Taping into the Super Power and Magic Appeal of Ultrasound Coupled with Edta on Degradation of P-Chlorophenol by Fe0 Based Advanced Oxidation Processes
p-chlorophenol often exists in the wastewater discharged from pesticide and dye production process, which is toxic to aquatic organisms and has long-term adverse effects on water environment. Aiming at how to degrade wastewater containing p-chlorophenol, this paper employed ultrasound (US) enhanced zero-valent iron (Fe0)/EDTA/air system (FEA), namely US/FEA, to remove p-chlorophenol. This paper discussed the influence of single factor experimental conditions such as sodium EDTA concentration, Fe0 dosage, US power, pH, reaction temperature and pollutant concentration on the removal efficiency of p-chlorophenol, and determined the optimal reaction conditions. The degradation process and removal mechanism of p-chlorophenol in the US/FEA were discussed through the determination and analysis of intermediate products. Results showed that ultrasound power, PS concentration, pH and temperature have a great influence on the removal of p-chlorophenol in US/FEA reaction system. The optimum parameters for degradation of p-chlorophenol with US/FEA reaction system were determined. The degradation process and removal mechanism of p-chlorophenol in the US/FEA were discussed through the determination and analysis of intermediate products. US could continuously activate and renew the Fe0 surface, accelerate its oxidation and corrosion process, and then continuously and stably produce sufficient amounts of Fe2+ and Fe3+. It was inferred that P-chlorophenol undergoes a high-temperature pyrolysis reaction under extreme high- temperature and high-pressure environments to produce phenol radicals, and then undergo an addition reaction with ·OH to produce hydroquinone. US/FEA is a promising technology for high-efficiency degradation of organic matter and deep environmental purification
Year of publication: |
[2022]
|
---|---|
Authors: | Ding, Yi ; Chen, Minchun ; Wang, Shengzheng |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by person