Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Florence, Italy.
Environ Pollut. 2013 Sep;180:111-21. doi: 10.1016/j.envpol.2013.05.023. Epub 2013 Jun 5.
This study presents the chemical composition of VOCs in air and gas discharges collected at Nisyros Island (Dodecanese Archipelago, Greece). The main goals are i) to discriminate between natural and anthropogenic VOC sources and ii) to evaluate their impact on local air quality. Up to 63 different VOCs were recognized and quantitatively determined in 6 fumaroles and 19 air samples collected in the Lakki caldera, where fumarolic emissions are located, and the outer ring of the island, including the Mandraki village and the main harbor. Air samples from the crater area show significant concentrations of alkanes, alkenes, cyclic, aromatics, and S- and O-bearing heterocycles directly deriving from the hydrothermal system, as well as secondary O-bearing compounds from oxidation of primary VOCs. At Mandraki village, C6H6/Σ(methylated aromatics) and Σ(linear)/Σ(branched) alkanes ratios <1 allow to distinguish an anthropogenic source related to emissions from outlet pipes of touristic and private boats and buses.
本研究展示了在希腊多德卡尼斯群岛尼西罗斯岛（Nisyros Island）采集的空气和气体排放物中挥发性有机化合物（VOCs）的化学成分。主要目标是 i）区分自然和人为 VOC 来源，ii）评估它们对当地空气质量的影响。在 Lakki 火山口采集的 6 个喷气孔和 19 个空气样本中识别和定量确定了多达 63 种不同的 VOC，这些喷气孔位于 Lakki 火山口，而火山口位于岛屿的外环，包括 Mandraki 村和主要港口。来自火山口区域的空气样本显示出大量的烷烃、烯烃、环状、芳烃以及 S 和 O 杂环化合物，这些化合物直接来源于热液系统，还有来自初级 VOC 氧化的次级 O 杂环化合物。在 Mandraki 村，C6H6/Σ(甲基芳烃)和 Σ(直链)/Σ(支链)烷烃比值 <1 表明存在与旅游和私人船只和公共汽车出口管道排放有关的人为来源。
