Environmental Engineering Reference
In-Depth Information
Table 3
The reaction rate constants for the production of HO
•
in
photo-ferrioxalate/H
2
O
2
reaction
Reaction type
−
1
s
−
1
)
Rate constant (
k
) (M
Equations
References
+
(n-1)C
2
O
4
2
−
•
−
Fe
III
(C
2
O
4
)
3
−
2n
+
h
υ
→
Fe
2
+
+
C
2
O
4
-
3.19
Jeong and Yoon (
2005
)
•
−
C
2
O
4
•
−
2
×
10
12
→
CO
2
+
CO
2
3.20
Mulazzani et al. (
1986
)
Fe
III
(C
2
O
4
)
n
3
−
2n
+
CO
2
•
−
→
CO
2
+
Fe
II
(C
2
O
4
)
n
2
−
2n
≈
8
×
10
9
3.21
Jeong and Yoon (
2004
)
•
−
←←
•
2.4
×
10
9
CO
2
+
O
2
→
CO
2
+
O
2
3.22
Hislop and Bolton (
1999
)
•
−
Fe
III
(C
2
O
4
)
n
3
−
2n
+
O
2
→
O
2
+
Fe
II
(C
2
O
4
)
n
2
−
2n
<1
×
10
6
3.23
Sedlak and Hoigné (
1993
)
Fe
III
(C
2
O
4
)
n
3
−
2n
+
HO
2
•
→
O
2
+
Fe
II
(C
2
O
4
)
n
2
−
2n
<1.2
×
10
5
3.24
Sedlak and Hoigné (
1993
)
•
−
Fe
II
(C
2
O
4
)
+
H
2
O
2
→
Fe
III
(C
2
O
4
)
+
3.1
×
10
4
+
HO
+
OH
3.25
Sedlak and Hoigné (
1993
)
Fe
2
+
+
HO•
→
Fe
III
(OH)
2
+
4.3
×
10
8
3.26
Zuo and Hoigné (
1992
)
Fe
III
(OH)
2
+
+
h
υ
→
Fe
2
+
+
HO•
Negligible
3.27
Jeong and Yoon (
2005
)
•
−
Fe
3
+
→
Fe
2
+
1.5
×
10
8
+
O
2
+
O
2
3.28
Balmer and Sulzberger (
1999
)
•
−
−
C
2
O
4
2
−
7.7
×
10
6
+
HO•
→
CO
2
+
CO
2
+
OH
3.29
Buxton et al. (
1988
)
HC
2
O
4
—
+
HO•
→
CO
2
+
CO
2
•
−
4.7
×
10
7
+
H
2
O
3.30
Buxton et al. (
1988
)
CPAA
a
+
HO•
→
products
3.0
×
10
9
3.31
Pignatello (
1992
)
−
1
)
Equilibrium reactions
Equilibrium constants
(M
2.5
×
10
9
Fe
3
+
+
C
2
O
4
2
−
↔
Fe
III
(C
2
O
4
)
+
3.32
Faust and Zepp (
1993
)
Fe
III
(C
2
O
4
)
+
+
C
2
O
4
2
−
↔
Fe
III
(C
2
O
4
)
2
−
6.3
×
10
6
3.33
Faust and Zepp (
1993
)
Fe
III
(C
2
O
4
)
−
+
C
2
O
4
2
−
↔
Fe
III
(C
2
O
4
)
3
3
−
3.8
×
10
4
3.34
Faust and Zepp (
1993
)
Fe
2
+
+
C
2
O
4
2
−
↔
Fe
II
(C
2
O
4
)
2.0
×
10
5
3.35
Faust and Zepp (
1993
)
Fe
II
(C
2
O
4
)
+
C
2
O
4
2
−
↔
Fe
II
(C
2
O
4
)
2
2
−
1.2
×
10
2
3.36
Faust and Zepp (
1993
)
+
↔
C
2
O
4
2
−
+
6.2
×
10
1
+
H
HC
2
O
4
3.37
Zuo and Hoigné (
1992
)
HO
2
•
↔
O
2
•−
+
6.2
×
10
1
+
H
3.38
Bielski et al. (
1985
)
a
CPAA means the 2,4-dichlorophenoxyacetic acid
