Element

pH = 2

pH = 3

pH = 4

Weight %

Atomic %

Weight %

Atomic %

Weight %

Atomic %

O K

7.69

20.37

9.64

24.35

7.73

20.03

Na K

2.30

2.40

2.6

2.7

2.51

4.52

S K

27.85

33.71

29.02

33.86

26.44

34.18

Ca K

0.5

0.70

0.60

0.61

0.45

0.46

Fe K

2.06

1.56

1.96

1.42

1.90

1.41

Cu K

43.46

28.98

41.19

26.19

39.94

26.06

Zn K

16.14

12.28

17.58

10.87

21.04

13.34

Totals

100.00

100

100.00

100

100.00

100