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Mineralogical alterations of Zn-Pb flotation wastes of Mississippi Valley-Type ores (southern Poland) and their impact on contamination of rainwater runoff

100%

Bauerek A., Cabala J., Smieja-Krol B.

Polish Journal of Environmental Studies

2009

tom 18

nr 5

Research was carried out on the slopes of a tailings pond built from carbonate wastes, rich in metal flotation wastes of Mississipi Valley-Type Zn-Pb ores in the Silesia-Kraków ore district (southern Poland). These wastes, resulting from Zn-Pb ore processing, may have a detrimental impact on the environment. This study presents results of chemical (ICP, IC, AAS) and mineralogical (XRD, SEM-EDS) characterizations of material from the superficial waste layer, water runoff and relocated suspension. They indicate the occurrence of several secondary mineral phases (Fe oxide, Zn and Pb carbonate, and sulfate-containing metals), resulting from the weathering processes of primary Fe, Zn, and Pb sulfides. Results of XRD and SEM examinations point to the increase of sulfate mineral content in the top layer of wastes compared to the wastes in depth. Rainwater runoff (RWR) on the slopes of tailings is characterised by the prevalence of calcium and sulfate, as well as the presence of metals such as Zn, Fe, Mn, Sr and Cd. Metals and sulfates migration in RWR is one of the ways of contaminants’ spreading around Zn-Pb processing mine tailings.

Main and trace element distribution in slag-leachate-tufa system precipitate

100%

Smieja-Krol B., Bauerek A., Bebek M.

Polish Journal of Environmental Studies

2017

tom 26

nr 1

Detailed chemical and mineralogical analyses were conducted to characterize slag wastes, leachate, and associated tufa precipitates at an iron slag dump near Kraków in southern Poland. The slag contained elevated content of Cr (1,800-6,500 mg/kg), V (500-1,800 mg/kg), and Zn (up to 4,500 mg/kg). The negative environmental impact posed by the wastes can be potentially caused by the formation of leachate with extremely high pH (12.5-12.9), high sulphate (720 mg/l) and K concentrations (420-520 mg/l), and elevated concentrations of fluoride (1.7-2.1 mg/l) and Al (up to 2.7 mg/l). A dominant feature of the leachate was massive precipitation of calcareous tufa forming a cascade of tufa barrier ponds at the base of the slag dump. The tufa preferentially concentrated Pb, Sr, Ba, Rb, sulfur, and phosphorus, while Fe, Zn, Mg, Mn, Cr, and V were depleted relative to the content in the slag material.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

2 Bauerek A.

2 Smieja-Krol B.

1 Bebek M.

1 Cabala J.

1 2017

1 2009

Wyniki wyszukiwania

Mineralogical alterations of Zn-Pb flotation wastes of Mississippi Valley-Type ores (southern Poland) and their impact on contamination of rainwater runoff

Main and trace element distribution in slag-leachate-tufa system precipitate