Geochemical study of iodine in volcanic gases. II. Behavior of iodine in volcanic gases.

Honda, Fumihiro

doi:10.2343/geochemj.3.201

Cited by 12 publications

(10 citation statements)

References 12 publications

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“…Other studies have shown that while the Cl vs. Br ratio for volcanic condensates is in agreement with the seawater ratio of around 650 (Gerlach, 2004;Aiuppa et al, 2005), the ratio of Cl vs. I is about 2 orders of magnitude lower in volcanic plumes than in seawater (Honda et al, 1966;Honda, 1970;Snyder and Fehn, 2002;Aiuppa et al, 2005). Consequently, an enhancement of io-dine species takes place in the processes which determine the release of halogens from volcanic activity.…”

Section: Discussionsupporting

confidence: 54%

Space-based observation of volcanic iodine monoxide

et al. 2017

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Abstract. Volcanic eruptions inject substantial amounts of halogens into the atmosphere. Chlorine and bromine oxides have frequently been observed in volcanic plumes from different instrumental platforms such as from ground, aircraft and satellites. The present study is the first observational evidence that iodine oxides are also emitted into the atmosphere during volcanic eruptions. Large column amounts of iodine monoxide, IO, are observed in satellite measurements following the major eruption of the Kasatochi volcano, Alaska, in 2008. The IO signal is detected in measurements made both by SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric CHartographY) on ENVISAT (Environmental Satellite) and GOME-2 (Global Ozone Monitoring Experiment-2) on MetOp-A (Meteorological Operational Satellite A). Following the eruption on 7 August 2008, strongly elevated levels of IO slant columns of more than 4 × 1013 molec cm−2 are retrieved along the volcanic plume trajectories for several days. The retrieved IO columns from the different instruments are consistent, and the spatial distribution of the IO plume is similar to that of bromine monoxide, BrO. Details in the spatial distribution, however, differ between IO, BrO and sulfur dioxide, SO2. The column amounts of IO are approximately 1 order of magnitude smaller than those of BrO. Using the GOME-2A observations, the total mass of IO in the volcanic plume injected into the atmosphere from the eruption of Kasatochi on 7 August 2008, is determined to be on the order of 10 Mg.

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Section: Discussionsupporting

confidence: 54%

Space-based observation of volcanic iodine monoxide

et al. 2017

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“…Triangular plot showing the molar covariance of Cl, Br, and I in the volcanic gases from Masaya (closed diamonds), Telica (open squares), and the Northeast (crosses) and Voragine (open circles) craters of Mount Etna, Italy [ Aiuppa et al , 2005a]. Compositions are also shown for mean ocean water (Cl/Br = 651 and Cl/I = 1190000; [ Nozaki , 1997]), meteoric water measured in rivers and lakes in Central America [ Snyder and Fehn , 2002], Central American fumarolic condensates (153–281°C, [ Snyder and Fehn , 2002]); Japanese fumarolic condensates [ Honda , 1970]; continental crust [ Newsom , 1995], MORB [ Johnson et al , 2000], CI chondrite [ Johnson et al , 2000], pore water samples [ Egeberg and Dickens , 1999], and typical marine organisms, marine shales and pelagic sediments, and the input and output to the Cascadia arc [ Hurwitz et al , 2005]. We also plot the trends for gas compositions produced by open system Rayleigh degassing of magma with crustal or seawater halogen starting compositions, based on the partition coefficients presented by Bureau et al [2000] and modeling the system as Rayleigh type open system degassing.…”

Section: Resultsmentioning

confidence: 99%

Mercury and halogen emissions from Masaya and Telica volcanoes, Nicaragua

et al. 2008

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[1] We report measurements of Hg, SO 2 , and halogens (HCl, HBr, HI) in volcanic gases from Masaya volcano, Nicaragua, and gaseous SO 2 and halogens from Telica volcano, Nicaragua. Mercury measurements were made with a Lumex 915+ portable mercury vapor analyzer and gold traps, while halogens, CO 2 and S species were monitored with a portable multi gas sensor and filter packs. Lumex Hg concentrations in the plume were consistently above background and ranged up to 350 ng m À3. Hg/SO 2 mass ratios measured with the real-time instruments ranged from 1.1 Â 10 À7 to 3.5 Â 10 À5 (mean 2 Â 10 À5

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“…Estimates of the global volcanic iodine flux range from 0.11 kt yr 21 [Aiuppa et al, 2005a] to about 0.2-7.7 kt yr 21 [Snyder and Fehn, 2002] or roughly 1% of the bromine flux. Probably I is dominantly released as hydrogen iodide (HI) [e.g., Honda, 1970] and could eventually form the reactive halogen species iodine oxide (IO). However, iodine oxides have not been detected yet.…”

Section: Introductionmentioning

confidence: 99%

“…Volcanic iodine in the gas phase of a plume was only investigated a few times in the past after the absorption of iodine compounds on a filter [e.g., Aiuppa et al, 2005a;Witt et al, 2008] and detection by ICP-MS. Most studies focus on the detection of iodine in fumaroles [Honda et al, 1966, Honda 1970Tedesco and Toutain, 1991] or in volcanic fluids, where the origin of iodine is localized in the deep parts of the subduction zone and the overlying crust [Snyder and Fehn, 2002].…”

Section: Introductionmentioning

confidence: 99%

Active alkaline traps to determine acidic‐gas ratios in volcanic plumes: Sampling techniques and analytical methods

Wittmer

Bobrowski

Liotta

et al. 2014

Geochem Geophys Geosyst

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In situ measurements have been the basis for monitoring volcanic gas emissions for many years and-being complemented by remote sensing techniques-still play an important role to date. Concerning in situ techniques for sampling a dilute plume, an increase in accuracy and a reduction of detection limits are still necessary for most gases (e.g., CO 2 , SO 2 , HCl, HF, HBr, HI). In this work, the Raschig-Tube technique (RT) is modified and utilized for application on volcanic plumes. The theoretical and experimental absorption properties of the RT and the Drechsel bottle (DB) setups are characterized and both are applied simultaneously to the well-established Filter packs technique (FP) in the field (on Stromboli Island and Mount Etna). The comparison points out that FPs are the most practical to apply but the results are errorprone compared to RT and DB, whereas the RT results in up to 13 times higher analyte concentrations than the DB in the same sampling time. An optimization of the analytical procedure, including sample pretreatment and analysis by titration, Ion Chromatography, and Inductively Coupled Plasma Mass Spectrometry, led to a comprehensive data set covering a wide range of compounds. In particular, less abundant species were quantified more accurately and iodine was detected for the first time in Stromboli's plume. Simultaneously applying Multiaxis Differential Optical Absorption Spectroscopy (MAX-DOAS) the chemical transformation of emitted bromide into bromine monoxide (BrO) from Stromboli and Etna was determined to 3-6% and 7%, respectively, within less than 5 min after the gas release from the active vents.

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Geochemical study of iodine in volcanic gases. II. Behavior of iodine in volcanic gases.

Abstract: Geochemical study Behavior of of iodine iodine in in volcanic gases. II. volcanic gases.

Cited by 12 publications

References 12 publications

Space-based observation of volcanic iodine monoxide

Space-based observation of volcanic iodine monoxide

Mercury and halogen emissions from Masaya and Telica volcanoes, Nicaragua

Active alkaline traps to determine acidic‐gas ratios in volcanic plumes: Sampling techniques and analytical methods

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