PMID- 29554524
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20190923
LR  - 20190923
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 351
DP  - 2018 Jun 5
TI  - A mechanistic study on the potential of quinolinium salts as photocatalysts for 
      the abatement of chlorinated pollutants.
PG  - 277-284
LID - S0304-3894(18)30154-7 [pii]
LID - 10.1016/j.jhazmat.2018.03.010 [doi]
AB  - Photocatalytic degradation of three highly chlorinated contaminants, namely 
      2,4,6-trichlorophenol (TCP), 2,4,6-trichloroanisole (TCA) and 
      5-chloro-2-(2,4-dichlorophenoxy)phenol (triclosan, TCS) has been investigated in 
      the presence of N-methylquinolinium tetrafluoroborate (NMQ(+)), a photocatalyst 
      able to act via Type I or Type II mechanism. Photodegradation of contaminants 
      under aerobic conditions was achieved within hours; and it was accompanied by 
      mineralization, as demonstrated by trapping of the evolved carbon dioxide as 
      barium carbonate. Moreover, a high degree of detoxification, based on % 
      inmobilization of daphnids (Daphnia magna bioassay), was reached after 70 h of 
      irradiation. Quenching of the NMQ(+) fluorescence by the pollutants was evidenced 
      by a decrease in the emission intensity and lifetime. Detection of the reduced 
      NMQ. by laser flash photolysis in the presence of the pollutants provided an 
      unambigous evidence of the electron transfer process. Quenching of singlet oxygen 
      by the contaminants showed the typical singlet oxygen quenching constants 
      (10(5)-10(6) M(-1) s(-1)). Evaluation of the relative contribution of both 
      pathways (Type I vs Type II) point to the photodegradation occurring via a Type I 
      mechanism, being the contribution of Type II mechanism negligible at any 
      concentration range.
CI  - Copyright (c) 2018 Elsevier B.V. All rights reserved.
FAU - Martinez-Haya, Rebeca
AU  - Martinez-Haya R
AD  - Instituto de Tecnologia Quimica, Universitat Politecnica de Valencia-Consejo 
      Superior de Investigaciones Cientificas, Avda. de los Naranjos s/n, E-46022, 
      Valencia, Spain.
FAU - Sabater, Consuelo
AU  - Sabater C
AD  - Departamento de Biotecnologia, Universitat Politecnica de Valencia, Camino de 
      Vera s/n, E-46022 Valencia, Spain.
FAU - Castillo, Maria-Angeles
AU  - Castillo MA
AD  - Departamento de Biotecnologia, Universitat Politecnica de Valencia, Camino de 
      Vera s/n, E-46022 Valencia, Spain.
FAU - Miranda, Miguel A
AU  - Miranda MA
AD  - Instituto de Tecnologia Quimica, Universitat Politecnica de Valencia-Consejo 
      Superior de Investigaciones Cientificas, Avda. de los Naranjos s/n, E-46022, 
      Valencia, Spain. Electronic address: mmiranda@qim.upv.es.
FAU - Marin, M Luisa
AU  - Marin ML
AD  - Instituto de Tecnologia Quimica, Universitat Politecnica de Valencia-Consejo 
      Superior de Investigaciones Cientificas, Avda. de los Naranjos s/n, E-46022, 
      Valencia, Spain. Electronic address: marmarin@qim.upv.es.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20180308
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
SB  - IM
OTO - NOTNLM
OT  - Electron transfer
OT  - Laser flash photolysis
OT  - Singlet excited state
OT  - Singlet oxygen
OT  - Time-resolved fluorescence
EDAT- 2018/03/20 06:00
MHDA- 2018/03/20 06:01
CRDT- 2018/03/20 06:00
PHST- 2017/10/22 00:00 [received]
PHST- 2018/02/28 00:00 [revised]
PHST- 2018/03/06 00:00 [accepted]
PHST- 2018/03/20 06:00 [pubmed]
PHST- 2018/03/20 06:01 [medline]
PHST- 2018/03/20 06:00 [entrez]
AID - S0304-3894(18)30154-7 [pii]
AID - 10.1016/j.jhazmat.2018.03.010 [doi]
PST - ppublish
SO  - J Hazard Mater. 2018 Jun 5;351:277-284. doi: 10.1016/j.jhazmat.2018.03.010. Epub 
      2018 Mar 8.