PMID- 25559487
OWN - NLM
STAT- MEDLINE
DCOM- 20151229
LR  - 20150220
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 70
DP  - 2015 Mar 1
TI  - Heterogeneous electro-Fenton using modified iron-carbon as catalyst for 
      2,4-dichlorophenol degradation: influence factors, mechanism and degradation 
      pathway.
PG  - 414-24
LID - S0043-1354(14)00854-9 [pii]
LID - 10.1016/j.watres.2014.12.022 [doi]
AB  - Modified iron-carbon with polytetra fl uoroethylene (PTFE) was firstly investigated 
      as heterogeneous electro-Fenton (EF) catalyst for 2,4-dichlorophenol (2,4-DCP) 
      degradation in near neutral pH condition. The catalyst was characterized by 
      scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and 
      X-ray diffraction (XRD), and the effects of some important operating parameters 
      such as current intensity and pH on the 2,4-DCP degradation were investigated. 
      After the catalyst modification with 20% PTFE, the degradation performance 
      maintained well with much lower iron leaching, and at current intensity 100 mA, 
      initial pH 6.7, catalyst loading 6 g/L, the degradation efficiency of 2,4-DCP 
      could exceed 95% within 120 min treatment. Two-stage pseudo first-order kinetics 
      of 2,4-DCP degradation was observed, including a slow anodic oxidation stage 
      (first-stage) and much faster heterogeneous EF oxidation (second-stage), in which 
      the automatic drop of pH in the first-stage initiated the Fe(2+) release from 
      micro-electrolysis and thus benefited to the subsequent EF reaction. Aromatic 
      intermediates such as 3,5-dichlorocatechol, 4,6-dichlororesorcinol and 
      2-chlorohydroquinone were detected by GC-MS. Oxalic acid, acetic acid, formic 
      acid and Cl(-) were quanti fi ed by ion chromatograph. Based on these analysis as 
      well as the detection of H(2)O(2) and OH, a possible mechanism and degradation 
      pathway for 2,4-DCP were proposed. This work demonstrated that such a 
      heterogeneous EF using cheap modified Fe-C catalyst was promising for organic 
      wastewater treatment in initial neutral pH condition.
CI  - Copyright (c) 2014 Elsevier Ltd. All rights reserved.
FAU - Zhang, Chao
AU  - Zhang C
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
FAU - Zhou, Minghua
AU  - Zhou M
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China. Electronic address: 
      zhoumh@nankai.edu.cn.
FAU - Ren, Gengbo
AU  - Ren G
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
FAU - Yu, Xinmin
AU  - Yu X
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
FAU - Ma, Liang
AU  - Ma L
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
FAU - Yang, Jie
AU  - Yang J
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
FAU - Yu, Fangke
AU  - Yu F
AD  - Key Laboratory of Pollution Process and Environmental Criteria, Ministry of 
      Education, College of Environmental Science and Engineering, Nankai University, 
      Tianjin 300071, China; Tianjin Key Laboratory of Urban Ecology Environmental 
      Remediation and Pollution Control, College of Environmental Science and 
      Engineering, Nankai University, Tianjin 300071, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20141220
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Chlorophenols)
RN  - 0 (Water Pollutants, Chemical)
RN  - 7440-44-0 (Carbon)
RN  - 9002-84-0 (Polytetrafluoroethylene)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - E1UOL152H7 (Iron)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Carbon/*chemistry
MH  - Chlorophenols/*chemistry
MH  - Electric Conductivity
MH  - Electrolysis
MH  - Hydrogen Peroxide/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Iron/*chemistry
MH  - Microscopy, Electron, Scanning
MH  - Photoelectron Spectroscopy
MH  - Polytetrafluoroethylene/*chemistry
MH  - Waste Disposal, Fluid
MH  - Water Pollutants, Chemical/*chemistry
MH  - X-Ray Diffraction
OTO - NOTNLM
OT  - 2,4-Dichlorophenol
OT  - Air diffusion electrode
OT  - Degradation mechanism
OT  - Heterogeneous electro-Fenton
OT  - Modified iron-carbon
EDAT- 2015/01/07 06:00
MHDA- 2015/12/30 06:00
CRDT- 2015/01/07 06:00
PHST- 2014/06/10 00:00 [received]
PHST- 2014/09/18 00:00 [revised]
PHST- 2014/12/14 00:00 [accepted]
PHST- 2015/01/07 06:00 [entrez]
PHST- 2015/01/07 06:00 [pubmed]
PHST- 2015/12/30 06:00 [medline]
AID - S0043-1354(14)00854-9 [pii]
AID - 10.1016/j.watres.2014.12.022 [doi]
PST - ppublish
SO  - Water Res. 2015 Mar 1;70:414-24. doi: 10.1016/j.watres.2014.12.022. Epub 2014 Dec 
      20.