784
K. M. G. Mostofa et al.
Cu 2+
with fulvic acid
(extracted from soil) (Ex/
Em
= 335/350 nm)
4.78–5.70 (K
1 )
–
–
–
–
5.0–7.0 Hays et al. (2004)
Fe 3+
with fulvic acid (modeled)
5.66 (K
1 )
–
–
–
–
4
Antunes et al. (2007)
Hg 2+
with fulvic acid (modeled)4.44
(K
1 )
–
–
–
–
6
Antunes et al. (2007)
UO
2
2+
with fulvic acid (modeled)
5.46 (K
1 )
–
–
–
–
3.5
Antunes et al. (2007)
Cu 2+
with humic acid (modeled)–
4.83 (K
1 )
–
–
–
6
Antunes et al. (2007)
Cu 2+
with humic acid (modeled)–
8.55 (K
1 ); 4.02
(K
2 )
–
–
–
?
Tipping (1994)
Cu 2+
with humic acid (extraced
from soil)
–
3.99–4.49 (K
1 ) –
–
–
4
Cao et al. (2004)
Fe 3+
with humic acid (modeled) –
6.79 (K
1 )
–
–
–
4
Antunes et al. (2007)
Hg 2+
with humic acid (modeled)
–
5.50 (K
1 )
–
–
–
6
Antunes et al. (2007)
UO
2
2+
with humic acid (modeled)
–
4.27 (K
1 )
–
–
–
3.5
Antunes et al. (2007)
As 3+
with Aldrich humic acid
(modeled)
–
5.8–7.2 (K
1 );
4.5–5.3 (K
2 )
–
–
–
5.2–9.3 Liu and Cai (2010)
Cu 2+
with tryptophan (modeled)
(Ex/Em
= 285/360 nm)
–
–
4.88–4.90 (K
1 )
–
–
6
Hays et al. (2004)
Cu 2+
with glycyl-tryptophan
(modeled) (C
13 H
15 N
3 O
3 )
(Ex/Em
= 285/360 nm)
–
–
5.81–6.02 (K
1 )
–
–
6
Hays et al. (2004)
Acid/alkali/alkaline earth
elements
–
–
–
–
–
Table 1 (continued)
Elements or groups
Conditional stability constants (log
10 K)
pH
References
Fulvic acid a
Humic acid a
Tryptophan or
protein or EPS a
Autochthonou DOM
or hydrophilic or
hydrophobic a
Other organic
ligands a
(continued)