Fehér Béla (szerk.): Az ásványok vonzásában, Tanulmányok a 60 éves Szakáll Sándor tiszteletére (Miskolc, 2014)

Móricz Ferenc - Mádai Ferenc - Walder Ingar F.: Szulfidos bányászati meddőkben lezajló piritoxidáció időbeni változása

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F. Móricz, F Mádai & I. F. Wälder

Fig. 3. Changes of the pyrite oxidation rate in samples Itos Granza 1 and 2.

3. ábra. A piritoxidáció mértékének változása az Itos Granza 1 és 2 mintákban.

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Fig. 4. Changes of the pyrite oxidation rate in samples Itos jig 1 and 2.

4. ábra. A piritoxidáció mértékének változása az Itos jig I és 2 mintákban.

in Fig 1, where the data of the Bol 2 sample is shown. For the calculation these stable periods were used, such as year 3 from day 21st till day 114th.

In year 2, when only 42 days (6 weeks) were available for running the tests, for the pyrite oxidation rate calculation, the pH values from the last 2-3 weeks were used. Fig. 1 shows that even during this short time the pH became stable enough to do the oxidation rate calculations.

The following three figures show the changes in oxidation rate in the consecutive years. Fig. 2 introduces the three samples called Bol 1, 2 and 3, Fig. 3 shows the two Itos Granza waste rock samples while Fig. 4 presents the two Itos jig tailing samples.

To investigate the mineral alteration and pyrite oxidation, scanning electron microscope analyses were completed on samples before the column test, at Department of Mineralogy and Petrology, University of Miskolc. The SEM analysis also proved that the