PMID- 33420930
OWN - NLM
STAT- MEDLINE
DCOM- 20210527
LR  - 20210527
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 28
IP  - 19
DP  - 2021 May
TI  - Degradation of 2,4,6-trichlorophenol in aqueous systems through the association 
      of zero-valent-copper-mediated reduction and UVC/H(2)O(2): effect of water matrix 
      and toxicity assessment.
PG  - 24057-24066
LID - 10.1007/s11356-020-11885-8 [doi]
AB  - The presence of toxic chlorinated compounds in drinking water, generated during 
      the disinfection step in water treatment plants, is of great concern for public 
      health. In the present study, the performance of the UVC/H(2)O(2) process, 
      preceded by zero-valent-copper reduction, was evaluated for degrading 
      2,4,6-trichlorophenol (TCP). With this aim, the oxidation performed alone or in 
      combination with the pre-reductive step was evaluated regarding TCP concentration 
      over time, removal rate, mineralization, and toxicity to Vibrio fischeri, as well 
      as oxidant dosage and the effect of water matrix. The UV/H(2)O(2) process 
      achieved fast (k(obs) = 1.4 min(-1)) and complete TCP degradation, as well as 
      important mineralization (40.4%), with best results obtained for initial H(2)O(2) 
      concentration of 0.056 mmol L(-1). Coupling of reductive and oxidative processes 
      intensified contaminant mineralization, due to the synergistic effect of copper 
      ions leached in the reductive process, particularly Cu(I), providing an 
      additional route of H(2)O(2) activation for generating HO(*) radicals 
      (photo-Fenton-like process). High toxicity removals and increased mineralization 
      could be successfully accomplished by the combined processes even in tap water, 
      which is a clear advantage for practical application.
FAU - de Souza, Larissa Pinheiro
AU  - de Souza LP
AUID- ORCID: 0000-0001-7680-103X
AD  - Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical 
      Engineering, University of Sao Paulo, Sao Paulo, Brazil. larissapdesouza@usp.br.
FAU - Graca, Catia Alexandra Leca
AU  - Graca CAL
AD  - Laboratory of Separation and Reaction Engineering and Laboratory of Catalysis and 
      Materials (LSRE-LCM), Department of Chemical Engineering, University of Porto, 
      Porto, Portugal.
FAU - Teixeira, Antonio Carlos S C
AU  - Teixeira ACSC
AD  - Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical 
      Engineering, University of Sao Paulo, Sao Paulo, Brazil.
FAU - Chiavone-Filho, Osvaldo
AU  - Chiavone-Filho O
AD  - Federal University of Rio Grande do Norte, Natal, Brazil.
LA  - eng
GR  - 88881.068433/2014-01/Coordination for the Improvement of Higher Education 
      Personnel/
GR  - 2013/50218-2/Fundacao de Amparo a Pesquisa do Estado de Sao Paulo/
GR  - 3300201/Coordination for the Improvement of Higher Education Personnel/
PT  - Journal Article
DEP - 20210109
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Chlorophenols)
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
RN  - 789U1901C5 (Copper)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - MHS8C5BAUZ (2,4,6-trichlorophenol)
SB  - IM
MH  - Chlorophenols
MH  - Copper
MH  - Hydrogen Peroxide
MH  - Oxidation-Reduction
MH  - Ultraviolet Rays
MH  - Water
MH  - *Water Pollutants, Chemical
MH  - *Water Purification
OTO - NOTNLM
OT  - 2,4,6-Trichlorophenol
OT  - Combined reduction-oxidation process
OT  - Photo-Fenton-like
OT  - UV/H2O2
OT  - Waste copper wire
OT  - Water treatment
OT  - Zero-valent-copper
EDAT- 2021/01/10 06:00
MHDA- 2021/05/28 06:00
CRDT- 2021/01/09 12:06
PHST- 2020/07/14 00:00 [received]
PHST- 2020/11/30 00:00 [accepted]
PHST- 2021/01/10 06:00 [pubmed]
PHST- 2021/05/28 06:00 [medline]
PHST- 2021/01/09 12:06 [entrez]
AID - 10.1007/s11356-020-11885-8 [pii]
AID - 10.1007/s11356-020-11885-8 [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2021 May;28(19):24057-24066. doi: 
      10.1007/s11356-020-11885-8. Epub 2021 Jan 9.