Photochemistry of concentrated sulfuric acid in the presence of SO2 and Fe(II), and implications for the cloud chemistry of Venus

Rowland, G. A.; Eldik, Rudi van; Phillips, Leon F.

doi:10.1016/s1010-6030(02)00303-9

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…The UV–visible spectrum of sulfuric acid after irradiation is similar to the one obtained after bubbling SO 2 in 18 M H 2 SO 4 . These spectra are also similar to the one of S(IV) in 98% sulfuric acid . Consequently, SO 2 is generated during α-irradiation of 18 M H 2 SO 4 .…”

Section: Resultssupporting

confidence: 67%

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Behavior of Heptavalent Technetium in Sulfuric Acid under α-Irradiation: Structural Determination of Technetium Sulfate Complexes by X-ray Absorption Spectroscopy and First Principles Calculations

et al. 2014

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The effect of α-radiolysis on the behavior of heptavalent technetium has been investigated in 13 and 18 M H2SO4. Irradiation experiments were performed using α-particles ((4)He(2+), E = 68 MeV) generated by the ARRONAX cyclotron. UV-visible and X-ray absorption fine structure spectroscopic studies indicate that Tc(VII) is reduced to Tc(V) under α-irradiation. Extended X-ray absorption fine structure (EXAFS) spectroscopy measurements are consistent with the presence of mononuclear technetium sulfate complexes. Experimental results and density functional calculations show the formation of [TcO(HSO4)3(H2O)(OH)](-) and/or [TcO(HSO4)3(H2O)2] and [Tc(HSO4)3(SO4)(H2O)] and/or [Tc(HSO4)3(SO4)(OH)](-) for 13 and 18 M H2SO4, respectively.

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Section: Resultssupporting

confidence: 67%

“…These spectra are also similar to the one of S(IV) in 98% sulfuric acid. 25 Consequently, SO 2 is generated during α-irradiation of 18 M H 2 SO 4 . The radiolytic yield of soluble SO 2 produced (i.e., G(SO 2 )) under α-irradiation in H 2 SO 4 (95%) was determined at (1.84 ± 0.18) × 10 −7 mol•J −1 .…”

Section: Resultsmentioning

confidence: 99%

Behavior of Heptavalent Technetium in Sulfuric Acid under α-Irradiation: Structural Determination of Technetium Sulfate Complexes by X-ray Absorption Spectroscopy and First Principles Calculations

et al. 2014

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“…Although photolysis of the Fe-SO 4 + complex may also produce Fe(II), as shown in reaction (13) [33,34], the rate of Fe-SO 4 + photolysis may be slower than that of Fe-Cl (reaction (10)). Therefore, the overall Cr(VI) photo-reduction decreased with the addition of SO 4 …”

Section: Effect Of Other Anions On Cr(vi) Photo-reduction With Fe-cl mentioning

confidence: 99%

Influence of inorganic anion on Cr(VI) photo-reduction in the presence of ferric ion

Tzou¹,

Hsu²,

Chen³

et al. 2008

Journal of Hazardous Materials

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“…Gas chromatography analysis on board VEGA 1 and 2 probes has, in addition, inferred elemental sulfur in the clouds ( 28 ). These observations have motivated studies dedicated to exploring how iron and sulfur may interact in a Venus analog environment ( 29 , 30 ), and their products have been proposed as candidate absorbers in the clouds of Venus ( 31 ). The exact nature and speciation of these elements and compounds, however, remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Iron-sulfur chemistry can explain the ultraviolet absorber in the clouds of Venus

Jiang,

Rimmer,

Lozano

et al. 2024

Sci. Adv.

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The clouds of Venus are believed to be composed of sulfuric acid (H 2 SO 4 ) and minor constituents including iron-bearing compounds, and their respective concentrations vary with height in the thick Venusian atmosphere. This study experimentally investigates possible iron-bearing mineral phases that are stable under the unique conditions within Venusian clouds. Our results demonstrate that ferric iron can react with sulfuric acid to form two mineral phases: rhomboclase [(H 5 O 2 )Fe(SO 4 ) 2 ·3H 2 O] and acid ferric sulfate [(H 3 O)Fe(SO 4 ) 2 ]. A combination of these two mineral phases and dissolved Fe 3+ in varying concentrations of sulfuric acid are shown to be good candidates for explaining the 200- to 300-nm and 300- to 500-nm features of the reported unknown UV absorber. We, therefore, hypothesize a rich and largely unexplored heterogeneous chemistry in the cloud droplets of Venus that has a large effect on the optical properties of the clouds and the behavior of trace gas species throughout Venus’s atmosphere.

show abstract

Photochemistry of concentrated sulfuric acid in the presence of SO2 and Fe(II), and implications for the cloud chemistry of Venus

Cited by 5 publications

References 13 publications

Behavior of Heptavalent Technetium in Sulfuric Acid under α-Irradiation: Structural Determination of Technetium Sulfate Complexes by X-ray Absorption Spectroscopy and First Principles Calculations

Behavior of Heptavalent Technetium in Sulfuric Acid under α-Irradiation: Structural Determination of Technetium Sulfate Complexes by X-ray Absorption Spectroscopy and First Principles Calculations

Influence of inorganic anion on Cr(VI) photo-reduction in the presence of ferric ion

Iron-sulfur chemistry can explain the ultraviolet absorber in the clouds of Venus

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