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Details van artikel 11 van 24 gevonden artikelen
| Titel: |
Dissipation and degradation of DDT, DDE and parathion in Brazilian soils |
| Auteur: |
Andrea, M. M. Luchini, L. C. Mello, M. H. S. H. Tomita, R. Y. Mesquita, T. B. Musumeci, M. R. |
| Verschenen in: |
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes |
| Paginering: | Jaargang 29 (1994) nr. 1 pagina's 121-132 |
| Jaar: |
1994 |
| Inhoud: |
The persistence of 14C-DDT was monitored in the field at two sites representing tropical and subtropical climates in Sao Paulo State. Persistence of 14C-DDE and 14C-parathion was also studied in the subtropical region. In the extracts of soils treated with DDT, the main product was DDT. The amount of DDE was small and reached a maximum of 16% of the extractable radioactivity after 16 weeks, while DDD was detected only after 48 weeks. Bound 14C-residues increased slowly and amounted to about 10% after 48 weeks. Extracts from 14C-DDE-treated soils contained only DDE after 48 weeks. I4C-DDT dissipated with a half-life of over 200 weeks in both regions while 14C-DDE dissipated at a faster rate (Tl/2 = 88 weeks). It seems likely that the long persistence of DDT in this study relates to the acidic nature of the soil. Parathion dissipated much faster and, the degradation products paraoxon and 4-nitrophenol, were identified after short periods. Bound residues increased with time to about 30% after 6 weeks, and remained almost constant. The half-life for 14C-parathion dissipation was 12 weeks. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 24 gevonden artikelen
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