杭州市居室空气中芳香族化合物污染现状及其来源解析

Source apportionment and pollution survey of aromatic compounds in indoor air of Hangzhou

用热解吸/气质联用技术研究了杭州市居室空气中芳香族化合物的组成。结果表明,杭州市居室空气中共存在60种芳香族化合物,其中苯系化合物48种,非苯芳香族化合物12种,检出率大于50%的23种;苯、甲苯、乙苯、苯乙烯、邻二甲苯、间(对)-二甲苯等10种化合物的总含量之和大于85.39%,是室内空气中主要的芳香族污染物,除萘外,其他22种污染物的平均浓度值均随装修时间间隔延长而降低;污染物主要来源是室内装修过程中使用的或装修材料中残留的有机溶剂、机动车辆排放的尾气、居民家庭中常用的清洁用品及含萘等成分的防蛀剂。

The aromatic compounds in indoor air of Hangzhou have been researched with the method of desorption and GC/MS. The results show that 60 aromatic compounds exist in indoor air, which include 48 benzene series and 12 other aromatic compounds, the inspection rates of 23 compounds thereinto are over 50 % ; The concentrations of other 22 compounds gradually descended with time except naphthalene. Comparing to the cities of aative or overseas, the pollution of aromatic compounds in indoor air of Hangzhou is higher than overseas cities, but lower than native cities. The main polluting sources may be automobile exhaust, the organic compounds remaining in the decorating material and cleansing usually used in family.