Sherif H. Abd-Alrahman, Z.H. Zidan, M.I. Abdel-Megeed, Monir M. Almaz, Sobhy M. Yakout,
Kinetics and Thermodynamic Photodegradation of the
Insecticide Fenitrothion from Water,
Journal of Animal and Veterinary Advances,
Volume 12,Issue 6,
2013,
Pages 760-765,
ISSN 1680-5593,
javaa.2013.760.765,
(https://makhillpublications.co/view-article.php?doi=javaa.2013.760.765)
Abstract: In order to study organophosphorus pesticides dissipation
rates under abiotic conditions, researchers showed laboratory observations on
the fenitrothion photodegradation and its temperature dependence. The kinetics
and thermodynamic of fenitrothion were studied at temperature range 20-50°C
under the irradiation of ultraviolet light. The results showed that photochemical
reaction of fenitrothion in organic solvents such as acetone under UV light
could be well described by the first kinetic equation and the photodegradation
efficiency increases with increasing temperature in the range 20-50°C. The
photodegradation rate constant of fenitrothion were 0.01, 0.03, 0.08 and 0.38
h-1 and the corresponding half-lives were 31.6, 29.4, 9.6 and 7.8
h at 20, 30, 40, 50°C, respectively. The apparent activation energy was
calculated to be 10.9 kJ mol-1. Thermodynamic parameters of activation
were also assessed for the degradation process.
Keywords: Thermodynamic;photodegradation;insecticide;fenitrothion;UV light