Patil Amar L, Patil Pankaj N, Gogate Parag R
Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
Ultrason Sonochem. 2014 Sep;21(5):1778-86. doi: 10.1016/j.ultsonch.2014.02.029. Epub 2014 Mar 12.
The present work deals with application of sonochemical reactors for the treatment of imidacloprid containing wastewaters either individually or in combination with other advanced oxidation processes. Experiments have been performed using two different configurations of sonochemical reactors viz. ultrasonic horn (20 kHz frequency and rated power of 240 W) and ultrasonic bath equipped with radially vibrating horn (25 kHz frequency and 1 kW rated power). The work also investigates the effect of addition of process intensifying agents such as H2O2 and CuO, which can enhance the production of free radicals in the system. The combination studies with advanced oxidation process involve the advanced Fenton process and combination of ultrasound with UV based oxidation. The extent of degradation obtained using combination of US and H2O2 at optimum loading of H2O2 was found to be 92.7% whereas 96.5% degradation of imidacloprid was achieved using the combination of US and advanced Fenton process. The process involving the combination of US, UV and H2O2 was found to be the best treatment approach where complete degradation of imidacloprid was obtained with 79% TOC removal. It has been established that the use of cavitation in combination with different oxidation processes can be effectively used for the treatment of imidacloprid containing wastewater.
本研究涉及声化学反应器在单独处理含吡虫啉废水或与其他高级氧化工艺联合处理含吡虫啉废水方面的应用。实验使用了两种不同配置的声化学反应器，即超声换能器（频率20kHz，额定功率240W）和配备径向振动换能器的超声浴（频率25kHz，额定功率1kW）。该研究还考察了添加诸如H2O2和CuO等过程强化剂的效果，这些强化剂可增强体系中自由基的产生。与高级氧化工艺的联合研究包括高级芬顿工艺以及超声与基于UV的氧化的联合。发现在H2O2最佳投加量下，超声与H2O2联合使用时吡虫啉的降解率为92.7%，而超声与高级芬顿工艺联合使用时吡虫啉的降解率达到96.5%。超声、UV和H2O2联合的工艺被认为是最佳处理方法，该方法可实现吡虫啉的完全降解，TOC去除率达79%。已证实，空化与不同氧化工艺联合使用可有效用于处理含吡虫啉废水。
