PMID- 35683256
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 15
IP  - 11
DP  - 2022 Jun 2
TI  - Performance, Reaction Pathway and Kinetics of the Enhanced Dechlorination 
      Degradation of 2,4-Dichlorophenol by Fe/Ni Nanoparticles Supported on Attapulgite 
      Disaggregated by a Ball Milling-Freezing Process.
LID - 10.3390/ma15113957 [doi]
LID - 3957
AB  - Attapulgite (ATP) disaggregated by a ball milling-freezing process was used to 
      support Fe/Ni bimetallic nanoparticles (nFe/Ni) to obtain a composite material of 
      D-ATP-nFe/Ni for the dechlorination degradation of 2,4-dichlorophenol (2,4-DCP), 
      thus improving the problem of agglomeration and oxidation passivation of 
      nanoscale zero-valent iron (nFe) in the dechlorination degradation of chlorinated 
      organic compounds. The results show that Fe/Ni nanoparticle clusters were 
      dispersed into single spherical particles by the ball 
      milling-freezing-disaggregated attapulgite, in which the average particle size 
      decreased from 423.94 nm to 54.51 nm, and the specific surface area of D-ATP-nFe 
      /Ni (97.10 m(2)/g) was 6.9 times greater than that of nFe/Ni (14.15 m(2)/g). 
      Therefore, the degradation rate of 2,4-DCP increased from 81.9% during ATP-nFe/Ni 
      application to 96.8% during D-ATP-nFe/Ni application within 120 min, and the 
      yield of phenol increased from 57.2% to 86.1%. Meanwhile, the reaction rate 
      K(obs) of the degradation of 2,4-DCP by D-ATP-nFe/Ni was 0.0277 min(-1), which 
      was higher than that of ATP-nFe/Ni (0.0135 min(-1)). In the dechlorination 
      process of 2,4-DCP by D-ATP-nFe/Ni, the reaction rate for the direct 
      dechlorination of 2,4-DCP of phenol (k(5) = 0.0156 min(-1)) was much higher than 
      that of 4-chlorophenol (4-CP, k(2) = 0.0052 min(-1)) and 2-chlorophenol (2-CP, 
      k(1) = 0.0070 min(-1)), which suggests that the main dechlorination degradation 
      pathway for the removal of 2,4-DCP by D-ATP-nFe/Ni was directly reduced to phenol 
      by the removal of two chlorine atoms. In the secondary pathway, the removal of 
      one chlorine atom from 2,4-DCP to generate 2-CP or 4-CP as intermediate was the 
      rate controlling step. The final dechlorination product (phenol) was obtained 
      when the dechlorination rate accelerated with the progress of the reaction. This 
      study contributes to the broad topic of organic pollutant treatment by the 
      application of clay minerals.
FAU - Wu, Hongdan
AU  - Wu H
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China.
AD  - Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic 
      Mineral Resources, Wuhan University of Science and Technology, Wuhan 430081, 
      China.
FAU - Wang, Junwen
AU  - Wang J
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China.
AD  - 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.
AD  - Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic 
      Mineral Resources, Wuhan University of Science and Technology, Wuhan 430081, 
      China.
FAU - Fan, Xianyuan
AU  - Fan X
AD  - College of Resource and Environmental Engineering, Wuhan University of Science 
      and Technology, Wuhan 430081, China.
AD  - Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic 
      Mineral Resources, Wuhan University of Science and Technology, Wuhan 430081, 
      China.
LA  - eng
GR  - 41230638/Key Project of Natural Science Foundation of China/
GR  - B2020019/Guiding Project of Science and Technology Research of Education 
      Department of Hubei Province/
PT  - Journal Article
DEP - 20220602
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC9181927
OTO - NOTNLM
OT  - 2,4-dichlorophenol
OT  - Fe/Ni bimetallic nanoparticles
OT  - dechlorination degradation
OT  - disaggregated attapulgite
OT  - kinetics
OT  - reaction pathway
COIS- The authors declare no conflict of interest.
EDAT- 2022/06/11 06:00
MHDA- 2022/06/11 06:01
PMCR- 2022/06/02
CRDT- 2022/06/10 01:17
PHST- 2022/04/26 00:00 [received]
PHST- 2022/05/23 00:00 [revised]
PHST- 2022/05/30 00:00 [accepted]
PHST- 2022/06/10 01:17 [entrez]
PHST- 2022/06/11 06:00 [pubmed]
PHST- 2022/06/11 06:01 [medline]
PHST- 2022/06/02 00:00 [pmc-release]
AID - ma15113957 [pii]
AID - materials-15-03957 [pii]
AID - 10.3390/ma15113957 [doi]
PST - epublish
SO  - Materials (Basel). 2022 Jun 2;15(11):3957. doi: 10.3390/ma15113957.