【摘 要】
：
Eighteen polycyclic aromatic hydrocarbons(PAHs)in PM2.5 collected near the NanjingOlympic Sport Center across the Asian Youth Games(AYG)period(from August 2 to August 28,2013)were analyzed using GC-MS
【机 构】
：
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing Univer
【出 处】
：
第21届中国大气环境科学与技术大会暨中国环境科学学会大气环境分会2015年学术年会
论文部分内容阅读
Eighteen polycyclic aromatic hydrocarbons(PAHs)in PM2.5 collected near the NanjingOlympic Sport Center across the Asian Youth Games(AYG)period(from August 2 to August 28,2013)were analyzed using GC-MS.Their levels,sources and health risks to human are discussed.Results showed that the total concentrations of PAHs in PM2.5 were 9.43,7.21 and 8.83 ng m-3 forpre-(August 3-15),during-(August 16-24)and post-(August 25-28)AYG periods,respectively.They were dominated by 5-ring and 6-ring PAHs.Total PAHs concentration during AYG periodin PM2.5 decreased by 24%,when compared with those for pre-AYG period.Forcombustion-derived PAHs and carcinogenic PAHs,they decreased by 26%and 21%,respectively.It implied that the pollution control measures implemented during the AYG can effectively reducethe emission of PAHs from various sources.The poor correlations between PAHs andmeteorological parameters also favored that the variations of PAHs are raised by the changes ofemission sources.Diagnostic ratios and principal component analysis revealed that vehicleemission and coal combustion were the predominant contributors,with minimal effects frombiomass burning and petroleum.The health risks for human exposed to PAHs in PM2.5 werequantitatively assessed by BaP equivalent concentration(BaPeq)and the incremental lifetimecancer risk(ILCR).The estimated ILCR for PAHs during the AYG periods decreased by 0.28 and1.39 per 1,000,000 exposed children and adults than those for the the pre-AYG,respectively.Itindicateed that the pollution control measures reduced the risks of PAHs to sportsmen or humangathered around the Olympic Sport Center.
其他文献
Particulate matter(PM)remains as a serious air quality problem in megacities inthe Pearl River Delta(PRD)economic region in South China.Guangzhou,located in the PRDregion,has been suffering from indus
The Pearl River Delta(PRD)region in South China is one of the mosteconomically developed regions in China while also noted for its severe air pollution,especiallyduring the winter season.In order to c
Non-refractory submicron aerosol is characterized using an Aerosol ChemicalSpeciation Monitor(ACSM)in the fall and winter seasons of 2013 at the roadside in an Asianmegacity environment in Hong Kong.O
For about one month from May 18 through June 12 during the 2015 KORUS-AQpre-campaign period,nitrogen compounds(NO,NO2,NOy),O3,CO and SO2 were measured at theKIST(Korea Institute of Science and Technol
O3 and its precursors(NOx,CO,SO2)were measured at six heights of a 40 mtower at Taehwa Research Forest near Seoul Metropolitan Areas during 2011~2014.Volatileorganic compounds(VOCs)were measured using
Ozone(O3)and Secondary organic aerosol(SOA)are important pollutants in theurban atmosphere.Benzene is one of the most important aromatic precursors,which couldproduce O3 and SOA in the presentence of
The frequent occurrence of regional air pollution makes it challenging to control.Based on sensitivity research performed with the Chinese Unified Atmospheric ChemistryEnvironment(CUACE)model and the
Particulate matter(PM)pollution has led to great scientific,governmental andpublic concerns due to its adverse effects on air quality and human health.Among all theconstituents in particle matter,orga
This study focuses on the importance of initial conditions in air-quality prediction.Assimilation experiments are employed using WRF-Chem model and Grid-point StatisticalInterpolation(GSI)for a 9-day
O3 is mainly produced by photochemical reaction of the nitrogen oxides(NO+NO2= NOx)emitted from vehicles and VOCs.H2O2 plays a role as a reservoir for amounts of HOx andNOx which triggers increasing o