title: Simultaneous adsorption and dechlorination of 2,4-dichlorophenol by Pd/Fe nanoparticles with multi-walled carbon nanotube support.
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 (<1mg L(-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.
authors.affiliation: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Xu
authors.forename: Xiaoshu
authors.initials: X
authors.lastname: Lv
authors.forename: Jiadan
authors.initials: J
authors.lastname: Li
authors.forename: Yingying
authors.initials: Y
authors.lastname: Li
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.forename: Hongyi
authors.initials: H
authors.lastname: Zhou
authors.forename: Xinhua
authors.initials: X
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D002713:Chlorine / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D002733:Chlorophenols; D037742:Nanotubes, Carbon; D002713:Chlorine; D010165:Palladium; D007501:Iron; C004762:2,4-dichlorophenol