Journal Home Online First Current Issue Archive For Authors Journal Information 中文版

Frontiers of Environmental Science & Engineering >> 2012, Volume 6, Issue 4 doi: 10.1007/s11783-012-0395-x

Degradation of trace nitrobenzene in water by microwave-enhanced H

1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; 2. Guangxi Polytechnic of Construction, Nanning 530003, China

Available online: 2012-08-01

Next Previous

Abstract

To evaluate possible use of microwave-enhanced H O -based (MW/H O ) process to degrade trace nitrobenzene (NB) in water, a series of batch experiments were conducted. The results showed that 2450MHz microwave irradiation significantly enhanced oxidative decomposition of nitrobenzene (NB) in a H O system. About 90% NB was degraded by the MW/ H O process in 30 min. Moreover, the MW/ H O process could enhanced the oxidative degradation of NB even at relatively low temperature (50°C). When the initial concentration of NB was 300μg/L, the optimum ratio of H O to NB and MW power were 70 and 300 W respectively. The presence of humic acid significantly increased H O dosage. The ultraviolet absorbance at 254 nm (UV ) indicated degradation of NB was stepwise and some intermediates were produced. The gas chromatography-mass spectrometric (GC-MS) analysis showed that main intermediates were nitrophenolic and carbonyl compounds.

Related Research