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济南市大气细颗粒物中二(口恶)英污染水平及季节变化
Levels and Seasonal Variation of Dioxin in Atmospheric Fine Particle in Jinan City,China
投稿时间:2022-05-20  修订日期:2022-08-31
DOI:10.19316/j.issn.1002-6002.2023.06.07
中文关键词:  二(口恶)英  大气细颗粒物  季节变化  常规污染物  济南市
英文关键词:PCDD/Fs  atmospheric fine particle  seasonal variation  conventional pollutants  Jinan City
基金项目:山东省自然科学基金重大基础研究项目(ZR2020ZD21)
作者单位
孙俊玲 山东省生态环境监测中心, 山东 济南 250101 
郭文建 山东省生态环境监测中心, 山东 济南 250101 
李琳 山东省生态环境监测中心, 山东 济南 250101 
李彦 山东省生态环境监测中心, 山东 济南 250101 
张淼 山东省生态环境监测中心, 山东 济南 250101 
李红莉 山东省生态环境监测中心, 山东 济南 250101 
许杨* 山东省生态环境监测中心, 山东 济南 250101 
通讯作者:许杨*  山东省生态环境监测中心, 山东 济南 250101  
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中文摘要:
      2021年对济南市大气PM2.5中17种2,3,7,8氯取代二(口恶)英(PCDD/Fs)污染现状进行监测。对其异构体分布、指示性单体、季节变化规律等特征及其与常规污染物相关性进行了分析。结果表明:大气PM2.5中PCDD/Fs浓度范围和年平均值分别为0.157~1.595 pg/m3和0.785 pg/m3,而毒性当量(以I-TEQ计)范围和年平均值分别为0.009~0.116 pg TEQ/m3和0.052 pg TEQ/m3。PCDD/Fs浓度与毒性当量季节变化特征显著,均呈现出冬季>春季>秋季>夏季的情况,可能由季节性排放源和气象条件不同导致。不同季节PCDD/Fs异构体分布模式一致,主要由高氯代(1,2,3,4,6,7,8-HpCDF、OCDD、OCDF和1,2,3,4,6,7,8-HpCDD)单体组成;而对毒性当量贡献最大的单体是2,3,4,7,8-PeCDF,其与总毒性当量具有较好的相关性。同时,PCDD/Fs浓度与SO2、NO2、PM2.5等大气常规污染物呈显著正相关。这表明,大气PM2.5中PCDD/Fs与常规污染物的生成和排放密切相关。
英文摘要:
      The pollution profiles,indicated congeners and seasonal variations of 17 species,2,3,7,8 -PCDD/Fs in PM2.5 of Jinan were inves tigated from January to October 2021.Meanwhile,correlation analysis was conducted between PCDD/Fs and other air pollution parameters such as SO2,NO2,PM2.5.The results showed that the PCDD/Fs mass concentrations varied from 0.157 to 1.595 pg/m3 (annual average 0.785 pg/m3).Further,TEQ calculated by I-TEQ ranged from 0.009 to 0.116 pg TEQ/m3 (annual average 0.052 pg TEQ/m3).The significant seasonal changes were observed,higher levels appeared in winter than in summer,which might be affected by meteorological condition and emission source during the sampling period.The distribution of PCDD/Fs were temporally highly similar in four seasons,the dominant congeners were 1,2,3,4,6,7,8-HpCDF,OCDD,OCDF and 1,2,3,4,6,7,8-HpCDD,and the largest contributor to total TEQ was 2,3,4,7,8-PeCDF.The high correlation coefficients of the concentration of PCDD/Fs with that of SO2,NO2 and PM2.5 indicated that atmospheric PCDD/Fs might beclosely related to the generation and discharge of conventional pollutants.
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