494
K. M. G. Mostofa et al.
Table 3 The fluorescence index (F
index ) of allochthonous fulvic and humic acids in contrast to autochthonous fulvic acid (C-like) of algal origin and their
various sources identified using PARAFAC modelling on EEM spectra in water samples
DOM sources
Fluorescence index (F
index )
References
F
Peak A/Peak C
F
250:330/440–450
f
450/500
HIX **
Fulvic acid of forest origin
Standard Suwannee River Fulvic Acid
(n
= 3; 1–2 mg L
−1 )
1.80
1.47
1.33
23
Mostofa et al. (2005a) a
Standard Suwannee River Fulvic Acid
(n
= 4; 1–5 mg L
−1 )
1.56
1.29
1.40
25
Mostofa et al. (2005a) a
Standard Suwannee River Fulvic Acid
(n
= 5; 0.5–5 mg L
−1 )
1.55
1.18
1.30
−59
Mostofa et al. (2005a) a
Standard Suwannee River Humic Acid
(n
= 3; 1–5 mg L
−1 )
1.91
2.08
1.28
14
Mostofa et al. (2005a) a
Standard Suwannee River Humic Acid
(n
= 4; 1–5 mg L
−1 )
1.95
2.12
1.30
12
Mostofa et al. (2005a) a
Fulvic acid, upstream: Nishi-Mataya and
Higashi-Mataya (n
= 6)
1.69–1.78
1.60–1.78
1.55–1.65
12, 35
Mostofa et al. (2005b) a
Fulvic acid-like, upper branch waters (Z),
Yellow River, China (n
= 7)
1.30
1.36
2.02
25
Mostofa KMG et al., (unpublished data)
Fulvic acid, upper main channel waters (G),
Yellow River, China (n
= 18)
1.87
3.13
3.22
8
Mostofa KMG et al., (unpublished data)
Fulvic acid, downstream: Amano, Echi and
Ane Rivers (n
= 6)
1.65–1.78
1.62–1.72
1.58–1.70
4, 12, 17
Mostofa et al. (2005b) a
Photochemical effects on standards and river waters
Irradiated standard Suwannee River
Fulvic Acid (n
= 2; 10 h and 20 h)
1.73
1.94
1.91
5
Mostofa KMG et al., (unpublished data)
Irradiated standard Suwannee River Humic
Acid (10 h)
1.94
2.00
1.33
7
Mostofa KMG et al., (unpublished data)
Irradiated upstream river waters, Kago
upstream, Lake Biwa watershed, Japan
1.8
1.55
1.30
2
Mostofa et al. (2007a) a
Irradiated fulvic acid, upper branch waters
(Z), Yellow River, China (3 h, n
= 2)
1.93
2.3
2.78
−8
Mostofa KMG et al., (unpublished data)
(continued)