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| Titel: |
Degradation of methoxychlor in sediments under various redox conditions |
| Auteur: |
Muir, D. C. G. Yarechewski, A. L. |
| Verschenen in: |
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes |
| Paginering: | Jaargang 19 (1984) nr. 3 pagina's 271-295 |
| Jaar: |
1984 |
| Inhoud: |
The degradation of methoxychlor (14C-ring-labelled) was studied under laboratory conditions in Take and pond sediments (water-sediment ratio, 10-20:1) incubated under various redox conditions at 22.5 or 10°C. Methoxychlor degraded rapidly in sediments with half-lives of <28 days under nitrogen aeration (Eh < -50 mv), 49 to 55 days under static aerobic ¿onditions and 115 to 206 days in air-purged flasks (Eh 220 to 464 mv). The major degradation products were dechlorinated methoxychlor (DMDD) and mono- and dihydroxy (demethylated) derivatives of methoxychlor and DMDD. Dihydroxy- derivatives represented 15% of extractable radioactivity in pond sediments and 28% in lake sediments after 148 days of aerobic incubation. Under nitrogen aeration, mono-and dihydroxy-derivatives represented 44 to 65% of extractable 4C after 28 days incubation. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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