Degradation of 3-MCP and 2,4,6-TCP.
|
pH of the sludge |
chlorophenol species |
||
|
3-MCP |
2,4,6-TCP |
From Reference 184. The percent degradation of 200 mg/L of 2,4,6- TCP and 3-MCP where degradation is defined as ring opening. It takes longer to achieve the formation of free chloride ion. Degradation is in sewage sludge at 27C after 3 days of aeration, and is a function of pH. | |
|
6.1 |
20 |
||
|
6.5 |
100 |
||
|
7.0 |
40 |
100 |
|
|
8.0 |
0 |
||
|
8.5 |
0 |
100 |
|
|
8.8 |
100 |
||
Degradation of 2-MCP.
|
pH of the |
temperature, C |
||||
|
sludge |
20 |
25 |
27 |
30 |
From Reference 184. |
|
6.5 |
33 |
88 |
|||
|
6.8 |
74 |
57 |
|||
|
7.3 |
27 |
89 |
|||
|
7.9 |
20 |
91 |
|||
|
8.4 |
22 |
6 |
|||
|
9.3 |
3 |
0 |
|||
Degradation of some Chlorophenols in Sewage Sludge.
|
compound |
% loss (184) |
days |
% loss (185) |
mg COD/gm/h |
||||||||
|
phenol |
98.5 |
80.0 |
||||||||||
|
2-MCP |
100 |
4 |
95.6 |
25.0 |
||||||||
|
3-MCP |
100 |
3 |
||||||||||
|
4-MCP |
100 |
3 |
96.0 |
11.0 |
||||||||
|
2,4-DCP |
100 |
5 |
98.0 |
10.5 |
||||||||
|
2,5-DCP |
16 |
4 |
||||||||||
|
2,4,6-TCP |
75 |
3 |
||||||||||
|
Na-PCP |
0 |
4 |
||||||||||
From References 184 (% degradation) and 185 (COD production). Maximum %
degradation of 100 mg/L over the specified time period, and the rate of COD
production. Degradation is defined as ring opening; it takes longer to achieve
free chloride ion formation.
Table 4.2.1 (continued)
Degradation of 2,4-DCP and 2,4,6-TCP in Sludge.
| initial
conc. in mg/L |
pH 7.0, 26C |
|||||
|
2,4-DCP |
2,4,6-TCP |
From references 184 and 185 % degradation after 2 days of treatment under the specified conditions of pH, initial concentration. and temperature. Degradation is defined as ring opening, it takes longer to achieve free chloride ion. | ||||
|
50 |
80 |
100 |
||||
|
100 |
75 |
100 |
||||
|
200 |
40 |
60 |
||||
|
400 |
55 |
0 |
||||
The % degradation of MCPs by pre-acclimated sludge in 6 hours.
mg/L |
2 MCP |
3 MCP |
4 MCP |
1 |
100 |
100 |
100 |
10 |
97 |
40 |
80 |
100 |
20 |
0 |
16 |
from Reference 440. 1 mg/L 2 MCP is 100% degraded in 3 hours.
The % degradation of Chlorophenols by pre-acclimated sludge.
mg/L |
2,4-DCP
|
2,4-DCP
|
2,5-DCP
|
2,4,6-TCP
|
2,4,6-TCP
|
PCP
|
50 |
80 |
- |
- |
- |
- |
- |
100 |
75 |
100 |
52 |
70 |
- |
0 |
200 |
40 |
- |
- |
- |
- |
- |
300 |
- |
- |
- |
- |
95 |
- |
400 |
55 |
- |
- |
- |
- |
- |
from References 184, 473 and 536.
Aerobic Degradation of an initial concentration of 100 mg/L of
Chlorophenols in the Soil (from reference 18).
| Chlorophenol Congeners |
Sterile Soil |
Non-Sterile Soil | ||
|
% breakdown |
days |
% breakdown |
days | |
|
2-MCP |
67 |
40 |
70 |
0.5-1.0 |
|
3-MCP |
31 |
160 |
70 |
80-160 |
|
4-MCP |
5 |
20 |
70 |
1-2 |
| 2,4-DCP | 31 | 40 | 70 | 7-20 |