PMID- 32430118
OWN - NLM
STAT- MEDLINE
DCOM- 20200710
LR  - 20200710
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 92
DP  - 2020 Jun
TI  - Effect of NOx and SO(2) on the photooxidation of methylglyoxal: Implications in 
      secondary aerosol formation.
PG  - 151-162
LID - S1001-0742(20)30055-3 [pii]
LID - 10.1016/j.jes.2020.02.011 [doi]
AB  - Methylglyoxal (CH(3)COCHO, MG), which is one of the most abundant alpha-dicarbonyl 
      compounds in the atmosphere, has been reported as a major source of secondary 
      organic aerosol (SOA). In this work, the reaction of MG with hydroxyl radicals 
      was studied in a 500 L smog chamber at (293 +/- 3) K, atmospheric pressure, 
      (18 +/- 2)% relative humidity, and under different NOx and SO(2). Particle size 
      distribution was measured by using a scanning mobility particle sizer (SMPS) and 
      the results showed that the addition of SO(2) can promote SOA formation, while 
      different NOx concentrations have different influences on SOA production. High 
      NOx suppressed the SOA formation, whereas the particle mass concentration, 
      particle number concentration and particle geometric mean diameter increased with 
      the increasing NOx concentration at low NOx concentration in the presence of 
      SO(2). In addition, the products of the OH-initiated oxidation of MG and the 
      functional groups of the particle phase in the MG/OH/SO(2) and MG/OH/NOx/SO(2) 
      reaction systems were detected by gas chromatography mass spectrometry (GC-MS) 
      and attenuated total reflection fourier transformed infrared spectroscopy 
      (ATR-FTIR) analysis. Two products, glyoxylic acid and oxalic acid, were detected 
      by GC-MS. The mechanism of the reaction of MG and OH radicals that follows two 
      main pathways, H atom abstraction and hydration, is proposed. Evidence is 
      provided for the formation of organic nitrates and organic sulfate in particle 
      phase from IR spectra. Incorporation of NOx and SO(2) influence suggested that 
      SOA formation from anthropogenic hydrocarbons may be more efficient in polluted 
      environment.
CI  - Copyright (c) 2020. Published by Elsevier B.V.
FAU - Wang, Shuyan
AU  - Wang S
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
FAU - Du, Lin
AU  - Du L
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China. Electronic address: lindu@sdu.edu.cn.
FAU - Tsona, Narcisse T
AU  - Tsona NT
AD  - School of Life Science, Shandong University, Binhai Road 72, Qingdao, 266237, 
      China.
FAU - Jiang, Xiaotong
AU  - Jiang X
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
FAU - You, Bo
AU  - You B
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
FAU - Xu, Li
AU  - Xu L
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
FAU - Yang, Zhaomin
AU  - Yang Z
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
FAU - Wang, Wenxing
AU  - Wang W
AD  - Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 
      266237, China.
LA  - eng
PT  - Journal Article
DEP - 20200225
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Aerosols)
RN  - 3352-57-6 (Hydroxyl Radical)
RN  - 722KLD7415 (Pyruvaldehyde)
SB  - IM
MH  - Aerosols
MH  - Gas Chromatography-Mass Spectrometry
MH  - *Hydroxyl Radical
MH  - Oxidation-Reduction
MH  - *Pyruvaldehyde
OTO - NOTNLM
OT  - Methylglyoxal
OT  - NOx
OT  - OH-Initiated oxidation
OT  - SO(2)
OT  - Secondary organic aerosol
COIS- Conflict of interest statement The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2020/05/21 06:00
MHDA- 2020/07/11 06:00
CRDT- 2020/05/21 06:00
PHST- 2019/11/28 00:00 [received]
PHST- 2019/12/16 00:00 [revised]
PHST- 2020/02/09 00:00 [accepted]
PHST- 2020/05/21 06:00 [entrez]
PHST- 2020/05/21 06:00 [pubmed]
PHST- 2020/07/11 06:00 [medline]
AID - S1001-0742(20)30055-3 [pii]
AID - 10.1016/j.jes.2020.02.011 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2020 Jun;92:151-162. doi: 10.1016/j.jes.2020.02.011. Epub 
      2020 Feb 25.