摘要
为研究上海市公园绿地玻璃表面多环芳烃(PAHs)的污染特征及污染源,利用气相色谱-质谱联用仪(GC-MS)对16种优控PAHs质量浓度进行了测定,对玻璃表面PAHs质量浓度的季节分布,组成特征和潜在污染源进行了分析.此外,利用毒性当量因子(TEFs)对玻璃表面PAHs进行了毒性当量分析.结果表明,玻璃表面PAHs面积归一化质量浓度在83.6—1689.6 ng·m^(−2)之间,呈现夏季(599.7 ng·m^(−2))>秋季(533.1 ng·m^(−2))>春季(464.2 ng·m^(−2))>冬季(351.4 ng·m^(−2)).PAHs组成特征季节差异明显,4环PAHs在春季(43%)和冬季(42%)的占比最高;而2+3环PAHs在秋季(57%)和夏季(46%)占比最高.BghiP与T-PAHs强相关性说明汽车尾气是玻璃表面PAHs的主要贡献源;异构体比值表明不同季节玻璃表面PAHs主要污染源相对稳定,即为汽车尾气和扬尘源(降尘和裸露表土).质量归一化处理后的7种致癌性PAHs的质量浓度范围为58.3—1311.8 ng·g^(−1),TEQ的浓度在夏季(466.6 ng·g^(−1))>春季(361.0 ng·g^(−1))>秋季(262.9 ng·g^(−1))>冬季(214.6 ng·g^(−1)).BaP、DahA和B[b+k]F是主要的致癌单体PAH,共计占TEQ浓度的80%—91%.
In order to study the pollution characteristics and pollution sources of polycyclic aromatic hydrocarbons(PAHs)on the glass surfaces in the Shanghai park green space,the mass concentrations of 16 types of PAHs were determined by gas chromatography-mass spectrometry(GC-MS),the seasonal distribution,composition characteristics and potential pollution sources of PAHs on the glass surface were analyzed.In addition,the toxic equivalent factors(TEFs)were used to analyze the toxic equivalents of PAHs on the glass surface.The results showed that the area-normalized mass concentrations of PAHs on the glass surface ranged from 83.6 to 1689.6 ng·m^(−2),with the following characteristics:summer(599.7 ng·m^(−2))>autumn(533.1 ng·m^(−2))>spring(464.2 ng·m^(−2))>winter(351.4 ng·m^(−2)).The seasonal deviations in the PAH compositions were evident,such that the proportion of 4-ring PAHs was maximized in spring(43%)and winter(42%).In comparison,the amounts of 2+3 rings accounted for the highest proportion in autumn(57%)and summer(46%).The strong correlation between BghiP and T-PAHs indicated that automobile exhaust gases were the primary contributing source of PAHs on the glass surface.Furthermore,the isomer ratios indicated that the primary pollution sources,including automobile exhaust gases and dust sources(dust fall and exposed topsoil),were relatively unchanged in different seasons.The mass concentrations of seven carcinogenic PAHs after mass-normalization ranged from 58.3 ng·g^(−1)to 1311.8 ng·g^(−1),while the concentration of TEQ followed the order of summer(466.6 ng·g^(−1))>spring(361.0 ng·g^(−1))>autumn(262.9 ng·g^(−1))>winter(214.6 ng·g^(−1)).BAP,DahA and B[b+k]F were the main carcinogenic monomers of PAHs,accounting for 80%—91%of the TEQ concentration.
作者
于英鹏
李传武
朱天明
梁峰
刘敏
YU Yingpeng;LI Chuanwu;ZHU Tianming;LIANG Feng;LIU Min(Tourism Research Centre,Wuxi Institute of Technology,Wuxi,214121,China;North Jiangsu Institute of Agricultural and Rural Modernization,Yancheng Teachers University,Yancheng,224007,China;Yancheng Institute of Urban Rural Integration and Development,Yancheng Teachers University,Yancheng,224007,China;Key Laboratory of Geographic Information Science,Ministry of Education,East China Normal University,Shanghai,200241,China;School of Geographic Sciences,East China Normal University,Shanghai,200241,China;Key Laboratory of Spatial-temporal Big Data Analysis and Application of Natural Resources in Megacities,Ministry of Natural Resources,Shanghai,200241,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第9期2969-2977,共9页
Environmental Chemistry
基金
国家自然科学基金(41730646)
江苏高校哲学社会科学研究重点项目(2018SJZDI080)
江苏省高等学校自然科学研究面上项目(20KJB170030)资助.
关键词
城市公园
玻璃表面
多环芳烃
污染水平
上海
urban park
glass surface
polycyclic aromatic hydrocarbons
pollution level
Shanghai
作者简介
通信联系人:刘敏,E-mail:mliu@geo.ecnu.edu.cn。
