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Bioremediation of Acid Mine Drainage in an Uranium Deposit
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Sustainable Approach for the Immobilization of Metals in the Saturated Zone: In Situ Bioprecipitation
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Development of a Novel Biological System for Removing Manganese from Contaminated Waters
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Development of a Novel Biological System for Removing Manganese from Contaminated Waters

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Abstract:

Soluble manganese (Mn(II)) can cause nuisance and occasionally toxicity problems, both in surface and ground waters and in domestic water supplies. Many mine drainage waters contain highly elevated concentrations (often >100 mg l-1). Current systems for remediating mine waters, although effective for other metals, are often inefficient at removing manganese. This paper describes the development of self-sustaining, low-cost bioreactors that can be used in situ for passive removal of manganese from mine waters and other contaminated water courses of pH >4. A prototype bioreactor, set-up using Mn(IV)-coated pebbles from a fresh-water stream, was tested over one year and shown to be effective in removing Mn(II) from 10 to <0.25 mg l-1. Two species of fungi and one bacterial species were isolated from this system as Mn(II)-oxidizers. The fungi were identified as belonging to the order Pleosporales (Ascomycetes), and one was related (98 % 18S rRNA gene sequence identity) to a known Mn(II)-oxidising fungus. The bacterial isolate was closely related to the α-proteobacterium, Bosea thiooxidans. T-RFLP analysis showed that one or both of the fungal isolates were the dominant eukaryotes in the bioreactor community.

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Periodical:

Advanced Materials Research (Volumes 20-21)

Pages:

267-270

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.20-21.267

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Online since:

July 2007

Authors:

Richard Mariner, D. Barrie Johnson, Kevin B. Hallberg

Keywords:

Biofilm, Bioreactor, Bioremediation, Manganese, Mine Water

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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