摘要
为了解长春市秋、冬季大气PM_(2.5)中多环芳烃(polycyclic aromatic hydrocarbons,PAHs)的污染特征,本研究采集了2020年9至12月10份大气PM_(2.5)样品,采用气相色谱-质谱法分析PM_(2.5)中多环芳烃的浓度。结果表明,采样期间7种多环芳烃的平均浓度由大到小依次是菲(2.49 ng/m^(3))、荧蒽(1.51 ng/m^(3))、苯并[g,h,i]苝(0.96 ng/m^(3))、苯并[k]荧蒽(0.74 ng/m^(3))、苯并[a]芘(0.68 ng/m^(3))、茚并芘(0.66 ng/m^(3))、蒽(0.23 ng/m^(3))。3环多环芳烃占总多环芳烃含量比例较高。燃煤和机动车尾气是长春市大气PM_(2.5)中多环芳烃的主要来源。长春市大气PM_(2.5)中多环芳烃的毒性当量均没有超过国家苯并[a]芘日均限值。长春市大气PM_(2.5)中多环芳烃对成人和儿童的终身致癌风险较低。
In order to understand the pollution characteristics of polycyclic aromatic hydrocarbons(PAHs)in PM_(2.5)during autumn and winter seasons in Changchun,PM_(2.5)samples were collected from September to December in 2020.The concentrations of 7 PAHs were determined by gas chromatography-mass spectrometry(GC-MS).The results showed that the mean concentrations of 7 PAHs ranked in the order of phenanthrene(PHE)(2.49 ng/m^(3)),fluoranthene(FLA)(1.51 ng/m^(3)),benzo[g,h,i]perylene(BghiP)(0.96 ng/m^(3)),benzo[k]fluoranthene(BkF)(0.74 ng/m^(3)),benzo[a]pyrene(BaP)(0.68 ng/m^(3)),indenopyrene(INcdP)(0.66 ng/m^(3)),anthracene(ANT)(0.23 ng/m^(3)).The concentrations of three-cyclic PAHs accounted for higher ratios of total PAHs concentrations than those of the other PAHs.Coal combustion and vehicle exhaust were the main sources of PAHs in PM_(2.5)in Changchun.The toxic equivalent of PAHs in PM_(2.5)in Changchun did not exceed the daily standard of BaP in China.Low incremental lifetime risks were found in adults and children of Changchun.
作者
罗馨雨
刘宝林(指导)
刘思序
尹方圆
袁琴
马丽丽
LUO Xin-yu;LIU Bao-lin;LIU Si-xu;YIN Fang-yuan;YUAN Qin;MA Li-li(College of Chemistry,Changchun Normal University,Changchun 130032,China)
出处
《长春师范大学学报》
2023年第2期191-195,共5页
Journal of Changchun Normal University
基金
吉林省大学生创新创业训练计划项目“长春市大气PM_(2.5)中重金属的污染特征分析”(S202110205053)。
关键词
PM
2.5
多环芳烃
污染特征
致癌风险评价
PM_(2.5)
polycyclic aromatic hydrocarbons(PAHs)
pollution characteristics
cancer risk assessment
