02386nas a2200265 4500008004100000022001400041245013800055210006900193260007300262300001200335490000800347520139300355653003301748653002801781653001701809653002701826653001201853100002401865700002901889700001901918700002201937700001801959700002201977856012101999 2013 eng d a0304-389400aSynergetic effect of combination of AOP's (hydrodynamic cavitation and H2O2) on the degradation of neonicotinoid class of insecticide0 aSynergetic effect of combination of AOPs hydrodynamic cavitation aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT a139-1470 v2613 a

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.

10aAdvanced oxidation processes10aHydrodynamic cavitation10aImidacloprid10aSynergetic coefficient10aVenturi1 aRaut-Jadhav, Sunita1 aSaharan, Virendra, Kumar1 aPinjari, Dipak1 aSonawane, Shirish1 aSaini, Daulat1 aPandit, Aniruddha uhttps://library.ncl.res.in/content/synergetic-effect-combination-aops-hydrodynamic-cavitation-and-h2o2-degradation-002572nas 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

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.

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

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.

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-ultrasonic02597nas a2200277 4500008004100000022001400041245015200055210006900207260006900276300001200345490000800357520155100365653002701916653002801943653002201971653003401993653001002027653001202037100002402049700002202073700002302095700002202118700002602140700002602166856012702192 2016 eng d a1385-894700aTreatment of the pesticide industry effluent using hydrodynamic cavitation and its combination with process intensifying additives (H2O2 and ozone)0 aTreatment of the pesticide industry effluent using hydrodynamic  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUL a326-3350 v2953 a

Hydrodynamic cavitation (HC) and its combination with H2O2 and ozone have been applied in the present work for the treatment of industrial pesticide effluent. Initially, the effect of dilution of the effluent on the efficacy of hydrodynamic cavitation has been studied using circular venturi as a cavitator. Although an increase in the extent of dilution has not shown any beneficial effect on the actual moles of pollutant degraded, hybrid processes have been studied using 1:5 dilution due to very high TDS content of the effluent. Treatment of the industrial pesticide effluent using HC + ozone (3 gbh) process has demonstrated that the biodegradability index (BI) of the effluent increases from 0.123 to 0.324 after 2 h of operation. The rate of COD and TOC reduction has also increased by many folds by using HC in combination with ozone. In addition this, the treatment of industrial pesticide effluent using HC + H2O2 has also indicated that the rate of COD and TOC reduction increases significantly by using HC in combination with various loadings of H2O2. The study of interference of added H2O2 on the COD analysis has exhibited that the COD equivalence is 0.441 mg/L for 1 mg/L of H2O2. The energy efficiency and operating cost of various hybrid processes have been compared based on the cavitational yield and the cost of electricity. The combined process of HC and H2O2 has observed to be the most cost-effective one due to its higher cavitational yield and lower power consumption. (C) 2016 Elsevier B.V. All rights reserved.

10aBiodegradability index10aHydrodynamic cavitation10aHydrogen peroxide10aIndustrial pesticide effluent10aOzone10aVenturi1 aRaut-Jadhav, Sunita1 aBadve, Mandar, P.1 aPinjari, Dipak, V.1 aSaini, Daulat, R.1 aSonawane, Shirish, H.1 aPandit, Aniruddha, B. uhttps://library.ncl.res.in/content/treatment-pesticide-industry-effluent-using-hydrodynamic-cavitation-and-its-combination