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Record Details

Record 7 of 2478
Radiolysis of aqueous solutions of acetic acid in the presence of Na-montmorillonite
Author and Affiliation:
Navarro-Gonzalez, R.(Instituto de Ciencias Nucleares, UNAM, Mexico DF)
Negron-Mendoza, A.
Ramos, S.
Ponnamperuma, C.
Abstract: The gamma-irradiation of 0.8 mol dm-3 aqueous, oxygen-free acetic acid solutions was investigated in the presence or absence of Na-montmorillonite. H2, CH4, CO, CO2, and several polycarboxylic acids were formed in all systems. The primary characteristics observed in the latter system were: (1) Higher yield of the decomposition of acetic acid; (2) Lower yield of the formation of polycarboxylic acids; (3) No effect on the formation of methane; (4) Higher yield of the formation of carbon dioxide; and (5) The reduction of Fe3+ in the octahedral sites of Na-montmorillonite. A possible reaction scheme was proposed to account for the observed changes. The results are important in understanding heterogeneous processes in radiation catalysis and might be significant to prebiotic chemistry.
Publication Date: Jan 01, 1990
Document ID:
20040089805
(Acquired Sep 07, 2004)
Subject Category: EXOBIOLOGY
Document Type: Journal Article
Publication Information: Sciences geologiques: Memoire; p. 55-65; (ISSN 0302-2684); Volume 85
Publisher Information: France
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACETIC ACID; ALUMINUM SILICATES; AQUEOUS SOLUTIONS; BENTONITE; CARBOXYLIC ACIDS; GAMMA RAYS; MODELS; MONTMORILLONITE; RADIOLYSIS; ABIOGENESIS; CARBON DIOXIDE; CARBON MONOXIDE; CHEMICAL EVOLUTION; COBALT ISOTOPES; COMPUTERIZED SIMULATION; EXOBIOLOGY; FREE RADICALS; GEOLOGY; HYDROGEN; INFRARED SPECTROSCOPY; METHANE; RADIOACTIVE ISOTOPES; RADIOCHEMISTRY
Other Descriptors: ACETIC ACIDS/ANALYSIS; ALUMINUM SILICATES/ANALYSIS/CHEMISTRY; BENTONITE/ANALYSIS/CHEMISTRY; CARBOXYLIC ACIDS/CHEMICAL SYNTHESIS; GAMMA RAYS; MODELS, CHEMICAL; ACETIC ACID; BIOGENESIS; CARBON DIOXIDE/ANALYSIS; CARBON MONOXIDE/ANALYSIS; CHEMISTRY; COBALT RADIOISOTOPES; COMPUTER SIMULATION; FREE RADICALS; GEOLOGY; HYDROGEN/ANALYSIS; METHANE/ANALYSIS; RADIOCHEMISTRY; SPECTROSCOPY, FOURIER TRANSFORM INFRARED; NASA DISCIPLINE EXOBIOLOGY; NASA DISCIPLINE NUMBER 52-20; NASA PROGRAM EXOBIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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