Kinetics and Mechanism of Dechlorination of o-Chlorophenol by Nanoscale Pd/Fe

Chemical Research in Chinese Universities ›› 2004, Vol. 20 ›› Issue (1): 73-76.

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Kinetics and Mechanism of Dechlorination of o-Chlorophenol by Nanoscale Pd/Fe

WEI Jian-jun, XU Xin-hua, LIU Yong

Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, P. R. China

Received:2003-05-25 Online:2004-02-24 Published:2011-08-06
Supported by:
Supported by the Returnee Foundation Ministry of Education(No.[2002]247).

Abstract

Abstract: Nanoscale Pd/Fe bimetallic particles were synthesized with an efficient method to dechlorinate o-chlorophenol. The nanoscale Pd/Fe particles were determined by transmission electron microscopy and BET specific surface area analysis. Most of the particles are in the size range of 20-100 nm. The BET specific surface area of synthesized nanoscale Pd/Fe particles is 12.4 m²/g. In contrast, a commercially available fine iron powder(<100 mesh) has a specific surface area of 0.49 m²/g. Batch studies demonstrated that the nanoscale particles can effectively dechlorinate o-chlorophenol. The dechlorination reaction takes place on the surface of synthesized nanoscale Pd/Fe bimetallic particles in a pseudo-first order reaction. The surface-area-normalized rate coefficients(k_SA) are comparable to those reported in the literature for chlorinated ethenes. The observed reaction rate constants(k_obs) are dominated by the mass fraction of Pd and the mass concentration of the nanoscale Pd/Fe particles.

Key words: Nanoscale Pd/Fe, Dechlorination, o-Chlorophenol, Kinetics, Mechanism

WEI Jian-jun, XU Xin-hua, LIU Yong. Kinetics and Mechanism of Dechlorination of o-Chlorophenol by Nanoscale Pd/Fe[J]. Chemical Research in Chinese Universities, 2004, 20(1): 73-76.

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Kinetics and Mechanism of Dechlorination of o-Chlorophenol by Nanoscale Pd/Fe

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