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Environment Protection Engineering
Zinc and lead ore flotation tailings deposited in the Olkusz region show a neutral reaction. They are composed of dolomite-type minerals (alkaline), mostly Ca,Mg(CO 3) 2 and Ca,Mg,Fe(CO 3) 2 (70%), and other minerals including sulphides (acid), mainly pyrite and marcasite (FeS 2 ; up to 20%). Sulphur and iron concentration in tailings reaches the levels of 7-14% and of 8-16%, respectively. The microenvironments rich in sulphide minerals present in waste materials which indicate almost neutralfatcat:tu6r4j462rcm7i53cndy7mf27i