摘要
采集广州五山和荔湾（2002-03-12-2003-06-31）PM10样品,并对冬、夏两季灰霾和非灰霾期间大气颗粒物中的PAHs进行分析.广州市灰霾期间PAHs污染程度严重,特别是冬季灰霾期.广州市夏季灰霾期间菲、蒽、荧蒽、芘、苯并[a]蒽、、茚并[1,2,3-cd]芘、二苯并[ah]蒽和苯并[ghi]比非灰霾期间相对浓度高,而冬季灰霾期间苯并[a]荧蒽、苯并[e]芘、苯并[a]芘、、茚并[1,2,3-cd]芘、二苯并[ah]蒽和苯并[ghi]比非灰霾期间的相对浓度高.夏季非灰霾、夏季灰霾、冬季非灰霾和冬季灰霾期间的BEQ值分别为3.5、3.35、1.43和13.0 ng·m^-3,与国内外各大城市相比,广州市夏季非灰霾、冬季非灰霾和夏季灰霾期间的BEQ值（平均值为2.76 ng·m^-3）在国内处于较低水平,与国外城市基本相当.冬季灰霾期间的BEQ值在国内城市中处于较高水平,说明广州冬季灰霾对人体健康的威胁比较严重.此外,诊断参数法研究还表明夏季PAHs主要为汽油车和柴油车的混合排放,冬季PAHs的主要来源于柴油车排放和燃煤;冬季非灰霾期间PAHs一部分来自于本地排放,另一部分可能来自北方的长距离传输.
PM10 （particulates matter with aerodynamic diameter 〈 10μm） samples were collected at Liwan and Wushan site in Guangzhou city between March 2002 and June 2003. Polycyclic aromatic hydrocarbons （PAHs） were studied during haze and non-haze periods in both summer and winter. PAHs pollution was serious in haze period compared with that in non-haze period, especially in winter. Compared with non-haze period, Phe, Ant, Flu, Pyr, BaA, Chr, IcdP, DahA and BghiP were more abundant in haze period in summer, and BaF, BeP, BaP, Pery, IcdP, DahA and BghiP were more abundant in haze period in winter. The BEQ values were 3.5 ng·m^-3 , 3.35 ng·m^-3 , 1.43 ng·m^-3 and 13.0 ng·m^-3 in non-haze in summer, in haze in summer, in non-haze in winter and in haze in winter, respectively. The BEQ values in non-haze in summer, in haze in summer and in non-haze in winter in Guangzhou （average： 2.76 ng·m^-3） were relatively low in Chinese cities, and comparable with oversea cities. However, the BEQ value in haze in winter was relatively high in Chinese cities. It indicated that haze in winter would impair human health seriously. The diagnostic ratios suggested gasoline and diesel vehicle emission were main sources of PAHs in summer, and diesel vehicle and coal combustion emission were main sources of PAHs in winter; PAHs may come from both local sources and long-range transportation in non-haze in winter.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2009年第6期1574-1579,共6页
Environmental Science
基金
国家自然科学基金项目(40343006)
中国博士后科学基金项目(20060390062)
中国科学院有机地球化学国家重点实验室开放基金项目(OGL-200610)
关键词
可吸入颗粒物
多环芳烃
灰霾
广州
健康效应
PM10
polycyclic aromatic hydrocarbons（PAHs）
haze
Guangzhou
health effect
