室内燃香固相多环芳烃(PAHs)的排放特征

Emission Characteristic of Polycyclic Aromatic Hydrocarbons (PAHs) Adsorbed on Solid Phase PM10 from Indoor Incense Burning

为了解室内燃香固相PM10上吸附的多环芳烃(Polycyclic aromatic hydrocarbons, PAHs)的排放状况,在洁净环境舱内对7种香燃烧释放的颗粒物PM_(10)中的PAHs的排放特征进行了研究。结果表明:1)7种燃香释放固相(PM_(10))PAHs的排放因子在0.79～3.44μg/(g·incense)内,实验香中线香的排放因子大于枝香的排放因子,且绿色天然和标注为环保无烟香的为最低;2)PM_(10)上吸附的PAHs主要分布在3环和4环上,所占比例为73.1%～90.8%;3)燃香颗粒相PAHs中菲(Phe)所占比例与其他室内燃烧源释放的PAHs中Phe所占比例的差异明显,菲可作为燃香的特征个体PAHs;4)单值特征比值表明燃香源可与木材源划分为同类燃烧源,且可通过Phe/Ant和Pyr/BaP的比值来区分燃香源和木材源。研究结果有助于了解燃香释放PM_(10)上PAHs的分布规律,为后续深入研究室内燃烧源释放不同粒径段颗粒物上PAHs的分布和源解析及健康影响提供基础数据。

To understand the emissions of polycyclic aromatic hydrocarbons (PAHs)adsorbed on solid phase PM10 from incense burning in indoor environment.The emission characteristics of PAHs on PM10 from 7 different kinds of incense burning were studied.The results showed that:1)Emission factors of PAHs on PM10 from these incenses were in the range of 0.79-3.44μg/(g·incense).Generally,the emission factors of PAHs from jossstick incenses were higher than those from stick incenses,and the emission factors of natural incenses were the lowest.2)The particle phase PAHs of 7 kinds of incenses were mainly distributed in the PAHs with 3 and 4 rings, and the proportion processing total PAHs was between 73.1%and 90.8%.3)Due to the obvious difference of the proportion of Phe in the PAHs between 7 kinds of incenses and other indoor combustion sources,Phe can be regarded as the individual characteristic PAHs of incense burning.4)The single value characteristic ratio indicated that the measured incense burning and wood can be divided into the same kind of combustion source,and the source of wood and incense may be distinguished by the ratio of Phe/Ant and Pyr/BaP.The initial results are helpful to understand the distribution pattern of PAHs on PM10 released from incense burning,and to provide the basic data for the further studies on PAHs distribution on particles with different sizes from indoor combustion source,source apportionment and health effects of PAHs.