10% Fe

G-C

10% Fe

H-C

30% Fe

G-C

Volume (L)

0.1

0.1

0.1

Fe (mg)

10

10

30

time (h)

Leached

Fe (µg/L)

Leached

Fe (µg/L)

Leached

Fe (µg/L)

1

5

47

120

4

9.6

36

230

22

62

66

760

24

36

16

18

48

12

11

14

Total leached Fe (µg)

12.5

17.6

114.2

Wt. % Fe leached

0.12

0.18

0.38