Distributions and multiple sources of chlorinated polycyclic aromatic hydrocarbons in the air over Japan
Distributions and multiple sources of chlorinated polycyclic aromatic hydrocarbons in the air over Japan
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DOI：
10.1016/j.scitotenv.2018.08.302
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发表时间：
2019-02-01
影响因子：
9.8
通讯作者：
Nakajima, Daisuke
中科院分区：
文献类型：
--
作者：
Ohura, Takeshi;Suhara, Takeshi;Nakajima, Daisuke
在日本不连续地点的空气中检测到了氯化多环芳烃(ClPAHs)，但没有关于其在日本各地分布的信息。这项研究是对日本全境大气中氯代多环芳烃浓度的广泛调查。在所有采样点的气相或颗粒相中都检测到了24种ClPAHs。这些浓度与人口密度的相关性很弱。ClPAHs和PAHs总浓度之间的关系表明，在接近70%的地点，大气中的ClPAHs来自于共同的多环芳烃来源。基于1-氯并[a]菲、7-氯苯并[a]菲和6-氯苯并[a]芘归一化为3-氯荧蒽的诊断比率的三元图表明，垃圾燃烧可能是夏季ClPAHs的来源，而车辆排放和燃煤可能是冬季ClPAHs的来源。根据每个地点的个别化合物浓度估计的热图分析表明，这些地点有三类来源：一)具有中等影响的氯多环芳烃和多环芳烃的共同来源，二)具有较高影响的氯多环芳烃和多环芳烃的共同来源，以及三)特定来源的氯多环芳烃。(C)2018爱思唯尔B.V.保留所有权利。
Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) have been detected in the air at discrete sites in Japan, but there is no information on their distributions throughout Japan. This study was a widespread survey of atmospheric concentrations of ClPAHs throughout Japan. The majority of 24 species of ClPAHs were detected in either the gas or particle phase at all sampling sites. The concentrations were weakly related to human population densities. The relationships between total concentrations of ClPAHs and PAHs suggested that atmospheric ClPAHs at similar to 70% of the sites were derived from common sources of PAHs. A ternary diagram based on diagnostic ratios of 1-chloropyrene, 7-chlorobenz[a]anthracene, and 6-chlorobenzo[a]pyrene normalized to 3-chlorofluoranthene suggested that waste combustion was the likely source of ClPAHs in summer and that vehicular emissions and coal burning were the likely sources of ClPAHs in winter. A heat map analysis estimated from the concentrations of individual compounds at each site suggested that there were three categories of sources at the sites: i) common sources of ClPAHs and PAHs that had moderate impacts, ii) common sources of ClPAHs and PAHs that had high impacts, and iii) specific sources of ClPAHs. (C) 2018 Elsevier B.V. All rights reserved.