Behavior and source characteristic of PCBS in urban ambient air of Yokohama, Japan
Behavior and source characteristic of PCBS in urban ambient air of Yokohama, Japan
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DOI：
10.1016/j.envpol.2005.03.011
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发表时间：
2005-11-01
影响因子：
8.9
通讯作者：
Masunaga, S
中科院分区：
文献类型：
--
作者：
Kim, KS;Masunaga, S
为了了解环境空气中多氯联苯的行为和来源，于2002年3月至2003年2月在日本横滨市测量了气相和颗粒相的浓度。总多氯联苯浓度为62~250pg/m(3)，TEQ为2~14fgTEQ/m(3)。得到了气固分配系数(K-p)随温度的变化规律。还建立了分配系数与过冷液体蒸汽压(P-L)之间的关系(除3个样品外，logK-p与109P-L图的决定系数均为0.76)。因此，可以在任意温度下估计气相和颗粒相的多氯联苯的分配比。将主成分分析方法应用于环境空气中多氯联苯的来源识别。以四氯苯和十氯苯之间的122个同系物的浓度作为输入变量，得到了3个特征值大于10的化合物。主成分1(PC1)解释了总方差的43.4%，并被解释为多氯联苯污染的多氯联苯产品和/或场地的挥发。多氯联苯同系物浓度与PC1浓度密切相关，PC1浓度与温度高度相关。PC2占22.3%，可解释为焚烧来源的多氯联苯；PC3占10.8%，但无法解释。(C)2005爱思唯尔有限公司。保留所有权利。
To understand the behavior and sources of polychlorinated biphenyls (PCBs) in ambient air, gaseous and particulate phase concentrations were measured at Yokohama City, Japan, during March 2002 and February 2003. The concentration of total PCB and TEQ ranged from 62 to 250 pg/m(3) and from 2 to 14 fgTEQ/m(3), respectively. The gas-particle partition coefficient (K-p) was obtained as a function of temperature. The relationship between the partition coefficient and the sub-cooled liquid vapor pressure (P-L) was also established (coefficients of determination for log K-p versus 109 P-L plot were > 0.76, except for three samples). As a result, the partition ratio of gaseous and particulate phase PCBs can be estimated for an arbitrary temperature. Principal component analysis (PCA) was applied to the source identification of PCBs in ambient air. The concentrations of 122 congeners between tetra-CBs and deca-CB were used as input variables, and three PCs with eigenvalue more than 10 were obtained. The principal component 1 (PC 1) accounted for 43.4% of the total variance, and was interpreted as volatilization from PCB products and/or sites polluted by PCBs. The concentrations of PCB congeners were strongly related with PC 1 which showed high correlation with temperature. PC 2 accounted for 22.3%, and was interpreted as PCBs from incineration sources, while PC 3 accounted for 10.8%, but could not be interpreted. (c) 2005 Elsevier Ltd. All rights reserved.