pH

ORP

TOC

Fe

Mn

Cr

Cu

Ni

Zn

pH

1

Eh

0.412^**

1

TOC

−0.804^**

−0.568^**

1

Fe

−0.770^**

−0.632^**

0.942^**

1

Mn

−0.661^**

−0.621^**

0.848^**

0.946^**

1

Cr

−0.318^**

0.292^**

0.375^**

0.257^**

0.163^*

1

Cu

0.001

0.594^**

−0.055

−0.177^*

−0.189^*

0.765^**

1

Ni

0.102

0.579^**

−0.116

−0.175^*

−0.149^*

0.728^**

0.855^**

1

Zn

0.194^*

0.518^**

−0.300^**

−0.341^**

−0.354^**

0.059

0.358^**

0.303^**

1