摘要
为研究机动车尾气排放多环芳烃的排放特征，以及其从源到汇的过程变化，该研究选取珠江隧道为研究区域，采集了2006年4月、7月和12月珠江隧道中气相和颗粒相样品，以及7月、12月份隧道附近的大气样品，并对样品中多环芳烃（PAHs）进行检测。结果表明，隧道中ρPAHs范围为896．1ng．m^-3～4066．2ng·m^-3，气相中ρPAHs远远高于颗粒相ρPAHs。环境大气样品中ρPAHs为207．9ng·m^-3-353．0ng·m^-3，远远低于隧道里ρPAHs，其中PAHs各组分的分布特征与隧道中样品相似，说明汽车尾气是广州市大气中PAHs的重要来源；最后通过隧道中与隧道口的ρPAH。来计算汽车的排放因子，得出PAHs排放因子平均值为：2164．7μg·km^-1．辆^-1，并且估算出2006年广州市全年汽车尾气排放出PAHs82t。
This research aimed to fred out the vehicle emission character of the Polycyclic aromatic hydrocarbons, as well as the process from source to receptor. This research chose the Pearl River tunnel as the research area. And collected April, July, December Pearl River Tunnel samples, including particulate and gaseous phase, as well as the ambient air samples. The PAHs concentrations of the tunnel samples ranged from 896.1 ng·m^-3 to 4 066.2 ng·m^-3; PAHs in gaseous phase were far higher than those in the particulate phase. Compared to the ambient air samples＇ concentrations, which was ranged from 207.9 ng·m^-3-353.0 ng·m^-3, the ambient air samples＇ concentrations were far lower than the tunnel samples＇. The PAHs congeners distribution of the ambient air samples was similar to the tunnel samples. It indicates that automobile emission is a very important source of PAHs in Guangzhou atmosphere. Utilizing the data of the tunnel samples, the emission factor （EF） was calculated. The EF of PAHs in Guangzhou was 2164.7 ug·km^-1.vehicle^-1. According to these EF data, the PAHs emission from automobiles in Guangzhou was estimated as 82 t per year.
出处
《生态环境》
CSCD
北大核心
2008年第1期138-142,共5页
Ecology and Environmnet
基金
国家自然科学基金委项目(40332019)
