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Table 5

Linear correlation coefficients of heavy metals in different sampling locations

Sampling locationsPollutantsCorrelation coefficients
CuCrZnPbMnCdNi
Overpass section Cu 
Cr 0.17 
Zn 0.26 0.35 
Pb 0.15 0.65 0.08 
Mn 0.18 0.66 0.89 0.24 
Cd 0.42 0.38 0.24 0.12 0.4 
Ni 0.03 0.1 0.3 0.29 0.1 0.47 
Residential area Cu 
Cr 0.25 
Zn 0.51 0.5 
Pb 0.91 0.34 0.46 
Mn 0.8 0.47 0.16 0.69 
Cd 0.12 0.54 0.3 0.12 0.29 
Ni 0.7 0.33 0.54 0.75 0.63 0.14 
Road sidewalk Cu 
Cr 0.49 
Zn 0.34 0.58 
Pb 0.08 0.25 0.15 
Mn 0.31 0.31 0.06 0.04 
Cd 0.07 0.07 0.18 0.57 0.05 
Ni 0.24 0.24 0.03 0.86 0.32 0.7 
College area Cu 
Cr 0.54 
Zn 0.78 0.65 
Pb 0.52 0.34 0.89 
Mn 0.26 0.28 0.24 0.19 
Cd 0.93 0.65 0.9 0.7 0.43 
Ni 0.65 0.69 0.55 0.29 0.81 0.76 
Sampling locationsPollutantsCorrelation coefficients
CuCrZnPbMnCdNi
Overpass section Cu 
Cr 0.17 
Zn 0.26 0.35 
Pb 0.15 0.65 0.08 
Mn 0.18 0.66 0.89 0.24 
Cd 0.42 0.38 0.24 0.12 0.4 
Ni 0.03 0.1 0.3 0.29 0.1 0.47 
Residential area Cu 
Cr 0.25 
Zn 0.51 0.5 
Pb 0.91 0.34 0.46 
Mn 0.8 0.47 0.16 0.69 
Cd 0.12 0.54 0.3 0.12 0.29 
Ni 0.7 0.33 0.54 0.75 0.63 0.14 
Road sidewalk Cu 
Cr 0.49 
Zn 0.34 0.58 
Pb 0.08 0.25 0.15 
Mn 0.31 0.31 0.06 0.04 
Cd 0.07 0.07 0.18 0.57 0.05 
Ni 0.24 0.24 0.03 0.86 0.32 0.7 
College area Cu 
Cr 0.54 
Zn 0.78 0.65 
Pb 0.52 0.34 0.89 
Mn 0.26 0.28 0.24 0.19 
Cd 0.93 0.65 0.9 0.7 0.43 
Ni 0.65 0.69 0.55 0.29 0.81 0.76 
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