Optimization of operational parameters by Taguchi design for imidacloprid oxidation by microwave-activated persulfate


GENÇ N. , DURNA E.

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY, cilt.37, ss.1632-1637, 2018 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 37 Konu: 5
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1002/ep.12846
  • Dergi Adı: ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
  • Sayfa Sayısı: ss.1632-1637

Özet

In this study, imidacloprid oxidation by microwave-activated persulfate was investigated. Imidacloprid was exposed to microwave (MW) irradiation at different persulfate concentration, power level, contact time, and pH. Reaction between imidacloprid and sulfate radical followed the secondary order kinetic model. Taguchi's robust design approach was used to optimize the imidacloprid oxidation. Experimentation was planned as per Taguchi's L9 orthogonal array. The optimum levels of control factors for maximum imidacloprid oxidation were defined (power at 700 W, contact time at 6 min, persulfate concentration at 0.129 g/L (power density 5.42 W/g oxidant), pH at 6.5). The analysis of variance analysis shown that the the most effective control factor is power, its contribution is 69.2%. A confirmation experiment was conducted to verify the feasibility and effectiveness of the optimal combination. The observed value of S/N ((obs)=38.8) ratio is compared with that of the predicted value ((opt)=45.4). The prediction error, that is, (opt) - (obs)=6.6, is within the confidence interval (CI) value. (c) 2017 American Institute of Chemical Engineers Environ Prog, 37: 1632-1637, 2018