Catalytic dechlorination of p-NCB in water by nanoscale Ni/Fe

Catalytic dechlorination of para-nitrochlorobenzene ( p-NCB) by Ni/Fe (nickel/iron) bimetallic nanoparticles was carried out. The catalytic reduction and dechlorination reaction was believed to take place on the surface site of the nanoscale catalysts. In the reaction, Ni plays a role of catalyst de...

Full description

Saved in:

Bibliographic Details
Published in:	Desalination 2009-06, Vol.242 (1), p.346-354
Main Authors:	Xu, Xinhua, Wo, Jingjing, Zhang, Jinghui, Wu, Yanjun, Liu, Yong
Format:	Article
Language:	eng
Subjects:	Applied sciences Catalysis Catalytic dechlorination Catalytic reactions Chemical engineering Chemistry Exact sciences and technology General and physical chemistry General purification processes Groundwaters Nanoparticle Natural water pollution Ni/Fe Para-nitrochlorobenzene Pollution Reactors Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Wastewaters Water treatment and pollution
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Catalytic dechlorination of para-nitrochlorobenzene ( p-NCB) by Ni/Fe (nickel/iron) bimetallic nanoparticles was carried out. The catalytic reduction and dechlorination reaction was believed to take place on the surface site of the nanoscale catalysts. In the reaction, Ni plays a role of catalyst decreasing activation energy of hydrogenolysis of C–Cl bonds and the Fe was corroded to produce hydrogen gas. 100% dechlorination efficiency was achieved for particles with 2.0% Ni, in contrast, just 51% chlorine was obtained for particles with 0.5% Ni at the Ni/Fe nanoparticles mass concentration of 6 g l −1 used after 300 min reaction. The p-NCB was first adsorbed by nanoparticles completely then quickly reduced to p-chloroaniline ( p-CAN) and aniline (AN), and p-CAN was detected as an intermediate. As expected, with the Ni/Fe addition and the Ni loading percentage over Fe increasing, the temperature going up, and the pH decreasing, the dechlorination efficiency increased. The Ni/Fe catalytic reductants showed prominent activity to the reductive catalytic dechlorination of p-NCB at ambient temperature and pressure as well as high removal efficiency of p-NCB and p-CAN in agricultural pesticide wastewater, therefore, they could be good choices for remediation of contaminated groundwater.
ISSN:	0011-9164 1873-4464