PMID- 26387291
OWN - NLM
STAT- MEDLINE
DCOM- 20150925
LR  - 20181202
IS  - 0250-3301 (Print)
IS  - 0250-3301 (Linking)
VI  - 36
IP  - 6
DP  - 2015 Jun
TI  - [Pollution Characteristics and Light Extinction Effects of Water-soluble Ions in 
      PM2.5 During Winter Hazy Days at North Suburban Nanjing].
PG  - 1926-34
AB  - To investigate the characteristics of water-soluble ions in PM2.5 and their 
      contribution to light extinction in haze days, on-line monitoring of PM2.5. was 
      conducted at North Suburban Nanjing from 25 January through 3 February, 2013. 
      Water-soluble components were collected with a particle-into-liquid sampler 
      (PILS), and analyzed by ion chromatography (IC) for the contents of SO4(2-), 
      NO3-, NH4+, Cl-, Na+, K+, Mg2+ and Ca2+ Simultaneously particle size 
      distributions were measured using scanning mobility particle sizer (SMPS) and 
      Aerodynamic Particle Sizer (APS). The absorption and scattering coefficients were 
      measured by three-wavelength photoacoustic soot spectrometer (PASS-3). Trace 
      gases (SO2, NO2 etc.) were also monitored. The results showed that the average 
      concentrations of total water-soluble ions were 70.3 and 22.9 microg x m(-3) in 
      haze and normal days, respectively. Secondary hygroscopic components including 
      SO4(2-), NO3- and NH4+ were the major ionic pollutants. Hazy days favored the 
      conversion of SO2 and NOx, to SO4(2-) and NO3-, respectively, and in particular 
      the oxidation of NOx. Using multiple linear regression statistical method, the 
      empirical relationship between the dry aerosol extinction coefficient and the 
      chemical composition was established. NH4NO3 was found to be the largest 
      contributor to aerosol extinction in winter in Nanjing, followed by (NH4)2SO4, OC 
      and EC. In two heavy pollution events, the increase of ion concentrations was 
      influenced by the increase of primary emissions and secondary transformation.
FAU - Zhou, Yao-yao
AU  - Zhou YY
FAU - Ma, Yan
AU  - Ma Y
FAU - Zheng, Jun
AU  - Zheng J
FAU - Cui, Fen-ping
AU  - Cui FP
FAU - Wang, Li
AU  - Wang L
LA  - chi
PT  - Journal Article
PL  - China
TA  - Huan Jing Ke Xue
JT  - Huan jing ke xue= Huanjing kexue
JID - 8405344
RN  - 0 (Aerosols)
RN  - 0 (Air Pollutants)
RN  - 0 (Gases)
RN  - 0 (Ions)
RN  - 0 (Particulate Matter)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Aerosols
MH  - Air Pollutants/*analysis
MH  - China
MH  - Cities
MH  - Environmental Monitoring
MH  - Gases
MH  - Ions
MH  - Light
MH  - Particle Size
MH  - Particulate Matter/*analysis
MH  - Seasons
MH  - Solubility
MH  - Water
EDAT- 2015/09/22 06:00
MHDA- 2015/09/26 06:00
CRDT- 2015/09/22 06:00
PHST- 2015/09/22 06:00 [entrez]
PHST- 2015/09/22 06:00 [pubmed]
PHST- 2015/09/26 06:00 [medline]
PST - ppublish
SO  - Huan Jing Ke Xue. 2015 Jun;36(6):1926-34.