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Details van artikel 2 van 6 gevonden artikelen
| Titel: |
Assessment of the physico-chemical properties of Phytolacca dodecandra (Endod-S) and niclosamide under laboratory and field conditions |
| Auteur: |
Monkiedje, A. Englande, A. J. Wall, James H. |
| Verschenen in: |
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes |
| Paginering: | Jaargang 30 (1995) nr. 1 pagina's 73-94 |
| Jaar: |
1995 |
| Inhoud: |
The fate of Phytolacca dodecandra (Endod-S) and Niclosamide in aquatic systems was investigated both under laboratory and field conditions. Endod-S was observed more soluble in water (12,937.7 mg/1 @ 30°C) than Niclosamide (19.4 mg/1 @ 30°C). The octanol/water partition coefficients (K0W) of Endod-S and Niclosamide were 0.165 and 5.880×104 respectively. Adsorption isotherm studies indicated that the Freundlich parameters (K, n) for Endod-S were 1.60×10-6 and 0.43 respectively for powdered activated carbon (PAC), and 3.69×10-12 and 0.24 respectively for silt loam soil. Similar parameters for Niclosamide were 0.02 and 4.93 respectively for PAC, and 9.85×10-5 and 2.81 respectively for the same soil. The adsorption coefficient (Koc) for Endod-S and Niclosamide was 1.60×10-6 and 0.02 respectively for PAC, and 1.62×10-10 and 4.34×10-3 respectively for silt loam soil. Hydrolysis of both molluscicides occurred in distilled water buffered at pH above 7. No photolysis of Endod-S and Niclosamide was observed in water after exposure to longwave UV light for 4 hr. Similarly, neither chemical volatilized from water following 5 hr of sample aeration. Under field conditions, Endod-S persisted in ponds for 4 to 5 days, and Niclosamide for over 14 days. The half-lives of Endod-S and Niclosamide were 1.51 and 3.40 days respectively. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 6 gevonden artikelen
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