PMID- 34801574
OWN - NLM
STAT- MEDLINE
DCOM- 20220126
LR  - 20220126
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 291
IP  - Pt 2
DP  - 2022 Mar
TI  - Aquatic photolysis of 2,4-dichloro-6-nitrophenol-the toxic nitrated byproduct of 
      2,4-dichlorophenol.
PG  - 132986
LID - S0045-6535(21)03458-5 [pii]
LID - 10.1016/j.chemosphere.2021.132986 [doi]
AB  - 2,4-Dichloro-6-nitrophenol (DCNP) is a toxic nitrated byproduct of 
      2,4-dichlorophenol (2,4-DCP) commonly found in agriculturally impacted waters 
      (e.g., paddy waters). DCNP has both genotoxicity and developmental toxicity and 
      can cause endocrine disrupting effects on aquatic species. Herein, we 
      investigated the photolysis of DCNP under UV(254) irradiation in aqueous 
      solutions. Results show that the anionic form of DCNP (DCNP(-)) is more 
      photoreactive than the neutral form (DCNP(0)) due to its higher molar absorption 
      coefficient and quantum yield. The presence of Suwannee River natural organic 
      matter (SRNOM) inhibits the direct photolysis of DCNP through light screening. A 
      series of photoproducts were identified by solid phase extraction (SPE) and high 
      resolution-mass spectrometry (HR-MS) analysis. The photolysis of DCNP generates 
      several photoproducts, including photoreduction, photonucleophilic substitution, 
      photoionization, and dimerization intermediates. The primary photochemical 
      mechanisms include photoionization from the singlet state and heterolytic C-Cl 
      bond splitting in the triplet state. This contribution may shed some light on the 
      photochemical transformation and fate of DCNP in UV-based engineering systems or 
      natural sunlit surface waters.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - Li, Yunong
AU  - Li Y
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China.
FAU - Qin, Hao
AU  - Qin H
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China.
FAU - Wang, Lixiao
AU  - Wang L
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China.
FAU - Lu, Junhe
AU  - Lu J
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China.
FAU - Chovelon, Jean-Marc
AU  - Chovelon JM
AD  - Univ Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626, 
      Villeurbanne, France.
FAU - Zhou, Quansuo
AU  - Zhou Q
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China. Electronic address: zhouquansuo@njau.edu.cn.
FAU - Ji, Yuefei
AU  - Ji Y
AD  - College of Resources and Environmental Sciences, Nanjing Agricultural University, 
      Nanjing, 210095, China. Electronic address: yuefeiji@njau.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20211118
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (2,4-dichloro-6-nitrophenol)
RN  - 0 (Chlorophenols)
RN  - 0 (Nitrates)
RN  - 0 (Nitrophenols)
RN  - 0 (Water Pollutants, Chemical)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Chlorophenols
MH  - Kinetics
MH  - *Nitrates
MH  - Nitrophenols
MH  - Photolysis
MH  - *Water Pollutants, Chemical/analysis/toxicity
OTO - NOTNLM
OT  - 2,4-Dichloro-6-nitrophenol
OT  - Photochemistry
OT  - Photolysis
OT  - Photoproducts
OT  - Quantum yield
EDAT- 2021/11/22 06:00
MHDA- 2022/01/27 06:00
CRDT- 2021/11/21 20:39
PHST- 2021/09/22 00:00 [received]
PHST- 2021/11/16 00:00 [revised]
PHST- 2021/11/17 00:00 [accepted]
PHST- 2021/11/22 06:00 [pubmed]
PHST- 2022/01/27 06:00 [medline]
PHST- 2021/11/21 20:39 [entrez]
AID - S0045-6535(21)03458-5 [pii]
AID - 10.1016/j.chemosphere.2021.132986 [doi]
PST - ppublish
SO  - Chemosphere. 2022 Mar;291(Pt 2):132986. doi: 10.1016/j.chemosphere.2021.132986. 
      Epub 2021 Nov 18.