Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9413

Authors: Calabrese, S.*
Scaglione, S.*
Milazzo, S.*
D'Alessandro, W.*
Bobrowski, N.*
Giuffrida, G. B.*
Tedesco, D.*
Parello, F.*
Yalire, M.*
Title: Passive degassing at Nyiragongo (D.R. Congo) and Etna (Italy) volcanoes
Title of journal: Annals of Geophysics
Series/Report no.: Fast Track 2/57(2014)
Issue Date: 2014
DOI: 10.4401/ag-6637
URL: http://www.annalsofgeophysics.eu/index.php/annals/article/view/6637
Keywords: volcanic emissions
filter-packs
trace elements
biomonitoring
bulk deposition
Abstract: Volcanoes are well known as an impressive large natural source of trace elements into the troposphere. Etna (Italy) and Nyiragongo (D.R. Congo) are two stratovolcanoes located in different geological settings, both characterized by persistent passive degassing from their summit craters. Here, we present some results on trace element composition in volcanic plume emissions, atmospheric bulk deposition (rainwater) and their uptake by the surrounding vegetation, with the aim to compare and identify differences and similarities between these two volcanoes. Volcanic emissions were sampled by using active filter-packs for acid gases (sulfur and halogens) and specific teflon filters for particulates (major and trace elements). The environmental impact of the volcanogenic deposition in the area surrounding of the crater rims was investigated by using different sampling techniques: bulk rain collectors’ gauges were used to collect atmospheric bulk deposition, and biomonitoring was carried out to collect gases and particulates by using endemic plant species. The estimates of the trace element fluxes confirm that Etna and Nyiragongo are large sources of metals into the atmosphere, especially considering their persistent state of passive degassing. The large amount of emitted trace elements is clearly reflected on the chemical composition of rainwater collected at the summit areas both for Etna and Nyiragongo. Moreover, the biomonitoring results highlight that bioaccumulation of trace elements is extremely high in the proximity of the crater rim and decreases with the distance from the active craters.
Appears in Collections:01.01.03. Pollution
01.01.07. Volcanic effects
Papers Published / Papers in press

Files in This Item:

File Description SizeFormatVisibility
AnnGeoph.Calabrese&al.pdfmain article2.15 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Share this record
Del.icio.us

Citeulike

Connotea

Facebook

Stumble it!

reddit


 

Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA