Organic species

Protonated

Deprotonated

Al-Complexed

pH 4

Fulvic Acid-Site#1

61.4

38.3

0.23

Fulvic Acid-Site#2

96.9

1.8

1.2

Humic Acid-Site#1

72.1

26.9

0.97

Humic Acid-Site#2

93.6

4.7

1.8

Fulvic Acid Dissolved-Site#1

51.2

48.7

0.12

Fulvic Acid-Dissolved-Site#2

97

1.8

1.2

pH 5

Fulvic Acid-Site#1

46.1

53.4

0.47

Fulvic Acid-Site#2

90.9

5.4

3.7

Humic Acid-Site#1

52.2

45.4

2.4

Humic Acid-Site#2

87.1

8.7

4.2

Fulvic Acid Dissolved-Site#1

33.4

66.3

0.18

Fulvic Acid-Dissolved-Site#2

91.4

5.1

3.4

pH 6

Fulvic Acid-Site#1

30.6

68.7

0.6

Fulvic Acid-Site#2

78.9

12.6

8.6

Humic Acid-Site#1

29.8

66.7

3.5

Humic Acid-Site#2

77.4

14.7

7.9

Fulvic Acid Dissolved-Site#1

18.4

81.4

0.16

Fulvic Acid-Dissolved-Site#2

81.0

11.4

7.6

pH 7

Fulvic Acid-Site#1

17.0

82.7

0.3

Fulvic Acid-Site#2

71.4

17.1

11.5

Humic Acid-Site#1

14.3

83.7

2.0

Humic Acid-Site#2

72.0

19.2

8.8

Fulvic Acid Dissolved-Site#1

8.8

91.1

0.06

Fulvic Acid-Dissolved-Site#2

74.3

15.6

10.1