Geochemical Baseline of Heavy Metals in Topsoil on Local Scale and Its Application
Li Ma 1
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College of Civil Engineering, Bengbu University, Bengbu 233030, China
Submission date: 2022-05-16
Final revision date: 2022-07-26
Acceptance date: 2022-07-27
Online publication date: 2022-10-17
Publication date: 2022-12-08
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Li Ma   

Bengbu University, China
Pol. J. Environ. Stud. 2022;31(6):5805-5813
Bengbu is the central city of Northern Anhui Province in the Huai River Basin, China. No relevant research has yet discussed the geochemical baseline of heavy metals in topsoil of Bengbu. In this study, 139 topsoil samples were collected and analyzed for heavy metal content from different districts in Bengbu main urban area, and the methods of normalization and cumulative frequency distribution (CFD) were used to determine the geochemical baseline. The results showed that the mean baseline values of Cr, Cu, Ni, Pb, Zn, Mn, and As were 40.10, 30.77, 31.41, 30.30, 54.23, 422.92, and 1.21 mg/kg, respectively. Based on these values, baseline factor pollution index (BFPI) and geoaccumulation index (Igeo) were applied to assess the enrichment level of the heavy metals. The mean indices (Igeo and Ki) for Cr, Cu, Ni, Pb, Zn, Mn, and As were all Igeo < 0 and Ki ≤ 1.2, indicating there was no heavy metal accumulation in study area as a whole. Igeo showed that 1.44% and 0.72% of the samples for Zn and Pb were moderately accumulated, and BFPI showed that the high accumulation rates of Zn, As, Pb and Cu in the samples accounted for 6.47%, 4.32%, 1.44% and 0.72%, respectively, the enrichment of heavy metals at individual sampling points needs attention.
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