Environmental Engineering Reference
In-Depth Information
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
Cu
2
+
with tryptophan-like or
protein-like component
-
-
7.82-9.56
-
?
Wu and Tanoue
(2001b
)
Pb
2
+
with humic acid,
sewage sludge (Ex/
Em
=
340/438 nm)
-
4.95
-
-
-
8.1
Plaza et al. (
2006
)
Pb
2
+
with humic acid, soil
(Ex/Em
=
440/510 nm)
-
5.81
-
-
-
8.1
Plaza et al. (
2006
)
Pb
2
+
with humic acid, amended
soil
+
sewage sludge
(Ex/Em
=
440/510 nm)
-
5.53
-
-
-
8.1
Plaza et al. (
2006
)
Cd
2
+
with humic acid,
sewage sludge (Ex/
Em
=
340/438 nm)
-
4.24
-
-
-
8.1
Plaza et al. (
2006
)
Cd
2
+
with humic acid, soil
(Ex/Em
=
440/510 nm)
-
4.63
-
-
-
8.1
Plaza et al. (
2006
)
Cd
2
+
with humic acid, amended
soil
+
sewage sludge
(Ex/Em
=
440/510 nm)
-
4.47
-
-
-
8.1
Plaza et al. (
2006
)
Hg
2
+
with extracellular polymeric
substances (EPS) (peak T:
275-280/428-334 nm)
-
-
3.28-4.12 (
K
1
)
-
-
4.0-8.0
Zhang et al. (
2010
)
Hg
2
+
with EPS (peak T
UV
:
220-230/422-336 nm)
-
-
4.28-4.49 (
K
2
)
-
-
4.0-8.0
Zhang et al. (
2010
)
Pb
2
+
with EPS
-
-
3.1-4.9 (
K
1
);
3.2-4.6 (
K
2
)
-
-
7
Comte et al.
(2006
)
