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2 2009

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Ograniczenie wpływu bioługowanych odpadów przemysłu metalurgicznego na środowisko

Pałdyna J., Krasnodębska-Ostręga B., Golimowski J.

Przegląd Geologiczny

2009

Vol. 57, nr 12

1090-1095

Various bioleaching processes are applied to recover valuable elements from low-grade ores and metallurgical waste. The activity of microorganisms leads to solubilization of metals from solid substrates and, in this way, makes possible recovery of elements from solutions. The study of wastes from the nickel-chromium steelworks in Szklary showed that a mobile fraction of elements remaining in residues from bioleaching process was substantially larger than in raw waste material. The highest mobility was displayed by metals in wastes leached by heterotrophic bacteria prior to autotrophic ones. In that case the mobile fraction makes up 60–80% of the total concentration of Ni, Cr, Cu and Zn. Storage of bioleached mine tailings increases risk of permeation of hazardous matter to aquifers. When this is the case, a careful flushing and use of metal-binding materials such as bentonite, zeolites, cement, and commercial preparations containing these ingredients are recommended. The obtained results showed that concrete, which is the cheapest of the applied materials, bound almost entirely the mobile fractions of Ni, Cr, Co, Pb, Cu and Zn.

Fractionation of selected elements in water samples from the mining and smelting area

Krasnodębska-Ostręga B., Jedynak Ł., Galus M., Pałdyna J., Kowalska J., Golimowski J.

Chemia Analityczna

2009

Vol. 54, No. 5

1009-1019

The main objective of this work was to show the necessity of defining and separation of a dust fraction — physically defined as a fraction of particles larger than 100 |im in size — before the assessment of contamination of water reservoirs. Water samples from four reservoirs located in the vicinity of the Mining and Smelting Works in Bukowno - the main source of dust pollution in this region-were investigated. Distribution of 10 selected elements (As, Cd, Co, Cr, Cu, Mn, Ni, Pb, Tl, Zn) among three physically defined fractions was assessed. The following fractions were separated: 1) suspended paniculate matter (particles between 0.45 and 100 um), 2) "dust" traction (particles > 100 &mum), and 3) dissolved fraction (< 0.45 μ m). The results obtained for the samples collected during two seasons dry and rainy were compared.

Celem pracy było wykazanie potrzeby włączenia do procedury frakcjonowania pierwiastków w wodach etapu wydzielenia frakcji cząstek o rozmiarze > 100 μm. Badaniami objęto zbiorniki wodne zlokalizowane w pobliżu Kombinatu Górniczo-Hutniczego w Bukownie, gdzie zapylenie terenu jest istotnym źródłemjego zanieczyszczenia. Oznaczano zawartości l0wybranych pierwiastków (As, Cd, Co, Cr, Cu, Mn, Ni, Pb, Tl, Zn) we frakcji zawieszonej (od 0,45 um do 100 &mu), frakcji związanej z zapyleniem (> 100 μm) i frakcji rozpuszczonej (< 0,45 μ m). Przedyskutowano wpływ ilości opadów atmosferycznych na rozmieszczenie badanych pierwiastków w poszczególnych frakcjach.