Cd

Pb

Cr

Ni

Cu

Hg

As

Zn

Mn

Cd

1

Pb

0.64^a

1

Cr

0.59^a

0.53^a

1

Ni

0.16

0.25

0.69^a

1

Cu

0.19

0.03

0.58^a

0.81^a

1

Hg

0.67^a

0.91^a

0.46^b

0.11

−0.10

1

As

0.63^a

0.88^a

0.61^a

0.42^b

0.13

0.80^a

1

Zn

0.45^b

0.53^a

0.63^a

0.78^a

0.63^a

0.45^b

0.63^a

1

Mn

0.37^b

0.06

0.53^a

0.35^c

0.53^a

0.02

0.06

0.33^c

1