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

Raut-Jadhav, Sunita; Saharan, Virendra Kumar; Pinjari, Dipak V.; Sonawane, Shirish H.; Saini, D. R.; Pandit, Aniruddha B.

doi:10.1016/j.jhazmat.2013.07.012

Cited by 134 publications

(51 citation statements)

References 35 publications

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“…It is well reported in the literature that the initial pH of the solution plays an important role in the degradation of many organic pollutants using cavitational reactors [14][15]. With this background, the effect of pH has been studied by carrying out the experiments at different pH in the range of 2 to 6.…”

Section: Effect Of Operating Phmentioning

confidence: 99%

“…Because at very high inlet pressure (i.e. at very low cavitation number), the number of cavities generated are so high, that they no longer behave as individual cavities and forms a vaporous cavity cloud resulting into the less intense cavitation phenomena [14]. Saharan et al [19] have observed that the optimal cavitation number is dependent on the geometry of the cavitating device and the reported range of optimal cavitation number for circular venturi of similar dimensions is 0.13-0.18.…”

Section: Effect Of Inlet Pressure and Cavitation Numbermentioning

confidence: 99%

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Effect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution

Raut-Jadhav¹,

Saini

Sonawane

et al. 2016

Ultrasonics Sonochemistry

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Methomyl, a carbamate pesticide, is classified as a pesticide of category-1 toxicity and hence shows harmful effects on both human and aquatic life. In the present work, the degradation of methomyl has been studied by using hydrodynamic cavitation reactor (HC) and its combination with intensifying agents such as H2O2, fenton reagent and ozone (hybrid processes). Initially, the optimization of operating parameters such pH and inlet pressure to the cavitating device (circular venturi) has been carried out for maximizing the efficacy of hydrodynamic cavitation. Further degradation study of methomyl by the application of hybrid processes was carried out at an optimal pH of 2.5 and the optimal inlet pressure of 5 bar. Significant synergetic effect has been observed in case of all the hybrid processes studied. Synergetic coefficient of 5.8, 13.41 and 47.6 has been obtained by combining hydrodynamic cavitation with H2O2, fenton process and ozone respectively. Efficacy of individual and hybrid processes has also been obtained in terms of energy efficiency and extent of mineralization. HC+Ozone process has proved to be the most effective process having highest synergetic coefficient, energy efficiency and the extent of mineralization. The study has also encompassed the identification of intermediate by-products generated during the degradation and has proposed the probable degradation pathway. It has been conclusively established that hydrodynamic cavitation in the presence of intensifying agents can effectively be used for complete degradation of methomyl.

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Section: Effect Of Operating Phmentioning

confidence: 99%

Section: Effect Of Inlet Pressure and Cavitation Numbermentioning

confidence: 99%

Effect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution

Raut-Jadhav¹,

Saini

Sonawane

et al. 2016

Ultrasonics Sonochemistry

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“…The synergistic effect was due to the increased generation of HO • and www.soci.org C Balcik-Canbolat et al regeneration of Fe 2+ . 29 The synergetic index based on the reaction rate constant for Fenton-HC can be obtained as 29,30 Synergetic index = k Fenton+HC k HC + k Fenton = 2.34…”

Section: Fenton Enhanced Hc Processmentioning

confidence: 99%

“…Free radicals are generated in the reactor due to the dissociation of vapors trapped in the cavitating bubbles . HC has been used in different applications including water treatment and disinfection, sewage treatment, industrial wastewaters treatments, leachate treatment, sludge digestion, degradation of organic compounds, decomposition of persistent organic pollutants, flotation and chemical synthesis …”

Section: Introductionmentioning

confidence: 99%

Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process

Balcik‐Canbolat

Sakar

Karagündüz

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND Biological treatment processes are often ineffective for the treatment of medium density fiberboard (MDF) wastewater due the presence of non‐biodegradable and refractory compounds. Fenton and Fenton enhanced hydrodynamic cavitation (HC) processes may be cost effective solutions for the treatment of such wastewater. RESULTS Removals of COD, formaldehyde and color by Fenton and Fenton enhanced HC processes were investigated in this study. The optimum H2O2/Fe2+ molar ratio at the initial pH of 3 for the optimum COD removal efficiency was 2.5/1 in 70 min reaction time. Furthermore, faster removal rates of pollutants were also observed with HC enhanced Fenton process. The presence of various herbicides and fungicides in the wastewater were detected by gas chromatography/mass spectrometry (GC/MS). CONCLUSIONS The Fenton enhanced process resulted in faster COD removal rates than those obtained in Fenton alone. The Fenton enhanced HC process appears to be a cost‐effective alternative for the treatment of highly toxic and non‐biodegradable MDF wastewater. © 2016 Society of Chemical Industry

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“…In addition, the degradation efficiency of hydrodynamic cavitation reactors can improve through the use of oxidants such as H 2 O 2 (SAHARAN et al, 2011), CCl 4 (CHAKINALA et al, 2008) and O 3 (ČEHOVIN et al, 2017). According to Raut-Jadhav et al (2013), the combination between hydrodynamic cavitation and oxidants generates more reactive species, reduces mass transfer resistance and increases the turbulence generated during cavitation.…”

Section: Introductionmentioning

confidence: 99%

COD removal from sucrose solution using hydrodynamic cavitation and hydrogen peroxide: a comparison between Venturi device and orifice plate

Alves

Silva

Ferreira

et al. 2019

RBRH

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The aim of the current study is to compare the chemical oxygen demand (COD) removal efficiency of a Venturi device to that of an orifice plate. The inlet pressure in the devices was optimized and the degradation kinetics was analyzed. In addition, the synergistic effect resulting from the combination between cavitation and H2O2 was investigated. An experimental apparatus was built to achieve these goals. A sucrose solution and an effluent from a sucrose-based soft drink industry were treated. Results showed that the Venturi device recorded 90% COD removal efficiency after three treatment minutes. On the other hand, the orifice plate recorded 90% COD removal efficiency after 9 min. The degradation kinetics-reaction order was 3.5, except for the highest Venturi inlet pressure (7.3 bar), which led to coalescence of cavities and to reduced degradation rate. The synergistic coefficient (Sc) was 185.20 and showed that the hybrid process (HC + H2O2) was much more efficient than the cavitation process applied alone. The high COD concentration in the effluent generated by the soft drink industry (2,512.8 mg L-1) was significantly decreased by 72%. The combined use of cavitation and Venturi has significant potential to remove high organic matter concentrations in short treatment periods.

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

Cited by 134 publications

References 35 publications

Effect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution

Effect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution

Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process

COD removal from sucrose solution using hydrodynamic cavitation and hydrogen peroxide: a comparison between Venturi device and orifice plate

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