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- Title
The properties of reservoir water in post-mining excavations of Cambrian and Devonian quartzite sandstones (Holy Cross Mountains).
- Authors
Molenda, Tadeusz; Ciupa, Tadeusz; Suligowski, Roman
- Abstract
In the Holy Cross Mountains (southern Poland), there are numerous disused quarries. Some of these are filled with water, and some, despite their nearby location, have extremely diverse physicochemical and chemical properties of their waters. One such object is the Wiśniówka Mała reservoir. Its waters contain large amounts of sulfates (> 700 mg/L) and iron (24 mg/L), which are weathering products of rocks containing metal sulfides (mainly pyrite) in the direct drainage zone. As a consequence, there is an increase in the electrolytic conductivity of the water supplying the reservoir, resulting in very low pH values (< 4). This article presents the detailed limnological characteristics of this reservoir and explains the process that led to its water acidification. A control reservoir, Barcza, was also selected for the tests. Although it is also a post-mining excavation, it has a neutral pH and a low concentration of sulfates and iron. The examined reservoirs differ in the hydrochemical type of waters. The Wiśniówka Mała reservoir represents a sulfate–calcium double-ion type (SO42−–Ca2+) and the Barcza reservoir, a bicarbonate–calcium type (HCO3−–Ca2+). The concentrations of the main ions occurring here are shaped by the lithological features of the surrounding rocks (respectively: Upper Cambrian quartzite sandstones with pyrite mineralization zones, Lower Devonian sandstones cut by mudstones and claystones with tuffite inserts).
- Subjects
SWIETOKRZYSKIE Mountains (Poland); POLAND; RESERVOIRS; WATER acidification; WATER supply; SANDSTONE; ORE deposits; OIL field flooding
- Publication
Environmental Earth Sciences, 2020, Vol 79, Issue 12, p1
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-020-09054-8