Table 1.

Spearman correlation matrix of selected parameters and elements, for stream sediments digested by aqua regia and analyzed by ICP-MS/ES (n = 96)

Alkalinity (ppm CaCO3)Conductivity (uS/cm)pHDOEhLOI (%)Ag (ppb)As (ppm)Cd (ppm)Cu (ppm)Hg (ppb)Pb (ppm)Sb (ppm)Se (ppm)Zn (ppm)
Alkalinity (ppm CaCO3)1
Conductivity (uS/cm)0.91
pH0.590.281
DO−0.12−0.082−0.191
Eh−0.41−0.35−0.24−0.091
LOI (%)0.650.630.290.065−0.0331
Ag (ppb)0.550.430.21−0.11−0.160.711
As (ppm)0.70.620.130.12−0.080.850.811
Cd (ppm)0.150.0910.180.14−0.00670.290.780.551
Cu (ppm)0.680.580.078−0.13−0.0790.870.790.860.511
Hg (ppb)0.520.470.29−0.22−0.160.710.870.680.650.661
Pb (ppm)0.20.180.27−0.17−0.0380.370.770.540.660.520.791
Sb (ppm)0.690.650.21−0.17−0.140.780.880.840.660.840.820.631
Se (ppm)0.630.45−0.130.0410.0230.910.640.770.520.740.490.30.721
Zn (ppm)−0.017−0.0670.140.096−0.0310.130.70.470.930.440.640.730.580.421
Al (%)0.370.29−0.17−0.12−0.0320.56−0.0170.12−0.240.320.019−0.110.0850.1−0.16
Ca (%)−0.41−0.42−0.120.0230.077−0.79−0.7−0.64−0.53−0.71−0.58−0.37−0.71−0.61−0.46
Fe (%)0.470.2−0.120.34−0.0690.440.190.340.110.460.00180.040.10.250.086
K (%)0.620.51−0.11−0.37−0.060.70.190.32−0.0210.470.160.0430.360.4−0.0038
Mg (%)−0.63−0.40.15−0.0560.11−0.71−0.0095−0.260.13−0.390.0740.3−0.099−0.330.25
Na (%)−0.79−0.68−0.130.30.12−0.83−0.57−0.65−0.29−0.73−0.51−0.24−0.68−0.59−0.18
P (%)0.580.59−0.052−0.00420.00880.890.540.660.290.640.510.30.670.690.21
S (%)0.420.0470.099−0.23−0.42−3.90E-17−0.17−0.26−0.20.0009−0.28−0.2−0.22−0.08−0.19
Al (%)Ca (%)Fe (%)K (%)Mg (%)Na (%)P (%)S (%)
Alkalinity (ppm CaCO3)
Conductivity (uS/cm)
pH
DO
Eh
LOI (%)
Ag (ppb)
As (ppm)
Cd (ppm)
Cu (ppm)
Hg (ppb)
Pb (ppm)
Sb (ppm)
Se (ppm)
Zn (ppm)
Al (%)1
Ca (%)−0.151
Fe (%)0.4−0.151
K (%)0.63−0.320.311
Mg (%)−0.420.13−0.6−0.31
Na (%)−0.310.62−0.41−0.350.581
P (%)0.25−0.480.0110.4−0.15−0.491
S (%)0.058−0.060.110.15−0.130.1−0.171

Bold values indicated correlation coefficients >0.5 or <−0.5. Positive numbers indicate positive correlations; negative numbers indicate negative correlations.