Raut-Jadhav Sunita, Pinjari Dipak V, Saini Daulat R, Sonawane Shirish H, Pandit Aniruddha B
Chemical Engineering Department, Bharati Vidyapeeth University College of Engineering, Pune 411043, India.
Chemical Engineering Department, Institute of Chemical Technology (ICT), Matunga, Mumbai 400019, India.
Ultrason Sonochem. 2016 Jul;31:135-42. doi: 10.1016/j.ultsonch.2015.12.015. Epub 2015 Dec 19.
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 79892.34Rs./m(3) for ultrasonic degradation of methomyl has drastically reduced to 2277.00Rs./m(3), 1518.00Rs./m(3) and 807.58Rs./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.
在本研究中，采用超声空化（US）及其与过氧化氢、芬顿和光芬顿工艺相结合的方法对灭多威进行了降解。操作pH值和超声功率密度的影响研究表明，在最佳pH值为2.5和功率密度为0.155W/mL时，降解程度最高可达28.57%。将超声与过氧化氢、芬顿和光芬顿工艺联合应用进一步加快了灭多威的降解速率，灭多威分别在27分钟、18分钟和9分钟内完全降解。矿化研究证明，超声与光芬顿工艺相结合是最有效的工艺，最大矿化程度为78.8%。各种工艺的能量效率和成本效益比较表明，灭多威超声降解的电费为79892.34卢比/立方米，通过将超声与过氧化氢、芬顿和光芬顿工艺联合应用，分别大幅降至2277.00卢比/立方米、1518.00卢比/立方米和807.58卢比/立方米。成本分析还表明，超声与光芬顿工艺相结合是最节能且成本效益最高的工艺。
