PMID- 31476504
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20191206
LR  - 20191217
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 697
DP  - 2019 Dec 20
TI  - A new insight into the main mechanism of 2,4-dichlorophenol dechlorination by 
      Fe/Ni nanoparticles.
PG  - 133996
LID - S0048-9697(19)33973-7 [pii]
LID - 10.1016/j.scitotenv.2019.133996 [doi]
AB  - Three possible dechlorination mechanisms of chloroorganics by nanoscale 
      zero-valent iron (n-ZVI) have been proposed and widely accepted, however, the 
      main mechanism is still controversial and not verified by experimental results. 
      In this study, 2,4-dichlorophenol (2,4-DCP) was selected as the target pollutant 
      and the experiments were carried out for the screening of the main mechanism of 
      2,4-DCP dechlorination by n-ZVI and Fe/Ni nanoparticles (n-Fe/Ni). The results 
      indicated that >95% of 2,4-DCP could be dechlorinated to phenol by n-Fe/Ni within 
      120 min, while 2,4-DCP could hardly be dechlorinated by n-ZVI particles. The 
      active hydrogen atom (H*) that transformed from H(2) under the catalysis of Ni 
      was responsible for >90% of 2,4-DCP dechlorination by n-Fe/Ni and <10% of the 
      dechlorination was attributed to the direct electron transfer from ZVI. Fe(2+) 
      was not able to dechlorinate 2,4-DCP. Correspondently, Ni in n-Fe/Ni mainly acted 
      as a catalyst, while the acceleration of electron transfer from ZVI by Ni had a 
      positive effect on 2,4-DCP dechlorination. The investigations on the relative 
      importance of these three mechanisms are essential to iron-based remediation 
      technology.
CI  - Copyright (c) 2019 Elsevier B.V. All rights reserved.
FAU - Ruan, Xia
AU  - Ruan X
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient 
      Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University 
      of Science and Technology, Wuhan 430081, China.
FAU - Liu, Hong
AU  - Liu H
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient 
      Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University 
      of Science and Technology, Wuhan 430081, China. Electronic address: 
      liuhong64@126.com.
FAU - Wang, Junwen
AU  - Wang J
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient 
      Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University 
      of Science and Technology, Wuhan 430081, China.
FAU - Zhao, Dongye
AU  - Zhao D
AD  - Environmental Engineering Program, Department of Civil Engineering, Auburn 
      University, Auburn, AL 36849, USA.
FAU - Fan, Xianyuan
AU  - Fan X
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China; Hubei Key Laboratory for Efficient 
      Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University 
      of Science and Technology, Wuhan 430081, China.
LA  - eng
PT  - Journal Article
DEP - 20190819
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - 2,4-dichlorophenol
OT  - Dechlorination
OT  - Ni
OT  - ZVI
OT  - n-Fe/Ni
EDAT- 2019/09/03 06:00
MHDA- 2019/09/03 06:01
CRDT- 2019/09/03 06:00
PHST- 2019/04/08 00:00 [received]
PHST- 2019/08/07 00:00 [revised]
PHST- 2019/08/18 00:00 [accepted]
PHST- 2019/09/03 06:00 [pubmed]
PHST- 2019/09/03 06:01 [medline]
PHST- 2019/09/03 06:00 [entrez]
AID - S0048-9697(19)33973-7 [pii]
AID - 10.1016/j.scitotenv.2019.133996 [doi]
PST - ppublish
SO  - Sci Total Environ. 2019 Dec 20;697:133996. doi: 10.1016/j.scitotenv.2019.133996. 
      Epub 2019 Aug 19.