PMID- 23266438
OWN - NLM
STAT- MEDLINE
DCOM- 20130705
LR  - 20131121
IS  - 1873-2828 (Electronic)
IS  - 1350-4177 (Linking)
VI  - 20
IP  - 3
DP  - 2013 May
TI  - Reductive dechlorination of 2,4-dichlorophenol by Pd/Fe nanoparticles prepared in 
      the presence of ultrasonic irradiation.
PG  - 864-71
LID - S1350-4177(12)00271-4 [pii]
LID - 10.1016/j.ultsonch.2012.11.015 [doi]
AB  - Palladium/Iron (Pd/Fe) nanoparticles were prepared by using ultrasound 
      strengthened liquid phase reductive method to enhance dispersion and avoid 
      agglomeration. The dechlorination of 2,4-dichlorophenol (2,4-DCP) by Pd/Fe 
      nanoparticles was investigated to understand its feasibility for an in situ 
      remediation of contaminated groundwater. Results showed that 2,4-DCP was first 
      adsorbed by Pd/Fe nanoparticles, then quickly reduced to o-chlorophenol (o-CP), 
      p-chlorophenol (p-CP), and finally to phenol (P). The induction of ultrasound 
      during the preparation of Pd/Fe nanoparticles further enhanced the removal 
      efficiency of 2,4-DCP, as a result, the phenol production rates increased from 
      65% (in the absence of ultrasonic irradiation) to 91% (in the presence of 
      ultrasonic irradiation) within 2h. Our data suggested that the dechlorination 
      rate was dependent on various factors including Pd loading percentage over Fe(0), 
      Pd/Fe nanoparticles availability, temperature, mechanical stirring speed, and 
      initial pH values. Up to 99.2% of 2,4-DCP was removed after 300min reaction with 
      these conditions: Pd loading percentage over Fe(0) 0.3wt.%, initial 2,4-DCP 
      concentration 20mgL(-1), Pd/Fe dosage 3gL(-1), initial pH value 3.0, and reaction 
      temperature 25 degrees C. The degradation of 2,4-DCP followed pseudo-first-order kinetics 
      reaction and the apparent pseudo-first-order kinetics constant was 0.0468min(-1).
CI  - Copyright (c) 2012 Elsevier B.V. All rights reserved.
FAU - Zhao, Deming
AU  - Zhao D
AD  - College of Chemical Engineering and Materials Science, Zhejiang University of 
      Technology, Hangzhou 310032, PR China.
FAU - Li, Min
AU  - Li M
FAU - Zhang, Dexing
AU  - Zhang D
FAU - Baig, Shams Ali
AU  - Baig SA
FAU - Xu, Xinhua
AU  - Xu X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121203
PL  - Netherlands
TA  - Ultrason Sonochem
JT  - Ultrasonics sonochemistry
JID - 9433356
RN  - 0 (Chlorophenols)
RN  - 0 (Water Pollutants, Chemical)
RN  - 5TWQ1V240M (Palladium)
RN  - E1UOL152H7 (Iron)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Chlorophenols/*isolation & purification
MH  - Groundwater/chemistry
MH  - Iron/*chemistry
MH  - Kinetics
MH  - Metal Nanoparticles/*chemistry/radiation effects
MH  - Microscopy, Electron, Transmission
MH  - Oxidation-Reduction
MH  - Palladium/*chemistry
MH  - Sonication/*methods
MH  - Sound
MH  - Surface Properties
MH  - Water Pollutants, Chemical/*isolation & purification
MH  - Water Purification/*methods
EDAT- 2012/12/26 06:00
MHDA- 2013/07/06 06:00
CRDT- 2012/12/26 06:00
PHST- 2012/08/15 00:00 [received]
PHST- 2012/10/29 00:00 [revised]
PHST- 2012/11/25 00:00 [accepted]
PHST- 2012/12/26 06:00 [entrez]
PHST- 2012/12/26 06:00 [pubmed]
PHST- 2013/07/06 06:00 [medline]
AID - S1350-4177(12)00271-4 [pii]
AID - 10.1016/j.ultsonch.2012.11.015 [doi]
PST - ppublish
SO  - Ultrason Sonochem. 2013 May;20(3):864-71. doi: 10.1016/j.ultsonch.2012.11.015. 
      Epub 2012 Dec 3.