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Sökning: id:"swepub:oai:DiVA.org:su-90000" > Interaction of fors...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004648naa a2200493 4500
001oai:DiVA.org:su-90000
003SwePub
008130520s2013 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-900002 URI
0247 a https://doi.org/10.1017/S147355041200050X2 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a de Souza, Claudio M. D.4 aut
2451 0a Interaction of forsterite-91 with distilled water and artificial seawater :b a prebiotic chemistry experiment
264 1c 2013
338 a print2 rdacarrier
500 a AuthorCount:12;
520 a In the present work, the interactions between forsterite-91 with distilled water and forsterite-91 with artificial seawater were studied at two pHs (2.0 and 8.0) using different techniques. A large increase in pH was observed for samples incubated at an initially acidic pH (2.0) due to the dissolution of forsterite-91 in distilled water and artificial seawater. Thus, in acidic hydrothermal vents, an increase in the amount of hydrocarbons and magnetite should be expected due to the release of Fe(II). The pH(PZC) decreased and the pH(IEP) increased when forsterite-91 was treated with distilled water and artificial seawater. The ions from the artificial seawater had an effect on zeta potential. Scanning electron microscopy (SEM) images and X-ray diffractograms showed halite in the samples of forsterite-91 mixed with artificial seawater. The presence of halite or adsorption of ions on the surface of forsterite-91 could affect the synthesis of magnetite and hydrocarbons in hydrothermal vents, due to a decrease in the dissolution rates of forsterite-91. The dissolution of forsterite-91 yields low concentrations of Fe(III) and Mn(II) as detected by electron paramagnetic resonance (EPR) spectroscopy. Microanalysis of forsterite-91 showed a higher amount of Mn, with an oxidation that was likely not + II, as Mn in supernatant solutions was only detected by EPR spectroscopy after mixing with artificial seawater at pH 2.0. As Fe(III) and Mn(II) are catalyst constituents of magnetite and manganese oxide, respectively, their presence is important for synthesis in hydrothermal vents. Etch pits were observed only in the forsterite-91 sample mixed with distilled water at pH 8.0. Na, Cl, S, Ca and K were detected in the samples mixed with artificial seawater by SEM-EDS. Si, Mg, Fe and Al were detected in almost all supernatant samples due to forsterite-91 dissolution. Cr was not dissolved in the experiments, thus Cr in the mineral could serve as an effective catalyst for Fischer Tropsch Types (FTT) reactions in hydrothermal vent systems. X-ray diffractograms of the original forsterite-91 also showed peaks arising from zeolites and clinochlore. After the samples were treated with artificial seawater, X-ray diffractograms showed the dissolution of zeolite. Experiments should be performed in the natural environment to verify the potential for zeolites to act as a catalyst in hydrothermal vents.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Multidisciplinär geovetenskap0 (SwePub)105032 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geosciences, Multidisciplinary0 (SwePub)105032 hsv//eng
653 a forsterite-91
653 a olivine
653 a prebiotic chemistry
653 a seawater
7001 a Carneiro, Cristine E. A.4 aut
7001 a Bau, Joao Paulo T.4 aut
7001 a da Costa, Antonio C. S.4 aut
7001 a Ivashita, Flavio F.4 aut
7001 a Paesano, Andrea, Jr.4 aut
7001 a di Mauro, Eduardo4 aut
7001 a de Santana, Henrique4 aut
7001 a Holm, Nils G.u Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)nholm
7001 a Neubeck, Annau Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)anne9113
7001 a Zaia, Cassia T. B. V.4 aut
7001 a Zaia, Dimas A. M.4 aut
7102 a Stockholms universitetb Institutionen för geologiska vetenskaper4 org
7730 t International Journal of Astrobiologyg 12:2, s. 135-143q 12:2<135-143x 1473-5504x 1475-3006
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-90000
8564 8u https://doi.org/10.1017/S147355041200050X

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