Fumarolic alteration products at Sousaki (Greece): occurrence and environmental impact

Fumarolic alteration crusts and efflorescences have been sampled at the Sousaki solfataric field. Samples have been analysed for mineralogical (XRD) and chemical composition (HNO3 digestion and leaching with distilled water). Results show that mineralogical and chemical compositions (major, minor and trace metals) are controlled by microenvironmental conditions.

The sample collected in the anoxic part of a cave is composed almost exclusively by native sulfur. The samples collected in the oxidizing part of the cave and outside in relatively sheltered position are mainly composed by very soluble sulfates. Chemical composition evidence strong enrichments in Al, Ca, Cr, Fe, Mg and Ni which are present in highly soluble form and derive from the fumarolic alteration of the outcropping rocks (Marls and peridotites). One sample collected outside the cave, well exposed to atmospheric agents, is composed almost exclusively of gypsum and the chemical composition reveals, with respect to the previous samples, a relative enrichment of elements (Ba, Ca, K, Pb and Sr) forming less soluble sulfates. The presence of toxic metals like Al, Cr and Ni in high concentrations and highly soluble form evidences the potential impact of the fumarolic activity on the local environment.



Copyright: © Aristotle University of Thessaloniki
Quelle: 2nd International Conference 2009 (Juni 2009)
Seiten: 6
Preis inkl. MwSt.: € 5,00
Autor: W. D’Alessandro
Silvio Rotolo
Konstantinos Kiriakopoulos
Francesco Sergio Bellomo
Dr Lorenzo Brusca

Artikel weiterleiten In den Warenkorb legen Artikel kommentieren


Diese Fachartikel könnten Sie auch interessieren:

Content of macroelements in Avena sativa L., Brassica napus var. oleifera and Lupinus luteus L. after contamination of soil by copper and zinc
© Aristotle University of Thessaloniki (6/2009)
The aim of the study was to determine the effect of copper and zinc contamination on macroelements content in plants. Research was located on two alkaline soils which in natural conditions were formed with loamy sand and sandy loam. The soil was contaminated with copper (Cu) and zinc (Zn) at the following rates: 0, 150 and 450 mg/kg of soil.

Lead fractionation in soil as affected by organic and inorganic amendments
© Aristotle University of Thessaloniki (6/2009)
The Pb fractionation in the sewage sludge and cow manure before and after removal of organic carbon, reducible Fe, iron oxide and Pb(NO3)2 salt was determined by a sequential extraction method. Despite cow manure and sewage sludge had high level of organic carbon (54 and 31%, respectively), most of the Pb in these amendments was found in the inorganic (oxide) fraction.

The influence of soil to solution ratio on cadmium removal from soils using anionic surfactants
© Aristotle University of Thessaloniki (6/2009)
The effectiveness of cadmium removal from soils by two anionic surfactants at different soil/solution ratio (m/V) was investigated. At critical micelle concentration (CMC) Rosulfan L reduced surface tension of water more sufficiently than ABS Na/S. In soil/surfactant systems CMC values clearly increased in comparison with fresh solutions, indicating surfactants sorption.

The influence of soil – plant factors on the uptake of Cs by two plant species
© Aristotle University of Thessaloniki (6/2009)
To investigate Cs uptake by two different plant species grown on soils with contrasting physicochemical properties, a greenhouse pot experiment was conducted. Soil in each pot contaminated with 40 ug g-1 of Cs in the form of CsCl by spraying the solution in layers. After an equilibration period of two months, the soil of each pot appropriately sowed with seeds of Lolium perenne and Trifolium pratense plants.

Geogen erhöhte Spurenelementgehalte in Böden Deutschlands - Ausmaß und Bedeutung für den Vollzug der BBodSchV –
© Bayerisches Landesamt für Umwelt (5/2006)
Auf der Basis einer straten- und elementdifferenzierten Auswertung von repräsentativen Stichproben zu Hintergrundgehalten in Böden werden für ca. 6.5 % der Fläche Deutschlands geogen erhöhte Gehalte im Sinne einer Überschreitung von Vorsorgewerten der BBodSchV nachgewiesen. Eine schädliche Bodenveränderung durch erhebliche Elementfreisetzung ist v.a. auf stark versauerten Böden unter Wald zu erwarten.

Name:

Passwort:

 Angemeldet bleiben

Passwort vergessen?

Abfallausstellung
Nur wer die Geschichte kennt,
siegt im ewigen Kampf
gegen den Müll