Degradation of chlorinated phenols by nanoscale
zero-valent iron

doi:10.1007/s11783-008-0009-9

Front.Environ.Sci.Eng.

2008, Vol. 2

Issue (1) : 103-108 https://doi.org/10.1007/s11783-008-0009-9

Degradation of chlorinated phenols by nanoscale zero-valent iron

CHENG Rong¹, WANG Jianlong¹, ZHANG Weixian²

1.Institute of Nuclear and New Energy Technology, Tsinghua University; 2.Department of Civil and Environmental Engineering, Lehigh University

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Abstract Chlorophenols (CPs), as important contaminants in groundwater, are toxic and difficult to biodegrade. Recently nanoscale zero-valent iron received a great deal of attention because of its excellent performance in treating recalcitrant compounds. In this study, nanoscale zero-valent iron particles were prepared using chemical reduction, and the reductive transformations of three kinds of chlorinated phenols (2-CP, 3-CP, and 4-CP) by nanoscale zero-valent iron under different conditions were investigated. The transformation process of the CPs was shown to be dechlorination first, then cleavage of the benzene ring. The removal efficiency of the CPs varied as follows: 2-CP > 3-CP > 4-CP. The reactivity of CPs was associated with their energy of lowest unoccupied molecular orbit (E_LUMO). With the increase in initial concentrations of CPs, removal efficiency decreased a little. But the quantities of CPs reduced increased evidently. Temperature had influence on not only the removal efficiency, but also the transformation pathway. At higher temperatures, dechlorination occurred prior to benzene ring cleavage. At lower temperatures, however, the oxidation product was formed more easily.

Issue Date: 05 March 2008

Cite this article:

CHENG Rong,WANG Jianlong,ZHANG Weixian. Degradation of chlorinated phenols by nanoscale zero-valent iron[J]. Front.Environ.Sci.Eng., 2008, 2(1): 103-108.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-008-0009-9
https://academic.hep.com.cn/fese/EN/Y2008/V2/I1/103

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