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Peatlands as Filters for Polluted Mine Water?—A Case Study from an Uranium-Contaminated Karst System in South Africa—Part III: Quantifying the Hydraulic Filter Component
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Water 2011, 3(1), 391-423; doi:10.3390/w3010391

Peatlands as Filters for Polluted Mine Water?—A Case Study from an Uranium-Contaminated Karst System in South Africa—Part IV: Quantifying the Chemical Filter Component

School of Environmental Sciences and Development, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa
Received: 12 February 2011 / Accepted: 10 March 2011 / Published: 15 March 2011
(This article belongs to the Special Issue Managing Water Resources and Development in a Changing Climate)

Abstract

This is the final part of a paper series on the ability of peat to filter uranium (U) from mining-polluted water. The focus is on the characterization and site-specific quantification of the chemical component of the filter model introduced in Part II. Based on U levels in different sediment-water systems of the study area that were analyzed in this paper, peat generally displays the highest geochemical U enrichment even though absolute U levels are relatively low. Results of batch experiments suggest that peat removes U from local mine waters exceptionally well, reaching a removal efficiency of close to 100%. However, almost all of the initially sorbed U is released again on subsequent contact with clean dolomitic water. A synoptic summary of the findings presented in Parts I to IV concludes the paper series. View Full-Text
Keywords: peat; uranium; batch experiments; geochemical enrichment; remobilization; dolomitic water; Gerhard Minnebron peatland; karst peat; uranium; batch experiments; geochemical enrichment; remobilization; dolomitic water; Gerhard Minnebron peatland; karst
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Winde, F. Peatlands as Filters for Polluted Mine Water?—A Case Study from an Uranium-Contaminated Karst System in South Africa—Part IV: Quantifying the Chemical Filter Component. Water 2011, 3, 391-423.

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