1. Simultaneous adsorption and dechlorination of 2,4-dichlorophenol by Pd/Fe nanoparticles with multi-walled carbon nanotube support
- Author
-
Xu, Jiang, Lv, Xiaoshu, Li, Jiadan, Li, Yingying, Shen, Liang, Zhou, Hongyi, and Xu, Xinhua
- Subjects
- *
DECHLORINATION (Chemistry) , *ADSORPTION (Chemistry) , *DICHLOROPHENOLS , *IRON oxide nanoparticles , *CARBON nanotubes , *CHLOROPHENOLS , *IN situ remediation , *METALLIC composites - Abstract
Abstract: Nanoscale Pd/Fe particles were combined with multi-walled carbon nanotubes (MWNTs) to prepare supported particles (MWNT-stabilized Pd/Fe), which were used to remove 2,4-dichlorophenol (2,4-DCP). The adsorption capacity of MWNTs was found to be increased with the increasing amount of chlorine atoms, and the removal rates of phenol (P), 2-chlorophenol (2-CP), 4-chlorophenol (4-CP) and 2,4-DCP reached 19.7%, 60.5%, 72.0% and 95.1% respectively, in 1min by MWNTs due to π–π interaction. The adsorption kinetics and adsorption isotherm were also discussed. MWNTs as a supporter, was effective for avoiding the agglomeration of nZVI. Furthermore, the speedy removal efficiency of the initial substances (2,4-DCP) reached about 50% in 1min, and over the time continued to rise to 100%, remaining low concentrations (<1mgL−1) of the intermediate substances (o-CP, p-CP), and gradual release of the final substance (P) from MWNT-stabilized Pd/Fe composites during the whole process, proposed a novel method for in situ remediation technology. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF