Selenium mobilization in soils due to volcanic derived acid rain: An example from Mt Etna volcano, Sicily

Floor, Geerke H.; Calabrese, Stefano; Román-Ross, Gabriela; Alessandro, Walter D'; Aiuppa, Alessandro

doi:10.1016/j.chemgeo.2011.08.004

Cited by 37 publications

(12 citation statements)

References 65 publications

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“…However, the mobility of Se may increase in volcanic soils after acid rainfall which may occur due to the interaction between volcanic gases and water vapor in atmosphere [38]. A past study showed that acid rain mobilized Se within volcanic soils which could lead to leaching of Se to aquifers [39]. The presence of other anions such as sulfate in acid rain can increase mobility of Se due to competition for adsorption on exchange sites in the soil since both S and Se are chemical analogs of each other and both are members of group VI on the periodic table with similar chemical properties [40].…”

Section: Volcanic Activitymentioning

confidence: 99%

Selenium in the Soil-Plant Environment: A Review

Saha¹

2017

IJAAS

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Selenium (Se) exhibits a "double-edged" behavior in animal and human nutrition. It is a micronutrient required in low concentrations by animals and humans, but toxic at high concentrations. Selenium deficiency has been associated with cancer and other health problems. Selenium requirements are commonly met through soils and plants such as wheat, rice, vegetables and maize in many countries. Selenium concentration in the soil generally ranges from 0.01-2.0 mg kg-1 but seleniferous soils usually contain more than 5 mg kg-1. Seleniferous soils have been reported in Ireland, China, India and USA. Weathering of parent rocks and atmospheric deposition of volcanic plumes are natural processes increasing Se levels in the environment. Anthropogenic sources of Se include irrigation, fertilizer use, sewage sludge and farmyard manure applications, coal combustion and crude oil processing, mining, smelting and waste incineration. Mobility of Se in the soil-plant system largely depends on its speciation and bioavailability in soil which is controlled by pH and redox potential. Plant uptake of Se varies with plant species and Se bioavailability in the soil. The uptake, translocation, transformation, metabolism, and functions of Se within the plant are further discussed in the paper. The release of Se in soils and subsequent uptake by plants has implications for meeting Se requirements in animals and humans.

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Section: Volcanic Activitymentioning

confidence: 99%

Selenium in the Soil-Plant Environment: A Review

Saha¹

2017

IJAAS

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“…Volcanogenic Se is mobile due to its relatively low vaporization temperature. Oxidation and cooling processes in the atmosphere will transform Se to soluble selenite (SeO3 2− ) and selenate (SeO4 2− ) (Wen and Carignan, 2007) resulting in its high concentrations in the plume and therefore in snowfall and rainfall (Floor et al, 2011). Low amounts of Se have been found in Icelandic hay and herbage (Eiríksdóttir et al 1981, Símonarson et al 1984 resulting in Se deficiency occurring ubiquitously in lambs (Jóhannesson et al, 2007).…”

Section: Enrichment Ratios Of the Volatiles And Trace Metals In The Vmentioning

confidence: 99%

“…Volcanic hazards include degassing, volcanic gas dispersion, acid rain, pollution of surface waters, potential volcanic ash production and glacial outburst floods. These hazards have been previously investigated and used for civil-and environmental protection development in vicinities of the active volcanoes (e.g., Aiuppa, 2009;Aiuppa et al, 2006, Bagnato et al, 2013Björnsson, 2003;Bobrowski et al, 2007;Calabrese et al, 2011;Cuoco et al, 2013;D'Alessandro et al, 2013;Delmelle, 2003;Delmelle et al, 2002;Delmelle et al, 2007;Delmelle et al, 2015;Flaathen and Gislason, 2007;Floor et al,-2011;Galeczka et al, 2014;Gislason et al, 2002;2011;Gudmundsson et al, 1997Gudmundsson et al, , 2008Jones et al, 2011;Kristmannsdóttir et al, 1999;Moune et al, 2006;Menard et al, 2014;Oppenheimer 2003;Roberts et al, 2000;Russell et al, 2006Russell et al, , 2010Snorrason et al, 2002;Stefánsdóttir and Gislason, 2005;Thordarson and Self, 2003;Thordarson and Larsen, 2007;Tómasson, 1996).…”

Section: Introductionmentioning

confidence: 99%

Pollution from the 2014–15 Bárðarbunga eruption monitored by snow cores from the Vatnajökull glacier, Iceland

Galeczka

Eiríksdóttir

Pálsson

et al. 2017

Journal of Volcanology and Geothermal Research

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The chemical composition of Icelandic rain and snow is dominated by marine aerosols, however human and volcanic activity can also affect these compositions. The six month long 2014-15 Bárðarbunga volcanic eruption was the largest in Iceland for more than 200 years and it released into the atmosphere an average of 60 kt/day SO2, 30 kt/day CO2, 500 t/day HCl and 280 t/day HF. To study the effect of this eruption on the winter precipitation, snow cores were collected from the Vatnajökull glacier and the highlands northeast of the glacier. In addition to 29 bulk snow cores from that precipitated from September, 2014 until March, 2015, two cores were sampled in 21 and 44 increments to quantify the spatial and time evolution of the chemical composition of the snow. The pH and chemical compositions of melted snow samples indicate that snow has been affected by the volcanic gases emitted during the Bárðarbunga eruption. The pH of the melted bulk snow cores ranged from 4.41 to 5.64 with an average value of 5.01. This is four times greater H + activity than pure water saturated with the atmospheric CO2. The highest concentrations of volatiles in the snow cores were found close to the eruption site as predicted from CALPUFF SO2 gas dispersion quality model. The anion concentrations (mainly SO4, Cl, and F) were higher and the pH was lower compared to equivalent snow samples collected during 1997−2006 from the unpolluted Icelandic Langjökull glacier. Higher SO4 and Cl concentrations in the snow compared with the unpolluted rainwater of marine origin confirms the addition of a non−seawater SO4 and Cl. The δ 34 S isotopic composition confirms that the sulphur addition is of volcanic aerosol origin. The chemical evolution of the snow with depth reflects changes in the lava effusion and gas emission rates. Those rates were the highest at the early stage of the eruption. Snow that fell during that time, represented by samples from the deepest part of the snow cores, had the lowest pH and highest concentrations of SO4, F, Cl and metals, compared with snow that fell later in the winter. Also the Al concentration, did exceed World Health Organisation drinking water standard of 3.7 µmol/kg in the lower part of the snow core closest to the eruption site. Collected snow represents the precipitation that fell during the eruption period. Nevertheless, only minor environmental impacts are evident in the snow due to its interaction with the volcanic aerosol gases. This minor environmental impact evidenced by the microbial communities identified in the snow that fell during the eruption. These communities were similar to those found in snow from other parts of the Arctic, confirming an insignificant impact of this eruption the snow microecology.

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“…Numerous studies of current conditions indicate the potential role of acidic rainwater in the mobilization of metals (Floor et al, 2011). In this study, we assumed a pH between 3.3 and 4.3, which is typical of rainwater resulting from the mixing between volcanic plumes and atmospheric aerosols (Chudaeva et al, 2006;Calabrese et al, 2011;Floor et al, 2011). These values were measured in the neighborhood of active volcanoes such as Mount Etna.…”

mentioning

confidence: 99%