Reductive degradation of nitrobenzene in aqueous solution by zero-valent iron.
The reductive degradation of nitrobenzene (NB) by zero-valent iron was investigated. Experimental results showed that the degradation of NB was influenced by pH and NB concentration. The optimum pH value was found to be 3.0 for the reductive degradation of NB in the tested pH ranges of 3.0-12.0. The formation rate of aniline, a major reductive product of NB, followed zero-order kinetics at various pH levels. Furthermore, GC/MS analysis showed that aniline, azobenzene and azoxybenzene were the reductive products of NB by zero-valent iron. With the analysis of the products with GC/MS and FTIR, possible reductive pathways of NB by zero-valent iron were suggested.
Mu
Yang
Y
Department of Chemistry, University of Science and Technology of China, Lab of Environmental Engineering, Hefei, Anhui 230026, China.
Yu
Han-Qing
HQ
Zheng
Jia-Chuan
JC
Zhang
Shu-Juan
SJ
Sheng
Guo-Ping
GP
D000814:Aniline Compounds / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D009578:Nitrobenzenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D017550:Spectroscopy, Fourier Transform Infrared
D000814:Aniline Compounds; D001391:Azo Compounds; D009578:Nitrobenzenes; D007501:Iron; C036077:nitrobenzene; C009850:azobenzene; C023650:aniline; C046115:fenazox