Assessment of the physico‐chemical properties of Phytolacca dodecandra (Endod‐S) and niclosamide under laboratory and field conditions
Abstract 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 observe...