An Environmental Impact of Pyritic Bauxite from the Dajti Mine, Albania

0145097 - GLU-S 20004042 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Novák, Jiří Karel - Minařík, Luděk - Peza, Luftulla Hasan - Melka, Karel
An Environmental Impact of Pyritic Bauxite from the Dajti Mine, Albania.
80-210-2448-8. In: 15th Conference on Clay Mineralogy and Petrology. Proceedings. Brno: Masaryk University, 2000 - (Sulovský, P.), s. 109-116. Geology.
[Conference on Clay Mineralogy and Petrology /15./. Brno (CZ), 06.09.1998-10.09.1998]
Výzkumný záměr: CEZ:AV0Z3013912
Klíčová slova: acid leaching * acidification * karst bauxite
Kód oboru RIV: DB - Geologie a mineralogie

The accelerated chemical weathering of bauxite due to acid atmospheric deposition and breakdown of pyrite was simulated using short-termed laboratory acid leaching at 20 o C. Pyrite-bearing gibbsite-boehmitic bauxite giving rise to a number of questions concerning ecology was tested along with oxic boehmitic bauxite from the Dajti mine and that from Mali Korites (Mali Thate Mts., SE Albania). The leachte of pyrite-bearing and sulphate-producing bauxite is enriched in the following risk elements: Cd, Be, Zn, Ni, Co, and much less Cr, Cu, As, and Pb. Toxic soluble hydroxy-alumina ions may be also released into the aquatic environment, because of high concentration in output leachate (563 mg/l). In contrast, the leachates of oxic boehmitic bauxites commonly contain much lower concentrations of toxic elements with exception of Cu (Dajti mine) and Be (new occurence of Mali Korites).
Trvalý link: http://hdl.handle.net/11104/0042711