Hydrogen sulfide (H2S) in urban ambient air
Hydrogen sulfide (H2S) in urban ambient air
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DOI：
10.1016/j.atmosenv.2008.05.066
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发表时间：
2008-10
影响因子：
5
通讯作者：
K. Kourtidis;A. Kelesis;M. Petrakakis
中科院分区：
文献类型：
--
作者：
K. Kourtidis;A. Kelesis;M. Petrakakis
尽管有迹象表明，在一些城市环境中的高硫化氢水平，只有稀疏的测量已在文献中报道。在这里，我们提出了一个完整的一年的硫化氢测量在塞萨洛尼基市，希腊的城市交通网站。在这座拥有100万人口的城市中，硫化氢浓度惊人地高，年平均浓度为8μgm− 3，冬季月平均浓度高达20μgm−3（12.9ppb）。冬季的日平均浓度高达30μgm−3（19.3ppb），而小时浓度则高达54μgm−3（34.8ppb）。在无风（风速<0.5ms−1）条件下，主要在夜间出现，H2S的小时值与CO（r2=0.75）和SO2（r2=0.70）的小时值高度相关，表明催化转化器是一个常见的交通源。年平均浓度高于世界卫生组织建议的气味烦恼，因此，硫化氢可能发挥作用的恶臭事件，城市偶尔经历。高的环境H2S水平也可能与户外大理石和石灰石历史古迹的保护工作有关，这些古迹一直将SO2排放作为大气酸度来源，因为这里提出的测量表明，塞萨洛尼基每年约有19%的硫（SO2+H2S）排放是以H2S的形式存在的。
Despite indications of high hydrogen sulfide levels in some urban environments, only sparse measurements have been reported in the literature. Here we present one full year of hydrogen sulfide measurements in an urban traffic site in the city of Thessaloniki, Greece. In this 1-million-population city the H2S concentrations were surprisingly high, with a mean annual concentration of 8μgm−3and wintertime mean monthly concentrations up to 20μgm−3(12.9ppb). Daily mean concentrations in the winter were up to 30μgm−3(19.3ppb), while hourly concentrations were up to 54μgm−3(34.8ppb). During calm (wind velocity<0.5ms−1) conditions, mainly encountered during night-time hours, hourly values of H2S were highly correlated with those of CO (r2=0.75) and SO2(r2=0.70), pointing to a common traffic source from catalytic converters. Annual mean concentrations are above the WHO recommendation for odor annoyance; hence, H2S might play a role to the malodorous episodes that the city occasionally experiences. The high ambient H2S levels might also be relevant to the implementation of preservation efforts for outdoor marble and limestone historical monuments that have been targeting SO2emissions as an atmospheric acidity source, since the measurements presented here suggest that about 19% of the annual sulfur (SO2+H2S) emissions in Thessaloniki are in the form of H2S.