PMID- 27558831
OWN - NLM
STAT- MEDLINE
DCOM- 20170504
LR  - 20170504
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 195
IP  - Pt 2
DP  - 2017 Jun 15
TI  - Influence of pH and ozone dose on sulfaquinoxaline ozonation.
PG  - 224-231
LID - S0301-4797(16)30557-6 [pii]
LID - 10.1016/j.jenvman.2016.08.019 [doi]
AB  - Sulfaquinoxaline (SQX) is an antimicrobial of the sulfonamides class. Usually 
      employed in veterinary medicine, this contaminant of emerging concern has been 
      found in superficial and groundwater and its consequences for the environment and 
      human health are not completely known. In this study, SQX (C(0) = 500 mug L(-1), 
      1 L) degradation by an ozonation process at pH 3, 7, and 11 was evaluated. 
      Ozonation was effective in degrading SQX: efficiency exceeding 99% was obtained 
      applying an ozone dose of 2.8 mg L(-1) at pH 3. Assays were performed according 
      to a 2(2) design of experiments (DOE) with star points and three central points 
      for statistical validity. Minimum and maximum levels were set at 3 and 11 for pH, 
      and 0 and 11.5 mg L(-1) for applied ozone dose. There was no significant 
      interaction between these variables, and the pH value played the most important 
      role in terms of contaminant degradation. In relation to toxicity, samples 
      ozonated at pH 3 did not inhibit the luminescence of the bacteria, even though 
      different intermediates were formed and identified by mass spectra. At pH 7, 
      inhibition of luminescence remained almost constant (at around 30%) according to 
      ozonation time or ozone dose. However, the hydroxyl radical, the major oxidant at 
      pH 11, was responsible for the formation of toxic intermediates.
CI  - Copyright (c) 2016 Elsevier Ltd. All rights reserved.
FAU - Urbano, Vanessa Ribeiro
AU  - Urbano VR
AD  - School of Civil Engineering, Architecture and Urban Design, University of 
      Campinas, P.O. Box 6143, 13083-889, Campinas, Brazil.
FAU - Maniero, Milena Guedes
AU  - Maniero MG
AD  - School of Civil Engineering, Architecture and Urban Design, University of 
      Campinas, P.O. Box 6143, 13083-889, Campinas, Brazil.
FAU - Perez-Moya, Montserrat
AU  - Perez-Moya M
AD  - Escola d'Enginyeria de Barcelona Est, EEBE, Chemical Engineering Department, UPC, 
      BARCELONATECH, Comte d'Urgell 187, 08036, Barcelona, Spain.
FAU - Guimaraes, Jose Roberto
AU  - Guimaraes JR
AD  - School of Civil Engineering, Architecture and Urban Design, University of 
      Campinas, P.O. Box 6143, 13083-889, Campinas, Brazil. Electronic address: 
      jorober@fec.unicamp.br.
LA  - eng
PT  - Journal Article
DEP - 20160821
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Water Pollutants, Chemical)
RN  - 3352-57-6 (Hydroxyl Radical)
RN  - 66H7ZZK23N (Ozone)
RN  - WNW8115TM9 (Sulfaquinoxaline)
SB  - IM
MH  - Hydrogen-Ion Concentration
MH  - Hydroxyl Radical
MH  - Oxidation-Reduction
MH  - *Ozone
MH  - *Sulfaquinoxaline
MH  - Water Pollutants, Chemical
OTO - NOTNLM
OT  - Advanced oxidation processes
OT  - Microtox
OT  - Molecular ozone
OT  - Sulfonamides
OT  - Toxicity assays
EDAT- 2016/08/26 06:00
MHDA- 2017/05/05 06:00
CRDT- 2016/08/26 06:00
PHST- 2016/02/15 00:00 [received]
PHST- 2016/08/04 00:00 [revised]
PHST- 2016/08/08 00:00 [accepted]
PHST- 2016/08/26 06:00 [pubmed]
PHST- 2017/05/05 06:00 [medline]
PHST- 2016/08/26 06:00 [entrez]
AID - S0301-4797(16)30557-6 [pii]
AID - 10.1016/j.jenvman.2016.08.019 [doi]
PST - ppublish
SO  - J Environ Manage. 2017 Jun 15;195(Pt 2):224-231. doi: 
      10.1016/j.jenvman.2016.08.019. Epub 2016 Aug 21.