|
| Table
1. Results obtained in the single substrate biodegradation experiments
with the different phenolic compounds for COD reduction (%), pH and
ecotoxicity (EC50-5
min. (%). (The values are the arithmetic mean of at least two independent
analyses). |
|
Gallic acid |
Protocate-chuic acid |
Vanillic acid |
Syringic acid |
Caffeic acid |
Ferulic acid |
Syringic aldehyde |
|
COD reduction (%) |
|||||||
|
6 hours |
68.6 |
86.9 |
86.2 |
30.6 |
83.3 |
51.1 |
16.0 |
|
Final |
67.1 |
83.6 |
81.0 |
79.6 |
81.5 |
77.9 |
59.5 |
|
|
pH |
||||||
|
Initial |
3.8 |
4.0 |
3.7 |
3.9 |
4.1 |
3.9 |
4.4 |
|
Final |
4.8 |
5.1 |
5.7 |
5.5 |
5.5 |
5.3 |
4.9 |
|
EC50-5 min (%) |
|||||||
|
Initial |
8.6 |
4.9 |
7.3 |
8.1 |
11.7 |
5.3 |
11.2 |
|
Final |
27.4 |
42.0 |
45.9 |
53.3 |
48.9 |
26.5 |
27.5 |
| |