title: Synergetic effect of combination of AOP's (hydrodynamic cavitation and H₂O₂) on the degradation of neonicotinoid class of insecticide.
abstract: In the present work, degradation of imidacloprid (neonicotinoid class of insecticide) in aqueous solution has been systematically investigated using hydrodynamic cavitation and combination of hydrodynamic cavitation (HC) and H2O2. Initially, effect of different operating parameters such as inlet pressure to the cavitating device (5-20 bar) and operating pH (2-7.5) has been investigated. Optimization of process parameters was followed by the study of effect of combination of HC and H2O2 process on the rate of degradation of imidacloprid. Significant enhancement in the rate of degradation of imidacloprid has been observed using HC+H2O2 process which lead to a complete degradation of imidacloprid in 45 min of operation using optimal molar ratio of imidacloprid:H2O2 as 1:40. Substantial synergetic effect has been observed using HC+H2O2 process which confer the synergetic coefficient of 22.79. An attempt has been made to investigate and compare the energy efficiency and extent of mineralization of individual and combined processes applied in the present work. Identification of the byproducts formed during degradation of imidacloprid has also been done using LC-MS analysis. The present work has established a fact that hydrodynamic cavitation in combination with H2O2 can be effectively used for degradation of imidacloprid.
authors.affiliation: Vishwakarma Institute of Technology, Pune 411037, India.
authors.forename: Sunita
authors.initials: S
authors.lastname: Raut-Jadhav
authors.forename: Virendra Kumar
authors.initials: VK
authors.lastname: Saharan
authors.forename: Dipak
authors.initials: D
authors.lastname: Pinjari
authors.forename: Shirish
authors.initials: S
authors.lastname: Sonawane
authors.forename: Daulat
authors.initials: D
authors.lastname: Saini
authors.forename: Aniruddha
authors.initials: A
authors.lastname: Pandit
mesh_terms: D057446:Hydrodynamics; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D007306:Insecticides / Q000737:chemistry*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D014874:Water Pollutants, Chemical; C082359:imidacloprid; D006861:Hydrogen Peroxide
keywords: Advanced oxidation processes; Hydrodynamic cavitation; Imidacloprid; Synergetic coefficient; Venturi