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- W2364574490 abstract "Size fractionated aerosol particles were collected with an Anderson cascade sampler at an offshore site of Nantong in October and November,2012.Ten types of water-soluble ions were analyzed by ion chromatography(IC,Metrohm Inc.Swiss).Results show that the mass concentrations of all the ions in PM10 and PM2.1 were 59.70μg/m3and 45.96μg/m3,respectively.The descending order of mass concentration for major ionic species in PM2.1 was:SO4 2-NO3-NH4 +Ca2+.SO4 2-,NH4 + and NO3- were found to contribute about 80% of total ionic concentrations in PM10,indicating that the secondary ionic species were major component in aerosol.SO4 2-,NH4 + and NO3- were unimodally distributed in particles,with a peak value in size-bin of 0.43~1.1μm.Ca2+,Na+ and Cl- exhibited bimodal distribution.Ca2+ showed the dominant peak at 4.7~3.3μm,while Cl- and Na+ exhibited the peak values in the size ranges of 0.43~1.1μm and 3.3~5.8μm.However,the maximum concentrations of Cl- and Na+ were located in different size ranges.The value of nss-SO4 2-/SO4 2 was higher than 90% in PM10,indicating that the terrestrial sources exert significant influence upon the sulfate aerosols of the offshore site.The ratios of nss-SO4 2-/NO3- were all higher than 1.0 for aerosol particles less than 2.1μm in diameter,indicating that the stationary sources were more important for ions in fine particles than vehicle emission in this region.The influence of vehicle emission on coarse particles should also be paid attention.Case study showed that the stable weather system and the transport of pollutants from inland regions with high pollutant emissions can explain the severe pollution episode occurred in October 27th." @default.
- W2364574490 created "2016-06-24" @default.
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- W2364574490 date "2014-01-01" @default.
- W2364574490 modified "2023-09-25" @default.
- W2364574490 title "Size distribution of water-soluble ions in aerosol from an offshore site of Nantong in autumn" @default.
- W2364574490 hasPublicationYear "2014" @default.
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