2024-03-29T22:45:24Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1309382018-07-27T08:18:47Zcom_10261_82com_10261_8col_10261_335
2016-04-11T09:26:19Z
urn:hdl:10261/130938
Volcanic ash leaching as a means of tracing the environmental impact of the 2011 Grímsvötn eruption, Iceland
Cabré, J.
Aulinas, M.
Rejas, Marta
Fernandez-Turiel, J. L.
Fernandez-Turiel, J. L.
Ministerio de Economía y Competitividad (España)
Volcanic ash
Water leaching
Geochemical flux
Grímsvötn
The Grímsvötn volcanic eruption, from 21 to 28 May, 2011, was the largest eruption of the Grímsvötn Volcanic System since 1873, with a Volcanic Explosivity Index (VEI) of magnitude 4. The main geochemical features of the potential environmental impact of the volcanic ash-water interaction were determined using two different leaching methods as proxies (batch and vertical flow-through column experiments). Ash consists of glass with minor amounts of plagioclase, clinopyroxene, diopside, olivine and iron sulphide; this latter mineral phase is very rare in juvenile ash. Ash grain morphology and size reflect the intense interaction of magma and water during eruption. Batch and column leaching tests in deionised water indicate that Na, K, Ca, Mg, Si, Cl, S and F had the highest potential geochemical fluxes to the environment. Release of various elements from volcanic ash took place immediately through dissolution of soluble salts from the ash surface. Element solubilities of Grímsvötn ash regarding bulk ash composition were <1 %. Combining the element solubilities and the total estimated mass of tephra (7.29 × 1014 g), the total inputs of environmentally important elements were estimated to be 8.91 × 109 g Ca, 7.02 × 109 g S, 1.10 × 109 g Cl, 9.91 × 108 g Mg, 9.91 × 108 g Fe and 1.45 × 108 g P The potential environmental problems were mainly associated with the release of F (5.19 × 109 g)
2016-04-11T09:26:19Z
2016-04-11T09:26:19Z
2016-04
artículo
Environmental Science and Pollution Research, 23(7): 1-16 (2016)
0944-1344
http://hdl.handle.net/10261/130938
10.1007/s11356-016-6559-7
1614-7499
http://dx.doi.org/10.13039/501100003329
eng
Postprint
http://dx.doi.org/10.1007/s11356-016-6559-7
Sí
openAccess
Springer