Effects of ferrous ions on reduction of nitrobenzene by zero-valent iron

ACSAICHE 99123

Lei Liu, liulei97@126.com1, Jun Yin, hitjunyin@163.com2, and Liguo Zhang, zhang1li2guo3@163.com1. (1) Department of Environmental Engineering, Harbin Institute of Technology, No.202 Haihe Road, Harbin, 150090, China, (2) Department of Environmental Engineering, Jilin Architectural and Civil Engineering Institute, No. 1129 Hongqi Street, Changchun, 130021, China
Abstract: The reduction of nitrobenzene (ArNO2) was investigated in a zero-valent iron system (Fe0) with the addition of ferrous ions (Fe2+) using batch tests. The results indicated that the reductive product of nitrobenzene was not changed with the addition of Fe2+, and ArNO2 was reduced to aniline by Fe0. The reductive reaction rate of ArNO2 was apparently enhanced due to the addition of Fe2+, however, Fe2+ was not the major reducing agent. The reductive reaction can be described using a pseudo-first-order kinetic model, and the observed pseudo-first-order rate constants (kobs) increased with the increasing of Fe2+ concentration, indicating that the presence of Fe2+ accelerated the reduction of ArNO2 by Fe0.
 

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