Selective recovery of Zn2+ from waste slag from a metal-processing plant by the microscopic fungus Verticillium marquandii |
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Authors: | Miros?awa S?aba Jerzy D?ugoński |
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Institution: | (1) Department of Industrial Microbiology, University of ód, Banacha 12/16, PL-90-237 ód, Poland |
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Abstract: | The successful use of hay extract medium for growth of Verticillium marquandii in the presence of toxic black slag, resulted in selective and efficient Zn2+ recovery. An alkaline black waste slag originating from short rotary furnace, contained Zn2+ and Pb2+ (20% and 3.5%, respectively) in a form of compounds only slightly soluble in water. After 90 h of the culturing in bioreactor on hay extract medium with starch (50 g l–1) and black waste (5 g l–1) supplements, 80% of zinc and 0.5% of lead were bound by the mycelium. The pH value of the culture medium played a crucial role for limitation of the waste inhibitory effect on mycelium growth and for heavy metal recovery by the fungus. |
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Keywords: | black waste slag Verticillium marquandii zinc recovery zinc uptake |
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