We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Enhanced degradation of nitrobenzene by combined ultrasonic irradiation and a zero-valent zinc catalyst.
- Authors
Chong, Shan; Zhao, He; Zhang, Guangming; Song, Yali
- Abstract
Enhanced ultrasonic catalytic activity in nitrobenzene degradation was found by combining ultrasonic irradiation and a zero-valent zinc (Zn0) catalyst. In this system, the influence of the reaction parameters, reaction kinetics, intermediates, and mechanism was investigated. Under the optimum conditions (initial nitrobenzene concentration of 0.01 mmol/L, Zn0dosage of 0.4 g/L, initial pH 7, ultrasonic intensity 4.0 W/cm2), approximately 91.2% of nitrobenzene could be removed within 30 min. The degradation process followed the pseudo-first-order kinetics model, and the reaction rate constant was 0.0670 min−1. The mechanism of the synergetic effect of ultrasound and Zn0was proposed. Three intermediates of nitrophenol, phenylhydroxylamine, and aniline were identified by liquid chromatography–mass spectrometry (LC-MS). The degradation pathways of hydroxyl radical oxidation and Zn0reduction were deduced. This combined system is promising for the removal of nitrobenzene pollutants from water.
- Subjects
NITROBENZENE reduction; ULTRASONICS; IRRADIATION; ZINC catalysts; ZERO-valent iron; CHEMICAL decomposition
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 50, p23856
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2016.1138887