Cr (μg/L)

28.83 ± 0.071^**

0.06 ± 0.003

Cu (μg/L)

2.59 ± 0.004^**

0.18 ± 0.003

Zn (μg/L)

19.51 ± 0.100^**

0.81 ± 0.013

Cd (μg/L)

0.07 ± 0.002^**

0.001 ± 0.0007

Pb (μg/L)

0.63 ± 0.011^**

0.03 ± 0.001