焦化厂区环境空气中多环芳烃的气固分布特征

doi:10.3969/j.issn.1671-7775.2013.02.019

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摘要采集山西省4个典型焦化厂区环境空气中气态和颗粒态样品,通过GCMS测定美国环保局优控的16种多环芳烃(PAHs)．焦化厂区16种PAHs质量浓度之和在3.739 6～18.161 0 μg·m-3之间,且随着焦炉高度的增大而减小,其中特征污染物苯并(a)芘质量浓度在0.008 9～0.099 8 μg·m-3之间．气相PAHs均值中萘和菲质量浓度较高,苯并(ghi)苝质量浓度最低;颗粒相中苯并(b)荧蒽质量浓度最高,蒽质量浓度最低;总PAHs中气相质量浓度较高,质量分数为87.2％.故应采取措施监控炼焦过程中萘和菲的排放．对PAHs的气固分配系数与液相饱和蒸汽压进行相关性分析,二者相关系数R2=0.95,斜率mr=-0.52,表明吸收机制是焦化厂区环境空气中PAHs在颗粒物上附着的主要原因．

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	刘效峰
	彭林
	白慧玲
	牟玲
	宋翀芳

关键词 ：多环芳烃, 焦化厂, 环境空气, 气固分配, BaP

Abstract：Gas and particlephase samples of ambient air in four typical coke plants were analyzed for EPAs 16 prioritycontrolled polycyclic aromatic hydrocarbons (PAHs) by gas chromatographymass spectrometry (GCMS). The total PAHs concentration ranges from 3.739 6 to 18.161 0 μg·m-3 with feature pollutant of benzo(a)pyrene from 0.008 9 to 0.099 8 μg·m-3. The concentration of PAHs decreases with the increase of coke oven height. The mean concentrations of naphthalene and phenanthrene are higher than those of other PAHs, while benzo(ghi)perylene is the lowest in the gasphase PAHs for four coke plants. The concentration of benzo(b)fluoranthene is the highest with the lowest anthracene concentration in particlephase. The concentration of gasphase PAHs is higher than that of particlephase PAHs, and the fraction of gasphase PAHs is 87.2％ of the total ones. Coke plants should take action to control the emissions of naphthalene and phenanthrene. There is a perfect correlation between gas／particle partition coefficients and subcooled liquid vapor pressure of PAHs with R2 of 0.95 and mr of -0.52. Absorption is the main mechanism of gas／particle partitioning for PAHs in the atmosphere of coke plant.

Key words： polycyclic aromatic hydrocarbon coke plant ambient air gas／particle distribution BaP

基金资助:

环保部环保公益性行业科研专项基金资助项目（200809027）；国家自然科学基金资助项目（41173002）

作者简介: 刘效峰（1977—），女，山西长治人，博士研究生，讲师(liufengyin@sina.com)，主要从事空气污染化学、环境有机化学的研究. 彭林（1966—），女，山西平遥人，教授，博士生导师（plin123@eyou.com），主要从事环境同位素地球化学的研究.

引用本文:

刘效峰, 彭林, 白慧玲, 牟玲, 宋翀芳. 焦化厂区环境空气中多环芳烃的气固分布特征[J]. 江苏大学学报（自然科学版）, 2013, 34(2): 228-233.

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http://zzs.ujs.edu.cn/xbzkb/CN/10.3969/j.issn.1671-7775.2013.02.019 或 http://zzs.ujs.edu.cn/xbzkb/CN/Y2013/V34/I2/228