PMID- 20619538
OWN - NLM
STAT- MEDLINE
DCOM- 20101206
LR  - 20131121
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 182
IP  - 1-3
DP  - 2010 Oct 15
TI  - Catalytic dechlorination of 2,4-dichlorophenol by Pd/Fe bimetallic nanoparticles 
      in the presence of humic acid.
PG  - 252-8
LID - 10.1016/j.jhazmat.2010.06.022 [doi]
AB  - Pd/Fe bimetallic nanoparticles were synthesized for treatment of 
      2,4-dichlorophenol (2,4-DCP) in the presence of humic acid (HA), in order to 
      understand their applicability for in situ remediation of groundwater. In this 
      case, 2,4-DCP was catalytically dechlorinated to form the final products--phenol 
      (P) via two intermediates, namely o-chlorophenol (o-CP) and p-chlorophenol 
      (p-CP). We demonstrated that the carbon mass balances during the dechlorination 
      were in the range of 82-91%, and other carbons were absorbed on the surface of 
      Pd/Fe bimetallic nanoparticles. Our results suggest the dechlorination reaction 
      of 2,4-DCP by Pd/Fe bimetallic nanoparticles in the presence of HA followed 
      pseudo-first-order kinetics. HA competed for reaction sites on the Pd/Fe 
      bimetallic nanoparticles with 2,4-DCP, and thus reduced the efficiency and rate 
      of the dechlorination of 2,4-DCP. Efficiencies of dechlorination and phenol 
      formations increased significantly as the Pd content increased from 0.10 wt.%, 
      0.15 wt.% to 0.20 wt.%, the removal percentage of 2,4-DCP increased from 70.4%, 
      98.4% to 99.4% within 300 min, respectively, the nitrate (NO(3)(-)) content in 
      water also has a significant impact on 2,4-DCP dechlorination efficiency. Our 
      results show that no other intermediates were generated besides Cl(-), o-CP, p-CP 
      and phenol during the catalytic dechlorination of 2,4-DCP.
CI  - 2010 Elsevier B.V. All rights reserved.
FAU - Zhang, Zhen
AU  - Zhang Z
AD  - Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, 
      People's Republic of China.
FAU - Shen, Qiaohui
AU  - Shen Q
FAU - Cissoko, Naman
AU  - Cissoko N
FAU - Wo, Jingjing
AU  - Wo J
FAU - Xu, Xinhua
AU  - Xu X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20100611
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Chlorophenols)
RN  - 0 (Humic Substances)
RN  - 4R7X1O2820 (Chlorine)
RN  - 5TWQ1V240M (Palladium)
RN  - E1UOL152H7 (Iron)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Catalysis
MH  - Chlorine/*chemistry
MH  - Chlorophenols/*chemistry
MH  - *Humic Substances
MH  - Iron/*chemistry
MH  - *Metal Nanoparticles
MH  - Microscopy, Electron, Transmission
MH  - Palladium/*chemistry
EDAT- 2010/07/14 06:00
MHDA- 2010/12/14 06:00
CRDT- 2010/07/13 06:00
PHST- 2010/01/27 00:00 [received]
PHST- 2010/06/04 00:00 [revised]
PHST- 2010/06/06 00:00 [accepted]
PHST- 2010/07/13 06:00 [entrez]
PHST- 2010/07/14 06:00 [pubmed]
PHST- 2010/12/14 06:00 [medline]
AID - S0304-3894(10)00762-4 [pii]
AID - 10.1016/j.jhazmat.2010.06.022 [doi]
PST - ppublish
SO  - J Hazard Mater. 2010 Oct 15;182(1-3):252-8. doi: 10.1016/j.jhazmat.2010.06.022. 
      Epub 2010 Jun 11.