Indian Journal of Science and Technology
DOI: 10.17485/ijst/2013/v6i1.19
Year: 2013, Volume: 6, Issue: 1, Pages: 1-6
Original Article
1,2 Mohammad Hadi Dehghani and 3 *Abdolmajid Fadaei
1 Department of Environmental Health Engineering, School of public Health,
2 Tehran University of Medical Sciences, Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER),
3 Department of Environmental Health Engineering, School of public Health, Shahrekord University of Medical Sciences, 1,2 [email protected], 3 * [email protected]
*Author For Correspondence
Abdolmajid Fadaei
Department of Environmental Health Engineering
Email: [email protected]
In this work, elimination two types of organophosphorus pesticides, diazinon and malathion spiked in aqueous solution by ultrasonic irradiation was investigated. Six different initial concentrations of diazinon and malathion (100, 300, 500, 200, 400, and 600 µg/L respectively) at different pH (3, 7, 9) and time (30, 45, 60, 90, 105 min) were investigated. Results showed that diazinon and malathion could be effectively and rapidly degraded by ultrasonic irradiation, and kinetics of both pesticides was strongly influenced by time, initial concentration and pH value. The results showed optimum condition degradation achieved at pH 3 and 9 for diazinon and malathion, respectively. Kinetic modeling applied for the obtained results showed that the degradation of diazinon and malathion by ultrasound followed first – order and second – order model.
Keywords: Ultrasonic, Pesticide, Diazinon, Malathion, Sonochemical kinetic, Aqueous solution
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