Dechlorination of 2,4-dichlorophenol by Fe/Ni nanoparticles: the pathway and the effect of pH and the Ni mass ratio

The dechlorination of 2,4-dichlorophenol (2,4-DCP) by a nanoscale Fe/Ni material was investigated at room temperature. 2,4-DCP can be removed more quickly by an Fe/Ni material with 2% Ni. Fe/Ni exhibited excellent adsorption and reduction efficiency toward 2,4-DCP in an aqueous solution over a wide...

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Bibliographic Details
Published in:Environmental technology 2023-10, Vol.44 (24), p.3676-3684
Main Authors: Liu, Lujian, Ruan, Xia, Liu, Hong, Fan, Xianyuan, Dong, Jun
Format: Article
Language:English
Subjects:
2,4-Dichlorophenol
Aqueous solutions
Chlorine
Chlorophenol
Dechlorination
degradation pathway
Fe/Ni
Iron
Nanoparticles
Nickel
Ortho-chlorophenol
p-Chlorophenol
pH effects
Phenols
Room temperature
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Summary:The dechlorination of 2,4-dichlorophenol (2,4-DCP) by a nanoscale Fe/Ni material was investigated at room temperature. 2,4-DCP can be removed more quickly by an Fe/Ni material with 2% Ni. Fe/Ni exhibited excellent adsorption and reduction efficiency toward 2,4-DCP in an aqueous solution over a wide range of pH values. The removal rate of 2,4-DCP exceeded 95% in 60 min in the pH range of 3.0-9.0, and more than 75% was dechlorinated to phenol (CA). The degradation pathway of 2,4-DCP was confirmed based on analysis of the intermediate and end products. A portion of 2,4-DCP was first dechlorinated with a chlorine atom to produce 2-chlorophenol and 4-chlorophenol, and then dechlorination was performed sequentially to form CA. The other portion of 2,4-DCP was dechlorinated to remove two chlorine atoms simultaneously to generate CA. The investigations are essential to the application of iron-based remediation technology.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2022.2068383