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Authors: D'Alessandro, W.* 
Brusca, L.* 
Kyriakopoulos, K.* 
Michas, G.* 
Papadakis, G.* 
Title: Hydrogen sulphide as a natural air contaminant in volcanic/geothermal areas: the case of Sousaki, Corinthia (Greece)
Issue Date: 2009
Series/Report no.: 8/57(2009)
DOI: 10.1007/s00254-008-1453-3
Keywords: Hydrogen sulphide
Environmental impact of volcanic activity
Gas hazard
Passive samplers
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.03. Pollution 
01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects 
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 
04. Solid Earth::04.08. Volcanology::04.08.01. Gases 
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 
Abstract: Volcanic and geothermal areas are one of the major natural sources of H2S to the atmosphere. Its environmental impact is often the main cause of the opposition to the development of geothermal energy exploitation programs. In this paper we analyze the air concentrations and dispersion pattern of naturally emitted H2S at the geothermal area of Sousaki (Corinthia, Greece). Measurements, made with a network of passive samplers, evidence a rapid decrease of concentration values away from the emission points. The fact that the decrease is more pronounced in the summer with respect to the winter indicates that it is not only due to a dilution effect, but also to redox reactions favoured by higher temperatures and intense sunlight typical of the summer period.
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