福州市大气PM_(10)中多环芳烃污染特征及其源解析

Pollution Characteristics and Sources of PM_(10)-bound Polycyclic Aromatic Hydrocarbons(PAHs)in the Atmosphere of Fuzhou City

对福州市4个不同功能区秋季、冬季和春季大气中PM10的浓度以及PM10中多环芳烃(PAHs)的含量进行了分析,结果表明,不同季节大气中PM10及PM10中PAHs的平均含量均为工业区>交通干道>住宅区>公园,且不同功能区均为冬季>春季>秋季。3个季节中,整个福州市PM10质量浓度在0.02~0.26 mg/m3之间,平均值为0.1 mg/m3,处于空气环境质量标准的二级标准内。PM10中∑PAHs质量浓度范围为未检出~33.1 ng/m3之间,平均值为10.4 ng/m3。PAHs组成中以高环为主,低环含量较低或低于检测限。PAHs主要来源于汽油的燃烧。

The concentrations of PM^o and PMx0-bound polycyclic aromatic hydrocarbons （PAHs） were analyzed in atmospheric samples collected from 4 various functional zones in autumn, winter and spring of Fuzhou. Results showed that average concentrations of PM^0 and PM^o-bound PAHs in atmospheric samples from various functional zones in every season were in the order of industrial areas〉communication roads〉residential areas〉parks, and those of in every functional zone were in the order of The mass concentration of PM^0 was in the range of 0.02~0.26 mg/m3 with an average of 0.1 mg/m3 in three seasons of Fuzhou, which met Grade I1 of national air quality standard. The mass concentration of PM^o-bound PAHs ranged from undetected to 33.1 ng/ma with an average value of 10.4 ng/m3. PAHs profile was predominant with high molecular weight PAl-Is. The concentration of low molecular weight PAlls was very low or below the detection limit. The main source of PAHs was from the burning of gasoline.