Atmospheric distribution of particulate- and gas-phase phthalic esters (PAEs) in a Metropolitan City, Nanjing, East China
Atmospheric distribution of particulate- and gas-phase phthalic esters (PAEs) in a Metropolitan City, Nanjing, East China
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华东南京市某大城市大气中颗粒物和气相邻苯二甲酸酯（PAE）的分布
DOI：
10.1016/j.chemosphere.2008.04.032
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发表时间：
2008-08-01
期刊：
影响因子：
8.8
通讯作者：
Fan, C. Q.
中科院分区：
文献类型：
--
作者：
Wang, P.;Wang, S. L.;Fan, C. Q.
邻苯二甲酸酯（PAEs）用于许多工业部门，在世界各地大量生产。对南京地区PAEs的颗粒气相分布进行了研究。2005年4月、7月、10月和2006年1月在距地面1.5 m处连续10天每天12 h （8:00 am - 8:00 pm）采样。为便于比较，采样活动在两个站点同时进行，一个在市中心，另一个在距离市中心约12公里处进行郊区背景监测。结果发现，PAE基团中含量最多的成员是邻苯二甲酸二甲酯（DMP）（平均10.1 ng m(-3)）、邻苯二甲酸二乙酯（DEP） （3.4 ng m(-3)）、邻苯二甲酸二丁酯（DBP） （58.8 ng m(-3)）、邻苯二甲酸丁苄酯（BBP） （3.2 ng m(-3)）、邻苯二甲酸二乙己酯（DEHP） （20.3 ng m(-3)）和邻苯二甲酸二辛酯（DOP） （1.2 ng m(-3)）。气相PAEs对PAE总浓度（Sigma(6)PAE， 6种PAE同系物的总和）的平均贡献范围为75.0% ~ 89.2%。颗粒相和气相Sigma(6)PAE浓度均随温度升高而降低。实验测定的PAEs的气粒分配（K-p）与其蒸汽压有很好的相关性。城市地区的Sigma(6)PAE水平几乎是郊区车站的3.5倍。距地面1.5 ~ 30.0 m的垂直剖面显示出轻微的高度依赖性。(C) 2008 Elsevier Ltd版权所有。
Phthalic acid esters (PAEs) are used in many branches of industry and are produced in huge amounts throughout the world. An investigation on particulate- and gas-phase distribution of PAEs has been conducted in Nanjing (China). The 12-h daily sampling program (from 8:00 am to 8:00 pm) for ten consecutive days was conducted in April, July and October 2005, and in January 2006 at about 1.5 m above the ground level. For comparative purposes, sampling events were simultaneously conducted at two stations, one at the urban center and the other about 12 km from city center for suburban background monitoring. It was observed that the most abundant members of the PAE group were dimethyl phthalate (DMP) (10.1 ng m(-3), average), diethyl phthalate (DEP) (3.4 ng m(-3)), dibutyl phthalate (DBP) (58.8 ng m(-3)), butylbenzyl phthalate (BBP) (3.2 ng m(-3)), di-2-ethylhexyl phthalate (DEHP) (20.3 ng m(-3)) and di-n-octyl phthalate (DOP) (1.2 ng m(-3)). The average contribution of PAEs in the gas phase to the total PAE concentration (Sigma(6)PAE, sum of six PAE congeners) ranged from 75.0% to 89.2%. Both particulate- and gas-phase Sigma(6)PAE concentrations decreased with increasing temperature. Experimentally determined gas-particle partitioning (K-p) of PAEs is well-correlated with their vapor pressure. The Sigma(6)PAE levels in the urban area are similar to 3.5 times as high as the levels found at the suburban station. The vertical profiles from 1.5 to 30.0 m above the ground display slight height dependence. (C) 2008 Elsevier Ltd. All rights reserved.