PMID- 30216875
OWN - NLM
STAT- MEDLINE
DCOM- 20181029
LR  - 20181029
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 227
DP  - 2018 Dec 1
TI  - Sulfate radical induced degradation of Methyl Violet azo dye with CuFe layered 
      doubled hydroxide as heterogeneous photoactivator of persulfate.
PG  - 406-414
LID - S0301-4797(18)30901-0 [pii]
LID - 10.1016/j.jenvman.2018.08.030 [doi]
AB  - Persulfate (PS)-based advanced oxidation processes have aroused considerable 
      attentions due to their higher efficiency and wider adaptability to the 
      degradation of bio-recalcitrant organic contaminants. In this study, Cu-Fe 
      layered doubled hydroxide (CuFe-LDH) was employed to degrade Methyl Violet (MV) 
      through heterogeneous photo-activation of PS under visible-light irradiation. The 
      reaction kinetics, degradation mechanism, catalyst stability were investigated in 
      detail. Under the conditions of CuFe-LDH (3:1) dosage 0.2 g/L, PS concentration 
      0.2 g/L and without initial pH adjustment, 20 mg/L MV was almost completely 
      degraded within 18 min. Electron Spin Resonance (ESR) test and radical quenching 
      experiment indicated that sulfate radicals (SO(4)(-)) were the dominant reactive 
      oxidants for the MV decolorization, while hydroxyl radicals (OH) were also 
      involved. The CuFe-LDH/PS/Vis system was applicable at wide range of pH level 
      (3-9). However, extreme pH level would lead to the reduction or transformation of 
      SO(4)(-). The catalyst CuFe-LDH exhibited excellent stability and maintained 
      relatively high catalytic activity to PS even after four recycles. Mechanism 
      study revealed that the redox cycle of Fe(3+)/Fe(2+) and Cu(2+)/Cu(3+) assisted 
      by visible-light irradiation accounted for the enhanced generation of radicals in 
      CuFe-LDH/PS/Vis system, resulting in the improved degradation of organic 
      contaminants. Overall, the CuFe-LDH/PS/Vis process could be a promising approach 
      for the removal of refractory organic pollutants in wastewater.
CI  - Copyright (c) 2018 Elsevier Ltd. All rights reserved.
FAU - Ma, Yinghao
AU  - Ma Y
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic 
      address: mayinghao@hnu.edu.cn.
FAU - Chen, Fei
AU  - Chen F
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
FAU - Yang, Qi
AU  - Yang Q
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic 
      address: yangqi@hnu.edu.cn.
FAU - Zhong, Yu
AU  - Zhong Y
AD  - Key Laboratory of Water Pollution Control Technology, Hunan Research Academy of 
      Environmental Sciences, Changsha 410004, PR China.
FAU - Shu, Xiaoyu
AU  - Shu X
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
FAU - Yao, Fubing
AU  - Yao F
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
FAU - Xie, Ting
AU  - Xie T
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
FAU - Li, Xiaoming
AU  - Li X
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
FAU - Wang, Dongbo
AU  - Wang D
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic 
      address: dongbowang@hnu.edu.cn.
FAU - Zeng, Guangming
AU  - Zeng G
AD  - College of Environmental Science and Engineering, Hunan University, Changsha 
      410082, PR China; Key Laboratory of Environmental Biology and Pollution Control 
      (Hunan University), Ministry of Education, Changsha 410082, PR China.
LA  - eng
PT  - Journal Article
DEP - 20180911
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Azo Compounds)
RN  - 0 (Hydroxides)
RN  - 0 (Sulfates)
RN  - 0 (Water Pollutants, Chemical)
RN  - 0 (sulfate radical)
RN  - J4Z741D6O5 (Gentian Violet)
SB  - IM
MH  - Azo Compounds
MH  - *Gentian Violet
MH  - Hydroxides
MH  - Oxidation-Reduction
MH  - *Sulfates
MH  - *Water Pollutants, Chemical
OTO - NOTNLM
OT  - Cu-Fe layered doubled hydroxide
OT  - Heterogeneous photo-activation
OT  - Methyl Violet
OT  - Persulfate
OT  - Visible-light irradiation
EDAT- 2018/09/15 06:00
MHDA- 2018/10/30 06:00
CRDT- 2018/09/15 06:00
PHST- 2018/02/25 00:00 [received]
PHST- 2018/06/14 00:00 [revised]
PHST- 2018/08/06 00:00 [accepted]
PHST- 2018/09/15 06:00 [pubmed]
PHST- 2018/10/30 06:00 [medline]
PHST- 2018/09/15 06:00 [entrez]
AID - S0301-4797(18)30901-0 [pii]
AID - 10.1016/j.jenvman.2018.08.030 [doi]
PST - ppublish
SO  - J Environ Manage. 2018 Dec 1;227:406-414. doi: 10.1016/j.jenvman.2018.08.030. 
      Epub 2018 Sep 11.