PMID- 20387875
OWN - NLM
STAT- MEDLINE
DCOM- 20100624
LR  - 20131121
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 44
IP  - 9
DP  - 2010 May 1
TI  - Heterogeneous reactivity of suspended pirimiphos-methyl particles with ozone.
PG  - 3311-6
LID - 10.1021/es9029599 [doi]
AB  - Pirimiphos-methyl (PMM) is a widely used pesticide that can be released into the 
      atmosphere in the gas phase and the condensed phase. The reaction of suspended 
      PMM particles with ozone is investigated using an online vacuum ultraviolet 
      photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS) and a 
      scanning mobility particle sizer (SMPS). The reactions are conducted in an 180 L 
      reaction chamber. The identification of particulate products detected with 
      VUV-ATOFMS is proposed on the basis of GC-MS analysis of PMM ozonation products 
      in methylene dichloride solution. The heterogeneous reactive rate constant of PMM 
      with azelaic acid as matrix under room temperature (293 +/- 2 K) is (1.97 +/- 
      0.25) x 10(-17) cm(3) molecules(-1) s(-1). The corresponding lifetime at 100 ppbv 
      of ozone is 5.2 +/- 0.66 h, and the reactive uptake coefficient (gamma) for ozone 
      on PMM particles is (8.5 +/- 1.1) x 10(-4). Additionally, ozonation of PMM vapor 
      is conducted, and the rapid formation of secondary organic aerosol (SOA) is 
      observed in the homogeneous ozonation of gas-phase PMM. The experimental results 
      indicate that ozone is an important atmospheric oxidant for the transformation of 
      PMM in the atmosphere.
FAU - Yang, Bo
AU  - Yang B
AD  - Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 
      Beijing 100085, China. jshu@rcees.ac.cn
FAU - Zhang, Yang
AU  - Zhang Y
FAU - Meng, Junwang
AU  - Meng J
FAU - Gan, Jie
AU  - Gan J
FAU - Shu, Jinian
AU  - Shu J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Aerosols)
RN  - 0 (Air Pollutants)
RN  - 0 (Organothiophosphorus Compounds)
RN  - 0 (Oxidants)
RN  - 0 (Particulate Matter)
RN  - 0 (Pesticide Residues)
RN  - 29232-93-7 (pirimiphos methyl)
RN  - 66H7ZZK23N (Ozone)
SB  - IM
MH  - Aerosols/chemistry
MH  - Air Pollutants/analysis
MH  - Atmosphere
MH  - Gas Chromatography-Mass Spectrometry/methods
MH  - Mass Spectrometry/methods
MH  - Models, Chemical
MH  - Organothiophosphorus Compounds/analysis/*chemistry
MH  - Oxidants/chemistry
MH  - *Ozone
MH  - Particle Size
MH  - Particulate Matter
MH  - Pesticide Residues/*chemistry
MH  - Temperature
MH  - Time Factors
EDAT- 2010/04/15 06:00
MHDA- 2010/06/25 06:00
CRDT- 2010/04/15 06:00
PHST- 2010/04/15 06:00 [entrez]
PHST- 2010/04/15 06:00 [pubmed]
PHST- 2010/06/25 06:00 [medline]
AID - 10.1021/es9029599 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2010 May 1;44(9):3311-6. doi: 10.1021/es9029599.