Chemistry Reference
In-Depth Information
TABLE 6.9. Rate Constants for the Reaction of Fe(VI) and Fe(V) with APC at Different pH Values
k
(Fe
V
+APC)
(/M/s)
k
k
(
Fe V APC
Fe VI APC
(
)
+
+
)
k
(Fe
VI
+APC) (/M/s)
(
(
)
)
APC
pH 7.0
pH 9.0
pH 12.5
pH 12.5
pH 12.5
Gly
1.00 ± 0.12 × 10
2
1.10 ± 0.12 × 10
2
1.6 ± 0.1 × 10
−1
(1.4 ± 0.1) × 10
4
9.3 × 10
4
Gly-Gly
8.22 × 10
2
(3.0 × 10
1
)
a
1.51 × 10
2
-
-
-
2.3 × 10
2
1.89 ± 0.12 × 10
1
3.8 ± 0.5 × 10
−2
4.0 ± 0.3 × 10
3
1.1 × 10
3
IDA
NTA
7.00 × 10
0
7.10 ± 0.50 × 10
−1
≤ 4.4 × 10
−2
≤ 1.6 × 10
2
EDTA
1.0 × 10
2
1.72 ± 0.08 × 10
0
8.6 ± 0.8 × 10
−2
2.7 ± 0.1 × 10
2
3.1 × 10
3
DTPA
-
2.90 ± 0.14 × 10
0
1.7 ± 0.1 × 10
−1
2.6 ± 0.2 × 10
2
1.5 × 10
3
TTHA
-
3.60 ± 0.12 × 10
0
2.72 ± 0.30 × 10
−1
a
pH 4.0.
Data were taken from References 378 and 385.
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