Wastewater treatment using hybrid treatment schemes based on cavitation and Fenton chemistry: A review

被引:341
作者
Bagal, Manisha V. [1 ]
Gogate, Parag R. [1 ]
机构
[1] Inst Chem Technol, Dept Chem Engn, Bombay 40019, Maharashtra, India
关键词
Acoustic cavitation; Hydrodynamic cavitation; Fenton chemistry; Advanced Fenton process; Hybrid treatment; ADVANCED OXIDATION PROCESSES; REACTIVE BRILLIANT RED; ACID ORANGE 7; HYDRODYNAMIC CAVITATION; AQUEOUS-SOLUTION; SONOCHEMICAL DEGRADATION; SONOLYTIC DEGRADATION; RHODAMINE-B; IMPERATIVE TECHNOLOGIES; ULTRASONIC DEGRADATION;
D O I
10.1016/j.ultsonch.2013.07.009
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Advanced oxidation processes such as cavitation and Fenton chemistry have shown considerable promise for wastewater treatment applications due to the ease of operation and simple reactor design. In this review, hybrid methods based on cavitation coupled with Fenton process for the treatment of wastewater have been discussed. The basics of individual processes (Acoustic cavitation, Hydrodynamic cavitation, Fenton chemistry) have been discussed initially highlighting the need for combined processes. The different types of reactors used for the combined processes have been discussed with some recommendations for large scale operation. The effects of important operating parameters such as solution temperature, initial pH, initial pollutant concentration and Fenton's reagent dosage have been discussed with guidelines for selection of optimum parameters. The optimization of power density is necessary for ultrasonic processes (US) and combined processes (US/Fenton) whereas the inlet pressure needs to be optimized in the case of Hydrodynamic cavitation (HC) based processes. An overview of different pollutants degraded under optimized conditions using HC/Fenton and US/Fenton process with comparison with individual processes have been presented. It has been observed that the main mechanism for the synergy of the combined process depends on the generation of additional hydroxyl radicals and its proper utilization for the degradation of the pollutant, which is strongly dependent on the loading of hydrogen peroxide. Overall, efficient wastewater treatment with high degree of energy efficiency can be achieved using combined process operating under optimized conditions, as compared to the individual process. (C) 2013 Elsevier B.V. All rights reserved.
引用
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页码:1 / 14
页数:14
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