Synergetic effect of combination of AOP's (hydrodynamic cavitation and H2O2) on the degradation of neonicotinoid class of insecticide

被引:125
作者
Raut-Jadhav, Sunita [1 ]
Saharan, Virendra Kumar [2 ]
Pinjari, Dipak [3 ]
Sonawane, Shirish [4 ]
Saini, Daulat [5 ]
Pandit, Aniruddha [3 ]
机构
[1] Vishwakarma Inst Technol, Pune 411037, Maharashtra, India
[2] MNIT, Dept Chem Engn, Jaipur 302001, Rajasthan, India
[3] Inst Chem Technol, Dept Chem Engn, Mumbai 400019, Maharashtra, India
[4] NIT Warangal, Dept Chem Engn, Warangal 506004, Andhra Pradesh, India
[5] Natl Chem Lab, Pune 411008, Maharashtra, India
关键词
Hydrodynamic cavitation; Venturi; Advanced oxidation processes; Synergetic coefficient; Imidacloprid; PHOTOCATALYTIC DEGRADATION; SONOCHEMICAL DEGRADATION; PHOTO-FENTON; WATER; INTENSIFICATION; DICHLORVOS; PARAMETERS; OXIDATION; REMOVAL; TIO2;
D O I
10.1016/j.jhazmat.2013.07.012
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:139 / 147
页数:9
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