PMID- 20394962
OWN - NLM
STAT- MEDLINE
DCOM- 20100719
LR  - 20141120
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 79
IP  - 10
DP  - 2010 May
TI  - Electrochemical properties of the erbium-chitosan-fluorine-modified PbO2 
      electrode for the degradation of 2,4-dichlorophenol in aqueous solution.
PG  - 987-96
LID - 10.1016/j.chemosphere.2010.03.029 [doi]
AB  - The erbium (Er)-chitosan-fluorine (F) modified PbO(2) electrode was prepared by 
      electrodeposition method, and its use for adsorption and electrochemical 
      degradation of 2,4-dichlorophenol (2,4-DCP) in aqueous solution was compared with 
      F-PbO(2) and Er-F-PbO(2) electrodes in a batch experiment. The electrodes were 
      characterized by scanning electron microscopy, X-ray diffraction and cyclic 
      voltammetry. Degradation of 2,4-DCP depending on Er and chitosan contents was 
      discussed. The results showed that Er(2)O(3) and chitosan were scattered between 
      the prevailing crystal structure of beta-PbO(2) and thus decreased the internal 
      stress of PbO(2) film. Prior to each electrolysis, the modified PbO(2) anode was 
      first pre-saturated with 2,4-DCP solution for 360 min to preclude the 2,4-DCP 
      decrease due to adsorption. Among the electrodes examined in our study, the 
      highest adsorption and electrochemical degradation for 2,4-DCP and TOC removals 
      that are due to oxidation and adsorption of the organic products onto the 
      chitosan was observed on Er-chitosan-F-PbO(2) electrode. At an applied current 
      density of 5 mAcm(-2), the removal percentages of 2,4-DCP and TOC (solution 
      volume: 180 mL, initial 2,4-DCP concentration: 90 mgL(-1)) were 95% after 120 min 
      and 53% after 360 min, respectively. At Er amount of 10mM in the precursor 
      coating solution, the degradation and mineralization removal for 2,4-DCP on the 
      Er-F-PbO(2) electrode reached a maximum. At chitosan amount of 5 gL(-1), the 
      highest TOC removal on the Er-chitosan-F-PbO(2) electrode was observed. 
      Intermediates mainly including aliphatic carboxylic acids were examined and a 
      possible degradation pathway for 2,4-DCP in aqueous solution involving 
      dechlorination and hydroxylation reactions was proposed.
CI  - Copyright 2010 Elsevier Ltd. All rights reserved.
FAU - Wang, Ying
AU  - Wang Y
AD  - State Key Laboratory of Water Environment Simulation, School of Environment, 
      Beijing Normal University, Beijing 100875, PR China. wangying_21cn@yahoo.com.cn
FAU - Shen, Zhenyao
AU  - Shen Z
FAU - Li, Yang
AU  - Li Y
FAU - Niu, Junfeng
AU  - Niu J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20100414
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Chlorophenols)
RN  - 0 (Oxides)
RN  - 0 (Water Pollutants, Chemical)
RN  - 284SYP0193 (Fluorine)
RN  - 2P299V784P (Lead)
RN  - 4IN6FN8492 (lead oxide)
RN  - 77B218D3YE (Erbium)
RN  - 9012-76-4 (Chitosan)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Adsorption
MH  - Chitosan/*chemistry
MH  - Chlorophenols/*chemistry
MH  - Electrochemical Techniques
MH  - Electrodes
MH  - Environmental Restoration and Remediation
MH  - Erbium/*chemistry
MH  - Fluorine/*chemistry
MH  - Lead/*chemistry
MH  - Oxidation-Reduction
MH  - Oxides/*chemistry
MH  - Water Pollutants, Chemical/chemistry
EDAT- 2010/04/17 06:00
MHDA- 2010/07/20 06:00
CRDT- 2010/04/17 06:00
PHST- 2009/09/25 00:00 [received]
PHST- 2010/03/18 00:00 [revised]
PHST- 2010/03/19 00:00 [accepted]
PHST- 2010/04/17 06:00 [entrez]
PHST- 2010/04/17 06:00 [pubmed]
PHST- 2010/07/20 06:00 [medline]
AID - S0045-6535(10)00328-0 [pii]
AID - 10.1016/j.chemosphere.2010.03.029 [doi]
PST - ppublish
SO  - Chemosphere. 2010 May;79(10):987-96. doi: 10.1016/j.chemosphere.2010.03.029. Epub 
      2010 Apr 14.