TABLE 2.
CHM degradation products observed with enrichment cultures at 18 days
| Enrichment Culture | Concn (μM) ofa:
|
|||
|---|---|---|---|---|
| TCMP | TCHQ | TriCHQ | 2,5-DCHQ | |
| Estuarine | ||||
| With TCDB | <5-20 (2/3) | <5-50 (2/3) | <5 | <5 |
| With TCMP | 10-100 (4/4) | 10-30 (4/4) | <5-5 (1/4) | |
| With TCHQ | <5-20 (2/4) | <5-20 (2/4) | ||
| Freshwater | ||||
| With TCDB | 10-20 (3/3) | 10 (3/3) | <5 | <5 |
| With TCMP | 10-50 (3/3) | <5 | <5 | |
| With TCHQ | <5-40 (3/4) | 10-150 (3/4) | ||
a
Enrichment culture data are summarized for three or four enrichment cultures transferred sequentially and grown with one of the three CHMs. The number of sequential transfer enrichment cultures in which the compound was detected is in parentheses. Similar results were observed in replicate experiments. The detection limit was less than 5 μM.