Ambient measurement of nitrotriphenylenes and possibility of nitrotriphenylene formation by atmospheric reaction
Ambient measurement of nitrotriphenylenes and possibility of nitrotriphenylene formation by atmospheric reaction
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硝基苯并菲的环境测量以及通过大气反应形成硝基苯并菲的可能性
DOI：
10.1021/es990553d
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发表时间：
2000
影响因子：
11.4
通讯作者：
K. Aika
中科院分区：
文献类型：
--
作者：
S. Ishii;Y. Hisamatsu;K. Inazu;M. Kadoi;K. Aika
氮氧化物对大气颗粒物中多环芳烃的硝化作用及其硝基多环芳烃的定性定量研究主要以含量较高的荧蒽和芘为对象。然而，这些硝基多环芳烃的直接致突变活性可以只占总的直接致突变活性的空气颗粒物样品的约20%，和未知的致突变硝基多环芳烃的存在被建议。1-和2-硝基三苯基首次在东京收集的环境颗粒物样品中进行了鉴定和定量。本文还用NO2/NO3/N2 O 5对苯并菲的致突变性和形成进行了实验室研究。在相同的样品中，1-和2-硝基三苯基的浓度远高于1-硝基芘。2-在菌株TA 98和YG 1024中，1-硝基苯并菲的致突变活性比1-硝基苯并菲高2个数量级以上（TA 98和YG 1024中1-硝基苯并菲的致突变活性分别为18和480个回复突变体/nmol，2-硝基苯并菲的致突变活性分别为3800和101700个回复突变体/nmol）。预计致突变性2-硝基苯并菲对空气颗粒物提取物的总致突变活性有很大贡献。此外，更有效地形成硝基三苯基苯夜间反应的苯并菲在O3的存在下，在黑暗中可以解释观察到的高浓度的硝基苯并菲在夜间样品。
Environmental nitration of PAHs by nitrogen oxides on airborne particulates and identification and quantification of nitro-PAHs in them have been studied on fluoranthene and pyrene because of their large abundance. However, the direct mutagenic activity of these nitro-PAHs can account for only up to about 20% of the total direct mutagenic activity of airborne particulate samples, and the presence of unknown mutagenic nitro-PAHs was suggested. 1- and 2-Nitrotriphenylenes were first identified and quantified in ambient particulate samples collected in Tokyo. Their mutagenicity and formation by laboratory reactions of triphenylene deposited on a filter with NO 2 /NO 3 /N 2 O 5 were also investigated. The concentrations of 1- and 2-nitrotriphenylenes were much higher than that of 1-nitropyrene in the same samples. 2-Nitrotriphenylene showed over 2 orders of magnitude greater mutagenic activity than 1-nitrotriphenylene in both strains TA98 and YG1024 (18 and 480 revertants/nmol for 1-nitrotriphenylene and 3800 and 101 700 revertants/nmol for 2-nitrotriphenylene in TA98 and YG1024). The mutagenic 2-nitrotriphenylene was expected to contribute largely to the total mutagenic activity of the extracts from airborne particulates. In addition, more effective formation of nitrotriphenylenes by the nighttime reaction of triphenylene in the presence of O 3 in the dark can explain the observation of high nitrotriphenylene concentration in the nighttime samples.