Metals

Extraction efficiency (%) Single-metal leach

Extraction efficiency (%) Multi-metal leach

EDTA

EDDS

Hacac

CA

TA

EDTA

EDDS

Hacac

CA

TA

Cd

24

20

1

9

2

18

26

7

11

4

Cu

12

11

23

5

3

10

18

10

10

1

Ni

5

3

5

3

1

9

14

17

9

2

Pb

16

20

2

12

3

19

30

3

10

3

Zn

9

12

10

9

3

10

18

14

8

2