation of heavy metals in sediment cores from the calcasieu river/lake complex. Water Air Soil Pollut 43, 213–230 (1989). https://doi.org/10.1007/BF00279193
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DOI: https://doi.org/10.1007/BF00279193