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Analyzing the role of interfacial water on sulfate formation on present Mars |
Tartalom: | http://real.mtak.hu/90457/ |
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Archívum: | REAL |
Gyűjtemény: |
Status = Published
Subject = Q Science / természettudomány: QD Chemistry / kémia: QD01 Analytical chemistry / analitikai kémia Subject = Q Science / természettudomány: QD Chemistry / kémia Subject = Q Science / természettudomány: QE Geology / földtudományok: QE02 Geochemistry / geokémia Subject = Q Science / természettudomány: QB Astronomy, Astrophysics / csillagászat, asztrofizika Subject = Q Science / természettudomány: QD Chemistry / kémia: QD06 Mineralogy / ásványtan Subject = Q Science / természettudomány: QE Geology / földtudományok Type = Article |
Cím: |
Analyzing the role of interfacial water on sulfate formation on present Mars
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Létrehozó: |
Góbi, Sándor
Kereszturi, Ákos
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Kiadó: |
Elsevier
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Dátum: |
2019
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Téma: |
QB Astronomy, Astrophysics / csillagászat, asztrofizika
QD Chemistry / kémia
QD01 Analytical chemistry / analitikai kémia
QD06 Mineralogy / ásványtan
QE Geology / földtudományok
QE02 Geochemistry / geokémia
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Tartalmi leírás: |
This work investigates a realistic scenario for sulfate formation on Mars that may have occurred under conditions
representative to the whole Amazonian period. The process, according to reaction kinetics, works without the necessity of elevated temperature and is due to volcanic eruptions. Theoretical modeling utilizing a heterogeneous pathway leading to sulfates in the presence of microscopic subzero-temperature liquid H2O layer is presented for the first time. The process takes place via the following steps: 1. explosive volcanic eruption with gas, vapor and ash particle release; 2. adsorption of volcanic SO2 and H2O on grains in the volcanic cloud, and formation of interfacial H2O layer between the ice–grain boundary; 3. chemical reactions in the microscopic liquid H2O film forming HSO3
–(aq); 4. oxidation to HSO4 –(aq); 5. acid-sulfate reaction yielding SO4 –-bearing minerals. Steps 1 and 2 happen in the atmosphere, steps 3 and 4 may occur both in the atmosphere and after deposition on the surface, while step 5 takes place on the surface. According to the findings the heterogeneous pathway is an important one, therefore future models should consider them besides homogeneous gas-phase
reactions. Furthermore, microscopic liquid H2O could produce specific zonal distribution of sulfate content on
the surface.
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Nyelv: |
magyar
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Típus: |
Article
PeerReviewed
info:eu-repo/semantics/article
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Formátum: |
text
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Azonosító: |
Góbi, Sándor and Kereszturi, Ákos (2019) Analyzing the role of interfacial water on sulfate formation on present Mars. Icarus, 322. pp. 135-143. ISSN 0019-1035
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