pH

Cu

Mn

Cd

Fe

Pb

As

Hg

Zn

pH

1

Cu

−0.035

1

Mn

0.143

0.500*

1

Cd

0.092

0.639**

0.418

1

Fe

0.235

−0.365

−0.118

−0.112

1

Pb

−0.14

0.493

0.574*

0.553*

−0.031

1

As

−0.117

0.292

0.206

0.141

−0.591*

0.34

1

Hg

−0.117

0.32

0.649**

−0.03

0.009

0.42

0.092

1

Zn

−0.25

0.733**

0.729**

0.457

−0.053

0.555*

0.212

0.707**

1