PMID- 33445050
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20210601
LR  - 20210601
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 411
DP  - 2021 Jun 5
TI  - Cu(2+)/Cu(+) cycle promoted PMS decomposition with the assistance of Mo for the 
      degradation of organic pollutant.
PG  - 125050
LID - S0304-3894(21)00014-5 [pii]
LID - 10.1016/j.jhazmat.2021.125050 [doi]
AB  - The limited production of Cu(+) in the Cu(2+)/PMS processes constrained its 
      large-scan application for the elimination of organic pollutants. In this study, 
      molybdenum powder (Mo) was applied as the co-catalyst to improve the degradation 
      of 2,4-dichlorophenol (2,4-DCP) in Cu(2+)/PMS system at pH 5.6. By the assistance 
      of Mo, Cu(2+) was rapidly reduced to Cu(+) which exhibited super activity for the 
      peroxymonosulfate (PMS) activation. Compared with Cu(2+)/PMS processes, the PMS 
      decomposition rate and 2,4-DCP degradation efficiency respectively increased by 
      62.1% and 83.6% in the Mo co-catalytic Cu(2+)/PMS system after reaction for 
      20 min. The degradation of 2,4-DCP was completed via both the free radical and 
      non-radical pathways and the free radicals rather than Cu(3+) contributed most to 
      the reaction. In contrast to fresh Mo, the ratio of Mo(4+) increased and Mo(6+) 
      decreased in the used Mo powder, due to the oxidation of Mo(0) by Cu(2+) and/or 
      ∙OH and the reduction of Mo(6+) by O(2)∙(-). Additionally, the coexistence of 
      Cl(-) and humic acid with low concentrations showed little effects on the 
      Mo/Cu(2+)/PMS system while HCO(3)(-) presented an obvious depression for 2,4-DCP 
      degradation. During five cycling runs, all the degradation rates were higher than 
      92.8%, indicating the good stability of Mo/Cu(2+)/PMS system.
CI  - Copyright (c) 2021 Elsevier B.V. All rights reserved.
FAU - Zhou, Xin
AU  - Zhou X
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China.
FAU - Luo, Haopeng
AU  - Luo H
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China.
FAU - Sheng, Bo
AU  - Sheng B
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China.
FAU - Chen, Xingyu
AU  - Chen X
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China.
FAU - Wang, Yihao
AU  - Wang Y
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China.
FAU - Chen, Quanyuan
AU  - Chen Q
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China; Shanghai Institute of Pollution Control and Ecological 
      Security, Shanghai 200092, PR China.
FAU - Zhou, Juan
AU  - Zhou J
AD  - College of Environmental Science and Engineering, Donghua University, Shanghai 
      201620, PR China; Shanghai Institute of Pollution Control and Ecological 
      Security, Shanghai 200092, PR China. Electronic address: jzhou@dhu.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20210106
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
SB  - IM
OTO - NOTNLM
OT  - 2,4-DCP
OT  - Co-catalytic effect
OT  - Cu(2+)/Cu(+) cycle
OT  - Cu(2+)/PMS
OT  - Mo
EDAT- 2021/01/15 06:00
MHDA- 2021/01/15 06:01
CRDT- 2021/01/14 20:18
PHST- 2020/11/03 00:00 [received]
PHST- 2020/12/22 00:00 [revised]
PHST- 2021/01/04 00:00 [accepted]
PHST- 2021/01/15 06:00 [pubmed]
PHST- 2021/01/15 06:01 [medline]
PHST- 2021/01/14 20:18 [entrez]
AID - S0304-3894(21)00014-5 [pii]
AID - 10.1016/j.jhazmat.2021.125050 [doi]
PST - ppublish
SO  - J Hazard Mater. 2021 Jun 5;411:125050. doi: 10.1016/j.jhazmat.2021.125050. Epub 
      2021 Jan 6.