Lietuvos mokslų akademijos Leidybos skyrius
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Geologija / Geology

ISSN 1392-110X
ISSN 2029-056X (online)

2006 m. Nr. 3

Formation of iron compounds in the Quaternary groundwater of Lithuania
Jonas DILIŪNAS, Arūnas JUREVIČIUS, Algirdas ZUZEVIČIUS

The article focuses on the formation of iron concentrations in groundwater of Lithuanian Quaternary sediments. The vertical and horizontal distribution of iron concentrations, zonality, forms of compounds and conditions of equilibrium and mineral saturation were determined employing the WATEQ4F computer program. The main factor determining the formation and stability of iron compounds in groundwater is the aquifer–atmosphere interaction, i.e. the degree of confinement of a water-bearing system. There are three types of hydrogeological systems distinguished: open, semi-open and closed. Two factors – the dissolution process and the thermodynamic environment (pH, Eh) of the aquifer – predetermine iron concentrations. Fe2+ and Fe(OH)3 are the main migration forms of iron. The investigation was aimed at substantiating the most effective methods of iron elimination from water intended for household consumption.

Keywords: aquifer, computer program WATEQ4F, groundwater, Lithuania, iron, migration forms, saturation

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