02572nas a2200241   4500008004100000022001400041245015400055210006900209260007300278300001200351490000700363520163200370653004002002653002802042653001302070653002702083653001202110100002402122700001802146700002202164700002202186856012202208       2016                        eng d  a1350-417700aEffect of process intensifying parameters on the hydrodynamic cavitation based degradation of commercial pesticide (methomyl) in the aqueous solution0 aEffect of process intensifying parameters on the hydrodynamic ca  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a283-2930 v283 a<p>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. (C) 2015 Elsevier B.V. All rights reserved.</p>10aAdvanced Oxidation Processes (AOPs)10aHydrodynamic cavitation10aMethomyl10aSynergetic coefficient10aVenturi1 aRaut-Jadhav, Sunita1 aSaini, Daulat1 aSonawane, Shirish1 aPandit, Aniruddha  uhttps://library.ncl.res.in/content/effect-process-intensifying-parameters-hydrodynamic-cavitation-based-degradation-002304nas a2200265   4500008004100000022001400041245016000055210006900215260007300284300001200357490000700369520129300376653001101669653002201680653001301702653001701715653002801732653002601760100002401786700002301810700002201833700002601855700002601881856013101907       2016                        eng d  a1350-417700aIntensification of degradation of methomyl (carbamate group pesticide) by using the combination of ultrasonic cavitation and process intensifying additives0 aIntensification of degradation of methomyl carbamate group pesti  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a135-1420 v313 a<p>In the present work, the degradation of methomyl has been carried out by using the ultrasound cavitation (US) and its combination with H2O2, Fenton and photo-Fenton process. The study of effect of operating pH and ultrasound power density has indicated that maximum extent of degradation of 28.57% could be obtained at the optimal pH of 2.5 and power density of 0.155 W/mL. Application of US in combination with H2O2, Fenton and photo-Fenton process has further accelerated the rate of degradation of methomyl with complete degradation of methomyl in 27 min, 18 min and 9 min respectively. Mineralization study has proved that a combination of US and photo -Fenton process is the most effective process with maximum extent of mineralization of 78.8%. Comparison of energy efficiency and cost effectiveness of various processes has indicated that the electrical cost of 79892.34 Rs./m(3) for ultrasonic degradation of methomyl has drastically reduced to 2277.00 Rs./m(3), 1518.00 Rs./m(3) and 807.58 Rs./m(3) by using US in combination with H2O2, Fenton and photo-Fenton process respectively. The cost analysis has also indicated that the combination of US and photo-Fenton process is the most energy efficient and cost effective process. (C) 2015 Elsevier B.V. All rights reserved.</p>10aFenton10aHydrogen peroxide10aMethomyl10aPhoto-Fenton10aSynergistic coefficient10aUltrasound cavitation1 aRaut-Jadhav, Sunita1 aPinjari, Dipak, V.1 aSaini, Daulat, R.1 aSonawane, Shirish, H.1 aPandit, Aniruddha, B.  uhttps://library.ncl.res.in/content/intensification-degradation-methomyl-carbamate-group-pesticide-using-combination-ultrasonic