Fig 1.
Location of the sampling sites at Gazipur and Narayanganj.
The map was formed by ArcGIS software of version 10.8.
Table 1.
Trace element concentration (Mean ± SD) in the water samples (in µg/L).
Fig 2.
Spatial distribution of trace elements a. (As, Se, Pb, Cd, Co, Be); b. (Cr, Cu, Mn, Ni, V, Hg) in surface water of the nine location points. The map was formed by ArcGIS software of version 10.5.
Fig 3.
Water quality indices of nine sampling sites a. Heavy metal pollution index (HPI), b. Heavy metal evaluation index (HEI) and c. Degree of contamination (Cd).
Fig 4.
Hazard Index (HI) in the water collected from the sampling sites.
Fig 5.
Total Carcinogenic Risk (TCR) in the water collected from the sampling sites.
Fig 6.
Monte Carlo Simulation for TCR on a. Adults, b. Child.
Table 2.
Trace element concentration (Mean ± SD) in the sediment samples (in mg/kg).
Table 3.
Classification of sediment quality guidelines according to USEPA toxicity.
Fig 7.
Box-whisker plot of Geo-accumulation index (Igeo) of the trace elements in the sampling sites.
Fig 8.
Heat map of enrichment factor (EF) values of the nine sampling sites.
Fig 9.
Box-whisker plot of contamination factor (CF) of the trace elements in the sampling sites.
Fig 10.
Pollution Load Index (PLI) at the sampling sites.
Fig 11.
Potential Ecological Risk (PER) at the sampling sites.
Table 4.
Pearson’s correlation matrix among the trace element content in the water.
Table 5.
Pearson correlation matrix among the trace element content in the sediment.
Fig 12.
Scree plot and PCA loading plot of trace elements in water samples.
Fig 13.
Scree plot and PCA loading plot of trace elements in sediment samples.
Fig 14.
A hierarchical cluster (Dendrogram) among the sampling sites for water.
Fig 15.
A hierarchical cluster (Dendrogram) among the sampling sites for sediment.