Geochemical baseline of trace elements in the sediment in Dexing area,South China |
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| Authors: | Yanguo Teng Shijun Ni Jinsheng Wang Ligen Niu |
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| Institution: | (1) Ministry of Education Key Laboratory of Water and Sediment, College of Water Sciences, Beijing Normal University, 100875 Beijing, China;(2) Department of Geochemistry, Chengdu University of Technology, 610059 Chengdu, China |
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| Abstract: | A baseline might be used as a point of reference to monitor change from some specific data without concern for whether the
baseline determination is natural or has been changed by human activity. We selected 326 sediment samples from Dexing area,
South China, and analyzed for 17 chemical elements. The geochemical baseline was predicted with the method of the normalization
procedure combined with the relative cumulative frequency curve. The results indicate Al was the best reference element for
the normalization procedure among four potential reference elements (Al, Fe, Ti, and Mn). The baseline value range obtained
from the normalization procedure method included both the regional geochemical background of the sediment and the median value
of the measured contents. The median value of baselines obtained from relative cumulative frequency method was lower than
that obtained from normalization procedure method. In contrast to the geochemical patterns of heavy metals in 1987, the spatial
distribution of anomalies sprawled in 2004 in study area, especially for Cu, Pb, Zn, Cd, As, Fe, and Cr. |
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| Keywords: | Geochemical baseline Sediment Trace elements Normalization procedure Relative cumulative frequency method |
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