Metal

EDTA

EDDS

Hacac

CA

(loading mg∙kg−1)

mg∙kg−1 leached

% efficiency

mg∙kg−1 leached

% efficiency

mg∙kg−1 leached

% efficiency

mg∙kg−1 leached

% efficiency

Cd (50)

17.0

34.5

12.0

24.1

2.1

4.4

17.0

34.6

Cu (550)

204.6

37.9

131.6

28.9

226.8

41.8

66.5

11.7

Ni (650)

227.7

37.3

88.4

16.4

215.1

36.7

97.9

18.1

Pb (1590)

702.1

45.4

207.0

13.1

30.1

1.9

150.2

10.3

Zn (2160)

567.7

26.9

129.8

6.0

327.0

16.4

356.2

18.2